Technical Questions

Results 1 - 376 of 376

  1. Valve Spring Pressure - Hydraulic Flat Tappet

    Recommended Spring Pressure

    The following table provides general guidelines for street/strip engines with a hydraulic flat tappet camshaft. Engine Type Seat Pressure Open Pressure Stock Small Block 105 - 125 lbs. 220 - 280 lbs. Moderate ...

  2. Valve Spring Pressure - Hydraulic Roller

    Recommended Spring Pressure

    Roller cams have aggressive Lobe Profiles. This requires higher spring pressure to keep the valvetrain under control. The following table provides general guidelines for street/strip engines with a hydraulic roller camshaft. Engine Type ...

  3. Valve Spring Pressure - Solid Flat Tappet

    Recommended Spring Pressure

    Engines with solid cams are generally more performance-oriented. They will need higher spring pressures. The table below gives general guidelines for engines with a solid flat tappet camshaft. Seat Pressure Open Pressure 130 l...

  4. Valve Spring Pressure - Solid Roller

    Recommended Spring Pressure

    Engines with solid roller cams are usually performance, race engines. They use aggressive Lobe Profiles and usually run at high rpm. Because of this, they require the highest spring pressure of all the engine types. Seat Pressure Guidelines Seat p...

  5. Chevy LQ4 Engine Specs

    LS Family , Gen. 3, 6.0L, Iron Block, Truck Engines

    Performance Specifications Compression Ratio 9.4:1 Horsepower Rating 300-330 hp Torque Rating 360-370 ft./lbs.   Application Information VIN 8th Digit ...

  6. Chevy LS1 Engine Specs

    LS Family = Gen. 3, 5.7L, Aluminum Block, Car Engines

    Performance Specifications Compression Ratio 10.2:1 Horsepower Rating 305-350 hp Torque Rating 335-365 ft./lbs   Application Information VIN 8th Digit ...

  7. Upgrading the LM4 and L33 Engines

    Getting more power out of my engine

    On a stock engine, the following upgrades can improve performance and fuel economy: A Cold Air Intake KitHeadersAn Aftermarket ExhaustA Computer Programmer The LM4 and L33 are as light as the LS1/LS6, but have thicker cylinder walls to handle boost ...

  8. Chevy L9H Engine Specs

    LS Family: Gen. 4, 6.2L, Aluminum Block, Truck Engines

    Performance Specifications Compression Ratio 10.5 : 1 Horsepower Rating 403 hp. Torque Rating 417 ft./lbs.   Application Information VIN 8th Digit ...

  9. Chevy L94 Engine Specs

    LS Family: Gen. 4, 6.2L, Aluminum Block, Truck Engines

    Performance Specifications Compression Ratio 10.5 : 1 Horsepower Rating 403 hp. Torque Rating 417 ft./lbs.   Application Information VIN 8th Digit ...

  10. Ford Windsor Small Block Torque Specs

    Ford Windsor 289, 302, 351 Torque Specs.

    The following specs apply to the following Ford Windsor engines: 260 c.i.d. 289 c.i.d. 302 c.i.d. Fastener Type Torque Specs Main Cap Bolts 60-70 ft.-lbs. Connecting Rod Bolts 22-25 ft.-lbs. (40-45 ft.-lbs....

  11. Ford Cleveland and Modified Torque Specs

    Ford 351C, 351M, and 400M Torque Specs.

    The following specs apply to: Ford 351C Ford 351M Ford 400 Fastner Type Torque Spec Main Cap Bolts 95-105 ft.-lbs. Connecting Rod Bolts 40-45 ft.-lbs. (45-50 ft.-lbs. for Boss 351C) Cylinder Head B...

  12. Small Block Chevrolet Torque Specs

    Torque specs for Gen.1 SBC

    The following specs apply to: Gen. I, Small Block Chevy Fastener Type Torque Spec 7/16 in. Outer Main Cap Bolt 65 ft.-lbs. 7/16 in. Inner Main Cap Bolt 70 ft.-lbs. 3/8 in. Outer Main Cap Bolt 40 f...

  13. Big Block Chevy Torque Specs

    Gen 4 and 5 Chevrolet Big Block Torque Specs

    The following specs apply to: Gen IV, Big Block Chevy Mark V, Big Block Chevy Fastener Type Torque Specs Main Cap Bolt (396-427, 2-Bolt) 95 ft.-lbs. Main Cap Bolt (396-454, 4-Bolt, Inner and Outer) 110 ft.-l...

  14. Ford Big Block (385 Series) Torque Specs

    Ford 429 and 460 Big Block Torque Specs

    The following specs apply to: Ford Big Block, 385 Series,429 c.i.d.460 c.i.d. Fastener TypeTorque SpecsMain Cap Bolts95-105 ft.-lbs.Connecting Rod Bolts40-45 ft.-lbs.Cylinder Head Bolts140 ft.-lbs.Rocker Arms (Non-Adjustable)18-22 ft.-lbs.Intake Man...

  15. Ford Big Block (FE Series) Torque Specs

    Ford 360, 390, 406, 427, 428 Big Block Torque Specs

    The following specs apply to: Ford Big Block, FE Series, 360 c.i.d. 390 c.i.d. 406 c.i.d. 427 c.i.d. 428 c.i.d. Fastener Type Torque Specs Main Cap Bolts 95-105 ft.-lbs. Crossbolts (406, 427) ...

  16. Chrysler 426 Hemi Torque Specs

    Gen 2 Hemi Torque Specs

    The following specs apply to: Chrysler 426 Hemi Fastener Type Torque Specs Main Cap Bolts 100 ft.-lbs. Main Cap Tie Bolts 45 ft.-lbs. 7/16 in. Connecting Rod Bolts 75 ft.-lbs. Cylinder He...

  17. Chrysler "Wedge" (B & RB Series) Torque Specs

    Mopar Big Block Engine Torque Specs

    The following specs apply to these Chrysler Big Block engines: B Series, 350 c.i.d. 361 c.i.d. 383 c.i.d. 400 c.i.d. RB Series, 383 c.i.d. 413 c.i.d. 426 Wedge 440 c.i.d. Fastner Type Torque Specs ...

  18. Chrysler Small Block (LA Series) Torque Specs

    Mopar 273, 318, 340, and 360 Engine Torq specs

    The following specs apply to: Chrysler Small Block, LA Series, 273 c.i.d. 318 c.i.d. 340 c.i.d. 360 c.i.d. Fastener Type Torque Specs Main Cap Bolts 85 ft.-lbs. Connecting Rod Bolts (Plain) 45 f...

  19. What is the AMC V8 Firing Order?

    AMC V8 firing order defined.

    Application Details Most AMC V8 engines Cylinder Numbering Front to back1, 3, 5, 7 on the driver side2, 4, 6, 8 on the passenger side Firing Order 1-8-4-3-6-5-7-2 Distributor Rotation Clockwise...

  20. What is the Buick V8 Firing Order?

    Buick V8 firing order defined.

    Application Details Most Buick V8's, except the Nail Head Cylinder Numbering Front to back1, 3, 5, 7 on the driver side2, 4, 6, 8 on the passenger side Firing Order 1-8-4-3-6-5-7-2 Distributor Rotation Clockwise...

  21. Early Chevy V8 Firing Order

    SBC and BBC firing order defined.

    Application Details Gen. 1 and 2 Small Blocks Note: The Gen. 2 distrubutor was mounted on the front of the block. All Big Blocks, except Gen. 7 Cylinder Numbering Front to back 1, 3, 5, 7 on the driver side 2, 4, 6, 8 on the passenger side ...

  22. Chrysler Small Block Firing Order

    Mopar LA series firing order defined.

    Application Details Mopar Small Block LA Series Cylinder Numbering Front to back 1, 3, 5, 7 on the driver side 2, 4, 6, 8 on the passenger side Firing Order 1-8-4-3-6-5-7-2 Distributor Rotation Clockwise ...

  23. What is the Ford Small Block Firing Order?

    289 and 302 firing order defined.

    Application Details Ford Small Block 289 c.i.d. 302 c.i.d. Cylinder Numbering Front to back 1, 2, 3, 4 on the passenger side 5, 6, 7, 8 on the driver side Firing Order 1-5-4-2-6-3-7-8 Distributor Rotation Counter-Clockwise ...

  24. What is the Oldsmobile V8 Firing Order?

    Olds v8 firing order defined.

    Application Details Oldsmobile V8 engines Cylinder Numbering Front to back 1, 3, 5, 7 on the driver side 2, 4, 6, 8 on the passenger side Firing Order 1-8-4-3-6-5-7-2 Distributor Rotation Counter-Clockwise ...

  25. What is the Pontiac V8 Firing Order?

    Pontiac V8 engine firing order defined.

    Application Details Pontiac V8 engines Cylinder Numbering Front to back 1, 3, 5, 7 on the driver side 2, 4, 6, 8 on the passenger side Firing Order 1-8-4-3-6-5-7-2 Distributor Rotation Counter-Clockwise ...

  26. How to Identify the Body Code for Pre 1960 Gm Cars.

    GM Body Codes - Pre 1960

    These charts provides the body codes for GM vehicles made before 1960. A-Body Make Model Chevrolet Bel Air 150 210 Del Ray Biscayne Impala El Camino Pontiac Chieftan Star Chief Super Chief Bonneville Catalina Ventura ...

  27. How to Identify the Body Code for a 1961-65 Gm Car.

    GM Body Codes - 1961-65

    These charts provides the body codes for GM vehicles made between 1961-65. A-Body Make Model Buick Special (1964-65) Skylark Sportwagon Chevrolet Chevelle Malibu, Malibu SS El Camino Oldsmobile F-85 (1964-65) Vista Cruiser Cut...

  28. How to Identify the Body Code for an 1966-1970 Gm Car.

    GM Body Codes - 1966-70

    These charts provides the body codes for GM vehicles made between 1966-70. A-Body Make Model Buick Special Skylark Sportwagon Chevrolet Chevelle Malibu, Malibu SS El Camino Oldsmobile F-85 Vista Cruiser Cutlass Pontiac Tempe...

  29. How to Identify the Body Code for an 1971-1975 Gm Car.

    GM Body Codes - 1971-75

    These charts provides the body codes for GM vehicles made between 1971-75. A-Body Make Model Buick Skylark Century Regal Sportwagon Chevrolet Chevelle Malibu Laguna Monte Carlo Oldsmobile F-85 Cutlass Pontiac Tempest LeM...

  30. How to Identify the Body Code for a 1979-1980 Gm Car

    GM Body Codes by Model

    These charts provides the body codes for GM vehicles made between 1976-80. A-Body Make Model Buick Century (1976-77) Regal Chevrolet Malibu Laguna Monte Carlo Oldsmobile Cutlass Pontiac LeMans Grand Am Grand Prix  ...

  31. How to Identify the Body Code for an 1981-1985 Gm Car.

    GM Body Codes - 1981-85

    These charts provides the body codes for GM vehicles made between 1981-85. A-BodyMakeModelBuickCentury (1981)Regal (1981)ChevroletMalibu (1981)El CaminoMonte CarloCelebrity (1982-85)OldsmobileCutlass (1981)Ciera (1982-85)PontiacLeMansGrand Prix (198...

  32. What's the Firing Order for a Buick Nail Head?

    Buick Nail Head V8 Firing Order.

    Application Details Buick Nail Head V8 401 c.i.d. 425 c.i.d. Cylinder Numbering Front to back 1, 3, 5, 7 on the passenger side 2, 4, 6, 8 on the driver side Firing Order 1-2-7-8-4-5-6-3 Distributor Rotation Clockwise ...

  33. What's the Firing Order for a Late Model GM V8?

    Gen 3, 4, and 5 GM Small Block and Gen 7 GM Big Block Firing Orders

    Application Details Gen. 3 and 4 Small Block (LS-based engines) Gen. 5 Small Block (LT-based engines) Gen. 7 Big Block (8.1L Vortec) Cylinder Numbering Front to back 1, 3, 5, 7 on the driver side 2, 4, 6, 8 on the passenger side Firing Order 1...

  34. What Is The Firing Order For A Chrysler Big Block?

    Mopa Big Block Firing Order

    Application Details Mopar Big Blocks B Series RB Series Mopar 426 Hemi Cylinder Numbering Front to back 1, 3, 5, 7 on the driver side 2, 4, 6, 8 on the passenger side Firing Order 1-8-4-3-6-5-7-2 Distributor Rotation Counter-Clockwise ...

  35. What is the Chrysler Gen. 3 Hemi Firing Order?

    Mopar Gen 3 Hemi Firing Order.

    Application Details Mopar Hemi, Gen. 3 Cylinder Numbering Front to back 1, 3, 5, 7 on the driver side 2, 4, 6, 8 on the passenger side Firing Order 1-8-4-3-6-5-7-2 ...

  36. Ford 351 Windsor Firing Order

    Application Details Ford 351W Cylinder Numbering Front to back 1, 2, 3, 4 on the passenger side 5, 6, 7, 8 on the driver side Firing Order 1-3-7-2-6-5-4-8 Distributor Rotation Counter-Clockwise ...

  37. Ford Cleveland & Modified Firing Order

    Application Details Ford 351C Ford Modified 351 c.i.d. 400 c.i.d. Cylinder Numbering Front to back 1, 2, 3, 4 on the passenger side 5, 6, 7, 8 on the driver side Firing Order 1-3-7-2-6-5-4-8 Distributor Rotation Counter-Clockwise ...

  38. What is the Ford 5.0L EFI Firing Order?

    Firing Order For Fuel Injected 5.0L Engines.

    Application Details Ford 5.0L (Fuel Injected) Cylinder Numbering Front to back 1, 2, 3, 4 on the passenger side 5, 6, 7, 8 on the driver side Firing Order 1-3-7-2-6-5-4-8 Distributor Rotation Counter-Clockwise ...

  39. Ford Big Block (FE) Firing Order

    Application Details Ford Big Block, FE Series Cylinder Numbering Front to back 1, 2, 3, 4 on the passenger side 5, 6, 7, 8 on the driver side Firing Order 1-5-4-2-6-3-7-8 Distributor Rotation Counter-Clockwise ...

  40. Ford Big Block (385 Series) Firing Order

    Application Details Ford Big Block, 385 Series 429 c.i.d. 460 c.i.d. Cylinder Numbering Front to back 1, 2, 3, 4 on the passenger side 5, 6, 7, 8 on the driver side Firing Order 1-5-4-2-6-3-7-8 Distributor Rotation Counter-Clockwise ...

  41. Ford Modular Engine Firing Order

    Application Details Ford Modular V8's, except the  Cylinder Numbering Front to back 1, 2, 3, 4 on the passenger side 5, 6, 7, 8 on the driver side Firing Order 1-3-7-2-6-5-4-8 ...

  42. What is the Ford Flat Head Firing Order?

    Ford Flat Head V8 Firing Order

    Application Details Ford Flat Head V8 Cylinder Numbering Front to back 1, 2, 3, 4 on the passenger side 5, 6, 7, 8 on the driver side Firing Order 1-5-4-8-6-3-7-2 Distributor Rotation Counter-Clockwise ...

  43. What is the Ford Y-Block Firing Order?

    Firing Order for Ford Y block V8s

    Application Details Ford Y-Block V8's Cylinder Numbering Front to back 1, 2, 3, 4 on the passenger side 5, 6, 7, 8 on the driver side Firing Order 1-5-4-8-6-3-7-2 Distributor Rotation Counter-Clockwise ...

  44. What is the Ford 5.0L Coyote Firing Order?

    Firing Order for Ford Boss 302 and F150 Coyote Engines.

    Application Details Ford 5.0L Coyote, including: The Boss 302 variant The F-150 variant Cylinder Numbering Front to back 1, 2, 3, 4 on the passenger side 5, 6, 7, 8 on the driver side Firing Order 1-5-4-8-6-3-7-2 ...

  45. Ford 5.2L Voodoo / Predator Firing Order

    Application Details Ford 5.2L Voodoo Ford 5.2L Predator Cylinder Numbering Front to back 1, 2, 3, 4 on the passenger side 5, 6, 7, 8 on the driver side Firing Order 1-5-4-8-3-7-2-6 ...

  46. Supercharging Basics – Engine Preparation

    Engine preparation depends solely on how the engine will be used. Factors like engine speed, amount of boost, and  Guidelines If using a stock engine, follow these guidelines for optimization. 7.0:1 to 9.0:1 compression ratio. The optimum ...

  47. Supercharging Basics – Cylinder Head and Valvetrain Preparation

    Weak valve springs or burned valves can lead to backfires. When an engine has more than 50,000 miles on it, you should inspect the entire valvetrain. Guidelines If valve springs require replacement, use factory heavy-duty springs. Follow camshaft...

  48. Supercharging Basics – Camshaft Selection

    A supercharger can overcome inadequacies in a stock cam up to about 4,500 - 5,000 rpm. You will typically find performance with a blower will not be significantly enhanced below these speeds with a cam change. However, for optimum performance at hig...

  49. Supercharging Basics – Carburetion

    At full throttle, a blown engine can require 50% more air than an unblown engine. As a result, it needs a larger carburetor(s) in order to make maximum power and boost. However, if your blown engine is primarily driven on the street at moderate engi...

  50. Supercharging Basics – Ignition System

    Most late model OEM electronic ignition systems have the capability of working well with a supercharger. Guidelines Set the initial timing at 6 to 10 degrees BTDC. The distributor advance curve should be calibrated to give a total advance of 28 to ...

  51. Supercharging Basics – Supercharger Drive Ratios

    Boost itself is a direct result of three factors: engine size, blower size, and the speed the blower is driven in relation to the engine speed. A bigger blower driven at the same speed as a smaller blower will produce more boost. The amount of boost...

  52. Mopar Body Codes - Pre 1960

    Mopar Body Codes Explained

    These charts provide the body codes for Mopar vehicles made before 1960. A-Body Make Model Plymouth Valiant (1960-76) C-Body Make Model Chrysler Windsor (1957-61) ...

  53. Mopar Body Codes - 1961-65

    Mopar Body Codes Explained

    These charts provide the body codes for Mopar vehicles made between 1961 and 1965. A-Body Make Model Dodge Lancer (1961) Dart (1963-76) Plymouth Valiant (1960-76) Barracuda (1964-69) ...

  54. Mopar Body Codes - 1966-70

    Mopar Body Codes Explained

    These charts provide the body codes for Mopar vehicles made between 1966 and 1970. A-Body Make Model Dodge Dart (1963-76) Plymouth Valiant (1960-76) Barracuda (1964-69) Duster (1970-76)...

  55. Mopar Body Codes - 1971-75

    Mopar Body Codes Explained

    These charts provide the body codes for Mopar vehicles made between 1971 and 1975. A-Body Make Model Dodge Dart (1963-76) Demon (1971-72) Plymouth Valiant (1960-76) Duster (1970-76) ...

  56. Mopar Body Codes - 1976-80

    Mopar Body Codes Explained

    These charts provide the body codes for Mopar vehicles made between 1976 and 1980. A-Body Make Model Dodge Dart (1963-76) Plymouth Valiant (1960-76) Duster (1970-76) Scamp (1971-76) ...

  57. Chevrolet LS Gen. 3, Aluminum Block Torque Specs

    Gen. 3, Aluminum Block, LS Engines

    The following specs apply to RPO codes: LS1 LS6 LM4 L33 **Click the blue links in the table for more detailed information** Fastener Type Fist Pass Second Pass Final Pass Main Caps Inner Bolts 15 ft.-lbs. ...

  58. Gen. 3, Iron Block Torque Specs

    Gen. 3, Iron Block, LS Engines

    The following specs apply to RPO codes: LR4 LM7 L59 LQ4 LQ9 **Click the blue links in the table for more detailed information** Fastener Type First Pass Second Pass Final Pass Main Caps Inner Bolts 15 ft.-l...

  59. Chevrolet LS Gen. 4 Aluminum Block Torque Specs

    Gen. 4, Aluminum Block, LS Engines

    The following specs apply to RPO codes: LS2 LS3 LS4 LH6 LC9 L92 Etc. **Click the blue links in the table for more detailed information** Fastener Type Fist Pass Second Pass Final Pass Main Caps Inner Bolts ...

  60. Chevrolet LS Gen. 4 Iron Block Torque Specs

    Gen. 4, Iron Block, LS Engines

    The following specs apply to RPO codes: LY2 L20 LY5 LMG LMF LY6 L96 **Click the blue links in the table for more detailed information** Fastener Type Fist Pass Second Pass Final Pass Main Caps Inner Bolts ...

  61. How do I tell the difference between the Early 5.7L Gen 3 Hemi and the later “Eagle” version?

    Identify Early and Late Gen 3 5.7L Engines by Inspection

    The easiest way to tell the difference between early and late 5.7Ls is by checking the casting number on the front driver’s side of the block. What casting number do you have? 53021319AG 53021319CB 53021319DK 53021314DR ...

  62. Gen 3 Hemi Torque Specs

    Torque Specifications for Gen 3 Hemi Engines

    The torque specs are fairly similar between the Gen 3 Hemi engines. However, there are some differences. Please see the chart below for some of the critical torque specs for your engine.   Fastener Type5.7L5.7L Eagle6.1L6.4L6.2LMain Caps1M1220 ...

  63. How do I remove a Gen 3 Hemi Cam?

    Camshaft Removal Procedure for 2003 and Later Mopar Hemi Car, SUV, and Truck Engines

    Remove the wiring harness and fuel lines from the intake manifold, then remove the intake manifold bolts starting with the innermost bolts and work your way out in a crisscross pattern.Unbolt the coils and valve covers.Remove the rocker shafts start...

  64. How do I install a Gen 3 Hemi cam?

    Camshaft Installation Procedure for 2003 and Later Mopar Car, SUV, and Truck Hemi Engines

    Install the M12x1.75 bolt in the cam shaft Lube the camshaft with generous amounts of Assembly Lube or Paste.Carefully install the cam into the cam bore and install the thrust plate.Install the cam phaser/sprocket and measure camshaft end play with ...

  65. Coyote 5.0L Torque Specs

    Torque Specifications for Ford Coyote Engines

    Torque specs for Coyote 5.0L engines are the same. There is no difference in spec from F150 to Mustang. Please see the chart below for some of the critical torque specs and tightening sequences for your engine   Fastener TypeFirst PassSecond Pa...

  66. What does it mean when a torque converter "locks up"?

    Overview of Lockup Torque Converters Unlike other converters, Lockup Converters contain a clutch. When the clutch engages, it locks the engine to the transmission input shaft, providing a direct 1:1 drive ratio. Why would you want a lockup con...

  67. Why would a camshaft wear out or break?

    Common Camshaft Failures and Causes The camshaft itself is rarely to blame when it fails. What most people claim as camshaft failure is usually 1 of 4 things: Excessive wear, Mechanical interference, Broken pieces, or A cracked camshaft. Exc...

  68. Do I need new lifters when I change my camshaft?

    When to Replace or Reuse Lifters

    Flat Tappet Camshafts New Flat Tappet Lifters are ALWAYS required for flat tappet cams. Used flat tappet lifters will have a wear pattern on the face. This wear pattern will prevent the lifter from spinning appropriately. It will cause heavy wear ...

  69. What is an oil restrictor?

    Definition and Description

    An Oil Restrictor installs in the oil passages of the engine block. It limits the flow of oil to some parts of the engine. Why would you want that? Engine oil lubricates and cools vital engine components. In most cases, more oil usually means the ...

  70. How do I prime my engine before the first start-up?

    Oiling System Priming Instructions

    It is critical that the oiling system be primed before the first start-up. Priming fills the internal oil passages so that all moving parts have oil, once the engine is started. Engine oil lubricates and cools moving parts of the engine. **Failing ...

  71. Where should I mount my fuel pressure gauge?

    Installation Tips for Electrical and Mechanical Gauges

    A fuel pressure gauge allows you to monitor the fuel pressure while the engine is under a load. This will ensure you get the performance you are looking for. It can also help you identify a problem before it gets out of hand. Where the gauge is mou...

  72. What does a harmonic balancer do?

    Definition and Description

    In spite of its name, a Harmonic Balancer does not actually balance the rotating assembly. It absorbs torsional vibration so it is not transfered to the other parts of the engine. This is why it is also called a "damper" or "dampener". Wh...

  73. When should I replace my stock harmonic balancer?

    Reasons to Upgrade

    Obviously, if your harmonic balancer is damaged, it should be replaced. But there are also other reasons to consider an upgrade. Stock harmonic balancers are designed to work best with a stock rotating assembly, spinning at relatively low RPM's. Wh...

  74. What is an AN fitting?

    Plumbing Basics - AN Fittings and Hoses

    AN stands for Army-Navy. The size specifications were established by the military back in World War II. They were originally used in the aerospace industry. AN fittings use a 37 degree flare as the sealing surface. DO NOT use AN fittings with diffe...

  75. What is the difference between brake fluids?

    DOT 3 vs. DOT 4 vs. DOT 5 vs. DOT 5.1

    The braking system on any vehicle is a critical safety system. It becomes even more critical in race and performance applications. Bringing your car to a stop generates a lot of heat. The heavier the vehicle and the faster it is going, the more hea...

  76. Which way do I install copper exhaust gaskets?

    Copper Exhaust Gasket Orientation

    The flat side of the gasket goes against the cylinder head. Why? The mating surface on the head is more likely to be flat. The headers or manifolds have less material and are more likely to be distorted due to heat. The raised areas on the gasket ...

  77. What is a brake proportioning valve?

    Definition and Description

    A Brake Proportioning Valve is commonly found on vehicles with front disc and rear drum brakes. It is a safety valve that restricts flow to the rear brakes during a “panic stop.” This prevents the rear wheels from locking up before the front wheels....

  78. Small Block Chevy Casting Numbers

    Please see the attached charts to help figure out exactly what you have....

  79. Small Block Ford Casting Numbers

    We have a list of the small block Ford casting numbers used and this should help you determine what you are working with. Just click the attachments under this message and find your number. ...

  80. Pontiac Casting Numbers

    Please see the attachments below for cylinder block and head casting numbers used on Pontiac engines....

  81. Big Block Mopar Casting Numbers

    Please see the attachments below for a list of cylinder block, head, and intake manifold casting numbers used on big block Mopar engines. ...

  82. Ford V-8 Casting Numbers

    Please see the attachments below for a list of cylinder block, head, crankshaft, and pushrod casting numbers used on Ford V8 engines. ...

  83. Big Block Chevy Casting Numbers

    Please see the attachment below for a list of cylinder block casting numbers used on Chevy big block engines. ...

  84. Big Block Ford Casting Numbers

    Please see the attachments below for a list of cylinder block, head, and crankshaft casting numbers used on Ford big block engines. ...

  85. Small Block Mopar Casting Numbers

    Please see the attachments below for a list of casting and identification numbers used on small block Mopar engines. These attachments have information on the cylinder blocks, heads, connecting rods, pushrods, crankshafts, dampers, and flywheels tha...

  86. How do I mount my new slicks?

    Racing Tire Mounting Instructions

    These are general mounting instructions. Always follow the manufacturer's specific mounting instructions. If using an inner tube, please follow this link for Tips on Installing an Inner Tube. Clean the bead and all interior surfaces of the rim. ...

  87. Are racing tires supposed to be balanced?

    Balancing Racing Slicks

    Most manufacturers suggest racing tires be static balanced (also called "bubble balance"). Static balancing ensures the tire is balanced around its circumference, even as it deforms. This reduces vibrations at high speed and enhances tread life. Dy...

  88. What is tire rollout?

    Definition and Description

    Rollout is the circumference of the tire when it is is inflated to operating pressure. Matching the rollout of both tires on the axle means that each tire travels exactly the same distance for each rotation. Differences in rollout can cause the car ...

  89. Are drag slicks directional?

    Directional Requirements by Manufacturer

    Some slicks are directional right out of the mold. Any tire with a rotation arrow should be mounted so it spins in that direction. All slicks are considered directional once they are used. Goodyear Racing Tires All Goodyear racing tires have an 8 ...

  90. Should I rotate my slicks?

    Drag Racing Tire Rotation

    All racing tire manufacturers recommend rotating drag slicks. Rotaing slicks is also called "cleaning" the tires. How do I do it? To rotate your slicks, just swap the tires from side to side. Most racers will run the tires like this for 1-5 passes...

  91. My tires have wrinkles, bulges in them. What should I do?

    Diagnostic and Repair Procedure

    In a bias ply racing slick with an inner tube, sidewall defects are usually caused by two things: The tube is the wrong size for the tire. The tube is improperly installed. In a racing slick without a tube (radial or bias ply), sidewall defect...

  92. What tire pressure should I run in my slicks?

    Drag Slicks and Tire Pressure

    There is really no good way to recommend tire pressure. Tire pressure is affected by tire compound, track conditions, vehicle weight, horsepower, and many other variables. In fact, the right pressure for your car might change between passes at the t...

  93. How long will a set of drag slicks last?

    Tire Wear on Drag Slicks

    The life of a drag racing tire can be determined by many factors. Tire compound, track conditions, vehicle weight, and Horsepower all play a role. Inspect the tire after every few passes and follow the guidelines below to maximize the life of y...

  94. How should I store my drag slicks?

    General Care and Storage Instructions

    Whether you park your car for the week or store it for the winter, follow these guidelines to maximize the life and performance of your drag slicks. Park the car on spare tires that are not meant for competition. If you don't have a spare se...

  95. How do I set my valve lash?

    Procedure for a Solid Cam and Lifters

    Valve lash is a small gap between the valvetrain components. It allows the metal parts to expand as they warm up without moving the valves. When the camshaft moves the lifter, it must take up the lash before the valve actually moves. Preparation T...

  96. Basic Engine Swap Guide

    Measurement Chart and Checklist

    Ever since that first Hot-Rodder dumped his Model A’s four-banger for a Flathead V8, engine swaps have been a proven way to get the extra Horsepower we all crave. Some swaps are no-brainers, particularly when you are swapping an engine for one ...

  97. GM 2 Speed Transmission Dimensions

    GM Powerglide Transmission Measurements

    Powerglide Bellhousing pattern - Chevrolet, Fit-All     Style A B C D E Short Shaft 25 23/64 in. 20 9/16 in. 16 5/16...

  98. GM 3 Speed Transmission Dimensions

    GM Turbo 350 and 400 Transmission Measurements

    TH-350 Bellhousing pattern - Chevrolet, BOP, Fit-All   Style A B C D E 6 in. Tailshaft 27 11/16 in. 21 5/8 in. 20 3/8 in....

  99. GM 4 Speed (Overdrive) Transmission Dimensions

    GM 200-R4, 700-R4, 4L60, 4L80 Transmission Measurements

    200-R4 Bellhousing pattern - BOP, Fit-All   Style A B C D E All 27 11/16 in. Integral Tailhousing 27 in. 3 3/4...

  100. Ford 3 Speed Transmission Dimensions

    C-4 and C-6 Transmission Measurements

    C-4 Bellhousing pattern - (removable) 4 cylinder, Small Block, Big Block   Style A B C D E Pan Fill 24 5/16 in. 16 3/4 in. ...

  101. Chrysler 3 Speed Transmission Dimensions

    Torqueflite A-727 and A-904 Transmission Measurements

    **Dimension "C" is the distance from the bellhousing to the center of the transmission mounting pad. The mount is usually part of the extension housing. The image shows it as part of the main housing. In reality, Dimension "C" is longer than Dimen...

  102. Manual Transmission Dimensions

    T5, T10, T56, A-833, Toploader Transmission Measurements

      Model A B C D E F GM Super T10, Muncie, Saginaw 6.3 in. 14.2 in. 23 in. N/A N/A 3.75 ...

  103. How do I care for my new wheels?

    Tips and Tricks

    You spent a lot of money on those new wheels. Protect your investment by following the guidelines below: New wheels will compress slightly when you start driving them, causing the lugs to lose some torque. Re-torque them after the first 50-100 mi...

  104. How do I set my preload?

    Procedure for a Hydraulic Cam and Lifters

    Lifter preload is the distance the pushrod seat moves down away from the retaining lock. This specific amount of space allows hydraulic lifters enough space to move. Preparation To properly set preload, the lifter must be located on the base circl...

  105. What do I need to do after installing a "Turn-Key" crate engine?

    Adjustments to a New Crate Engine

    Crate Engines are built to work well in a variety of conditions and applications. However, some adjustments, like carburetor tuning and Ignition and Timing adjustments should be made (if required). Proper adjustments will ensure the best drivability...

  106. How old is my Stewart Warner gauge?

    Date Codes for Stewart Warner Gauges

    Stewart Warner has made a lot of gauges over the years. The company can trace its origins back to1905. In fact, John Stewart's speedometers were used in the original Ford Model T. Collectors and enthusiasts often have an old gauge and need to know ...

  107. My balancer isn't going on far enough and the pulleys don't line up. How far out should it be?

    Chevy Harmonic Balancer Installed Height

    Measured from the machined surface, on the front of the block, to the face of the balancer where the pulley mounts: 3 in. on a Small Block Chevrolet 3 1/16 in. on a Big Block Chevrolet ...

  108. What is the compression ratio?

    Definition and Description

    Compression Ratio (CR) tells you the relationship between minimum and maximum cylinder volume. The cylinder is largest when the piston is at BDC. It is smallest when the piston is at TDC. The ratio is expressed as: Max. Cylinder Vol. : Min. Cylinde...

  109. How do I check the gap between the piston and the valves?

    Piston to Valve Clearance Measurement Instructions

    Before you begin, you will need: All tools to remove and install the cylinder heads, Modeling clay or something similar, And Dial Calipers. Watch this video and read the procedure below for more on how to check piston to valve clearance. ...

  110. How do I install a new camshaft?

    Installation and Degreeing Procedure

    Installing and adjusting (or "degreeing") the camshaft can be tricky. It can be done using either: The theoretical centerline of the #1 intake lobe, or The valve opening and closing events, based on a pre-determined amount of Lift (usually 0.050...

  111. How do I tell the difference between a Tremec 3650 and a T-5 transmission?

    The T-5 vs. The TR3650 Transmission

    In 2001, Ford used 2 different manual transmissions in the Mustang. The easiest way to tell the difference is to look for the drain plug. The T-5 (T-45) transmission has the drain plug on the passenger side of the transmission case. The TR3650 trans...

  112. How do I know which rear end is in my vehicle?

    Differential Identification Charts

    There are several ways to identify the axle under your vehicle. Having a visual reference is probably the easiest way. Please open the attached documents to see pictures of the cover gaskets, and differential covers for many popular rear ends. ...

  113. How do I bring my AGM battery back from the dead?

    Recharging Instructions for a "Dead" AGM Battery

    Situation Details An AGM Battery is "dead". It will not recharge using a standard battery charger. Solution Option #1 Buy a modern Battery Charger with AGM-specific settings. Most modern chargers: Provide de-sulfation steps that recondi...

  114. Do I have to use inner tubes?

    Overview of Tire Tubes

    Tire Tubes help retain air, enhance performance, and increase stability. However, in some cases, it is appropriate to run the tire without a tube. The decision to run with or without tubes should be based on safety and performance, NO...

  115. What's the best way to tighten stainless steel locking ties?

    The DEI Locking Tie Tool

    The best way to get a professional looking result when using Locking Ties is to use a tool specially designed for this purpose such as the Design Engineering Locking Tie Tool, which attaches to any 1/4" drive. This tool will save you the time ...

  116. How do I tell if my 2004 Ford F150 is a Heritage Edition?

    The 2004 F150 vs. The 2004 F150 Heritage Edition

    In 2004, Ford introduced a new F150 body style. However, they still had 2003 models to be sold. So, they badged the older models as the 2004 F150 Heritage. This can be confusing for owners of either model when shopping for parts and accessories. Mo...

  117. What is wheel backspacing?

    Definition and Description

    Backspacing is the distance from the innermost surface of the rim to the hub mounting surface. It is important because it can contribute to clearance issues with the suspension and body. How is it measured? Backspacing is measured in inches. ...

  118. Wheel Installation

    Installation Tips and Torque Specs

    Properly installing your wheels and tires only takes a few minutes. But, it helps maximize the life of your tires and ensures the safe operation of your vehicle. Just follow the steps below for a quick, trouble-free installation. Before lifting the...

  119. Do I need hub centric rings for my new wheels?

    Overview of Hub Centric Rings

    What are they? Hub Centric Rings fit in the center bore of the wheel and over the hub pilot on the axle. They fill the gap between the two surfaces. The rings can be made from metal or plastic. How do they affect performance? Hub centric rings ...

  120. What size drill bit do I need to install new wheel studs?

    Drill Size for Press-In Wheel Studs

    To determine what drill size you need, you will need to know: The axle hub material, and The wheel stud knurl diameter. If your axle hub material is cast iron or steel, your drill size will be 0.005 in. smaller than the knurl diameter. If y...

  121. Is backspacing related to wheel offset?

    Backspacing to Offset Conversion Chart

    Use this chart as a quick reference to find your offset based on the wheel width and backspacing. Back- spacing 3.25 in. 3.5 in. 3.75 in. 4.0 in. 4.25 in. 4.5 in. 5.0 in. 5.25 in. 5.5 in. 5.75 in. ...

  122. What do the markings on a tire mean?

    Sidewall Marking Definitions

    The sidewall of a tire contains a lot of valuable information. It can tell you the brand and model of the tire, size, maximum load, and max speed the tire can handle. All of this information is valuable when replacing your worn tires or upgrading fo...

  123. How do I know how old my tires are?

    Determine Tire Age by Serial Number

    The tire serial number is the best way to determine how old a tire is. The serial number is sometimes called a DOT Code. The end of the serial number has a 4-digit number. This is the date of manufacture. The first 2 digits are the week. ...

  124. What's the difference between radial and bias ply tires?

    Tire Construction Methods Explained

    The terms "Radial" and "Bias Ply" are used to describe the internal construction of a tire. The difference between them may seem small, but it has a significant impact on the way the tire performs. Tires are not just big rubber donuts. They are act...

  125. What should I consider when mounting slicks?

    Slick Mounting Details

    Before you start putting the tire on the rim, a few things need to be considered. Please think about the questions below, before mounting your slicks. Will you be using inner tubes? Does your tire say "Tubeless" on the side wall? If not, you have ...

  126. How do I install a tire inner tube?

    Tips and Tricks

    Getting the Inner Tube in the tire and on the wheel properly can be a challenge. However, it is critical that the tube be installed without any twisting, pinching, or wrinkling. Any of these conditions will cause the tube to fail before its time. ...

  127. How do I install rim screws?

    Rim Screws Installation Instructions

    Procedure Dismount the tire from the rim. Lay out where the holes will be drilled in the rim. **Follow this link for more information on How Many Rim Screws You Need.** Center punch and pilot drill the holes with 1/8" drill bit. Final drill...

  128. How Many Rim Screws Do I Need?

    Rim Screws and Your ET

    Before actually drilling any holes, you need to determine how many Rim Screws you need on each side of the wheel. Check the chart below for some basic guidelines. 1/4 Mile ET # of Screws per side of the Rim ...

  129. How much difference can I have in my rollout measurements?

    Tolerance Ranges by Tire Manufacturer

    Each tire manufacturer lists a slightly different tolerance for rollout. Goodyear Racing Tires Match slicks (26 in. diameter and larger) within 3/4 in. **3/4" is an acceptable tolerance from a manufacturing standpoint. Our suppliers match them wi...

  130. How do I adjust my tire pressure for best performance?

    Fine Tune Your Tire Pressure at the Track

    Procedure Get a good Tire Pressure Gauge. Check your tires before and after every run. Keep records to diagnose problems. Make small pressure adjustments, 1 - 2 psi to start, then 1/2 or 1/4 psi to fine tune it. Reduce the pressure if: T...

  131. What tire pressure should I run in my race tires?

    Mickey Thompson Racing Tire Pressure Guidelines

    These pressures are for off-highway use only and based on optimum chassis and drive train setups. Keep in mind that these are purely starting points. Actual optimum air pressure may vary significantly. If you have been running another brand of slic...

  132. What is TPMS?

    Definition and Description

    TPMS stands for Tire Pressure Monitoring System. Proper tire pressure is critical to the safe operation of any vehicle. Tire pressure affects stability, steering, and braking performance. When air pressure in one or more tires drops 25% below the c...

  133. Do I have TPMS?

    Confirm a Tire Pressure Monitoring System (TPMS)

    To confirm if your vehicle has TPMS, turn the key to the "On" position without starting the engine. If you see a light on your dashboard that looks like the one below, you have TPMS. You can also check the owners manual for your vehicle for more ...

  134. TPMS System Types

    Direct vs. Indirect TPMS Systems

    TPMS systems are either direct or indirect monitoring systems. Check your owners manual to confirm what type of TPMS system your vehicle has. Indirect TPMS Systems Indirect systems calculate tire pressure from wheel rotations. The ABS wheel speed ...

  135. What  pressure should I run in my street tires?

    Locating Factory Recommended Tire Pressure

    Tire size, vehicle weight, and vehicle load all affect the recommended tire pressure for your vehicle. The correct tire pressure can be found in the owners manual or on the tire placard. The tire placard can be found on the edge of the drivers door...

  136. How do I reset my TPMS sensors?

    TPMS Sensor Re-Learn Procedure

    Whenever, you rotate your tires, you need to reset the TPMS system. This process is also know as re-learning. It ensures the computer recognizes all the sensors and which tire they are in. Every manufacturer uses different systems. So, the procedure...

  137. What is the difference between a flat tappet and a roller camshaft?

    Flat Tappet vs. Roller Camshafts

    Camshafts are classified by the type of lifter they use. The lobes on the cam are machined differently based on the intended lifter. Lifters are sometimes called a "follower" or "tappet." They contact the cam lobe with either a flat surface or a whe...

  138. What is Camshaft Lift?

    Definition and Description

    When someone refers to lift, they could be talking about 2 different things. Valve Lift When talking about camshafts and lift, people usually mean valve lift. This is the distance the valve actually moves. It is also called "gross lift." All c...

  139. Advancing / Retarding a Camshaft

    A Basic Overview of Cam Timing

    To advance or retard a camshaft is to change the alignment between the camshaft and the crankshaft. When a cam is installed "straight-up," the imaginary centerlines of the two shafts line up exactly. Advancing or retarding the cam pushes the centerl...

  140. How do I break in my flat tappet camshaft and lifters?

    Procedure

    Breaking in an engine with a flat tappet camshaft is critical to its performance and long life. This mates the lifters to the cam lobes. Most camshafts will come with specific break-in procedures. The following procedure could apply to any engine w...

  141. How do I break in my roller camshaft and lifters?

    Procedure

    Breaking in an enigne with a roller camshaft is important. Metal particles are created during break-in. This is the biggest issue for the bearings in the roller lifter. Most camshafts come with specific break-in procedures. The following procedure ...

  142. What is valve spring coil bind?

    Definition and Description

    Coil bind happens when the valve spring is fully compressed. The coils of the spring contact each other. This stops the valve from opening any further. Coil bind can result in damage to the cam lobe, lifter, pushrod, rocker arm, valve stem, etc... ...

  143. Retainer to Seal / Valve Guide Clearance

    Minimum Recommended Clearance

    When the valve is at max lift, a minimum of 0.060 in. clearance is required between the bottom of the retainer and the seal, or the top of the valve guide. ...

  144. What is piston to valve clearance?

    Definition and Recommended Clearance

    Piston to valve clearance is the minimum distance between the valve and piston. On the intake stroke, it's when the intake valve is opening with the piston near TDC. On the exhaust stroke, it's when the exhaust valve is closing and the piston i...

  145. What is rocker arm slot to stud clearance?

    Definition and Description

    The slot in the rocker arm needs to allow at least 0.060 in. more travel than required when the valve is at max lift. Why is it important? When you increase valve lift, there is a chance you could max out the rocker arm. With higher lift...

  146. What is camshaft end play?

    Definition and Description

    End play is how far the camshaft moves in the engine block, from back to front. It is sometimes referred to as how far the cam will "walk." End play only applies to Roller Camshafts. Flat tappet cams have tapered lobes that force the camshaft towar...

  147. What is a carburetor choke?

    Definition and Description

    When an engine is cold, it requires a richer Air/Fuel Mixture to get started. A choke is used to create that condition. The choke is a plate or blade that covers the primary barrels. It restricts airflow through the carburetor. This means that there...

  148. What's the bore and stroke for an LS engine?

    Chevy LS Engine Displacment, Bore and Stroke Chart

    For all Gen. 3 and 4 Chevy small block engines with the same Displacement, the Bore Diameter and Stroke Length are the same. The chart below lists the stock bore and stroke measurements. Engine Size Bore Stroke 4.8L / 293 c....

  149. Why won't my 700R4 transmission with a reverse valve body shift into overdrive?

    Check your Shifter's Gate Pattern

    Application Details Chevrolet 700R4 TransmissionReverse shift pattern valve bodyB&M Pro Stick, Pro Bandit, Street Bandit, and Stealth Shifters. Solution Replace the shifter with one that is compatible with the reverse valve body. Follow this lin...

  150. What is volumetric efficiency (VE)?

    Definition and Description

    Volumetric efficiency (VE) is the actual amount of air flowing through an engine, compared to its theoretical maximum. Basically, it is a measure of how full the cylinders are. VE is expressed as a percentage. An engine operating at 100% VE is usin...

  151. How tight should this AN hose be?

    Torque Specs for AN Fittings

    The table below lists the torque range for each AN fitting size. AN Size Aluminum Fittings Stainless Steel Fittings in.-lbs. ft.-lbs in.-lbs. ft.-lbs. ...

  152. I know my VIN. Which LS engine do I have?

    Identify Chevy LS Engines by VIN

    Chevrolet's 3rd and 4th generation small block engines are generally known by their RPO code. You can determine the RPO code if you have the Vehicle Identification Number (VIN) from the original vehicle. Locate the 8th digit of the VIN.Consult the t...

  153. Where do I hook up the "R" wire on my points ignition?

    "R" Wire Connection with Points Ignition

    Application Details Chevrolet Gen 1 small block V8 Chevrolet Mark IV big block V8 Any points-style distributor Solution Install this Powermaster Diode Wiring Harness 600. Cause The "R" circuit is a ballast resistor bypass. When the st...

  154. What is valve float?

    Definition and Description

    Valve float occurs when the valvetrain gets out of control. It is caused by not having enough Valve Spring Pressure. There are 2 types of valve float: Loft - When the lifter is thrown off the nose of the cam lobe. Bounce - When the v...

  155. Where do I hook up the "R" wire on my electronic ignition?

    "R" Wire Connection with Electronic Ignition

    Application Details Chevrolet Gen I small block V8 Chevrolet Mark IV big block V8 Any HEI, MSD, or other aftermarket electronic ignition Solution The "R" wire can be eliminated. Cause The "R" circuit is a ballast resistor bypass. When the ...

  156. Spark Plug Installation

    Installation Tips and Torque Specs

    An improperly installed spark plug could lead to: Loss of compression, Slow heat transfer, Elevated combustion chamber temperature, Pre-Ignition, or Detonation. Procedure Make sure the engine is cool. Never install spark plugs in a hot e...

  157. The Scavenging Effect

    Definition and Description

    Scavenging occurs when the rush of exhaust gas leaving the cylinder helps to pull in more fresh air (and fuel). How does it work? During the exhaust stroke, the exhaust gases escape the cylinder very quickly. This creates a high-speed pu...

  158. What are Header Primary Tubes?

    Definition and Description

    The primary tubes extend from the Header Flange to The Collector. Each primary acts as the exhaust chamber for the cylinder it's attached to. How are they measured? The 2 dimensions that matter in header primary tubes are: Primary Diamet...

  159. Header Finish - Painted

    Definition and Description

    Painted Headers are the most popular finish option. They are affordable and provide decent rust resistance. The biggest mistake made with painted headers is to assume the paint is finished. Most painted headers come with a temporary shipping paint....

  160. Should I wrap my headers?

    An Overview of Header Wrap

    Header wrapping involves wrapping an insulating cloth around the primary tubes and collector. Header wrap is more expensive than high temp paint. But, it is less expensive than ceramic coating. It can also be done in your garage! You can't buy wr...

  161. Exhaust Reversion

    Definition and Description

    Reversion happens when exhaust gases flow backwards and contaminate the intake charge. (It is the opposite of The Scavenging Effect.) What causes it? Backpressure in the exhaust system causes reversion. It gets worse with excessive&...

  162. Intro to the LQ4 and LQ9

    LS Family: Gen. 3, 6.0L, Iron Block, Truck Engines

    LQ4 The LQ4 was introduced in 1999 as one of the first LS truck engines. It was available in GM pickups, vans, and SUVs until 2007. The LQ4 was also known as the Vortec 6000. LQ9 The LQ9 was an improved, high-output version of the LQ4. It was int...

  163. Intro to the LS1 and LS6

    LS Family = Gen. 3, 5.7L, Aluminum Block, Car Engines

    LS1 The LS1 is the original LS engine. It was first produced in 1997 for the new C5 Corvette. It was available in GM cars from 1997 to 2004. LS6 The LS6 is an improved version of the LS1. It was introduced in 2001 for the Z06 Corvette. The LS6 wa...

  164. Intro to the LR4, LM7, and L59

    LS Family: Gen. 3, 4.8L / 5.3L, Iron Block, Truck Engines

    LR4 The LR4 was introduced in 1999. Along with the LM7 and LQ4, they were the first LS truck engines. The LR4 was available in GM pickups, vans, and SUVs until 2007. It was a 4.8L engine known as the Vortec 4800. LM7 The LM7 was also introduced i...

  165. Intro to the LM4 and L33

    LS Family: Gen. 3, 5.3L, Aluminum Block, Truck Engines

    LM4 The LM4 was introduced in 2003 as a lightweight version of the LM7. It was available in GM SUVs until 2005. The LM4 was also known as the Vortec 5300. L33 The L33 was introduced in 2005 as the "High Performance" 5.3L engine. It was only avail...

  166. What is an NPT fitting?

    Plumbing Basics and NPT Fittings

    NPT stands for National Pipe Taper. NPT fittings are used in many different applications, such as: Fuel Systems Pumps Regulators Filters Aftermarket Brake Calipers Oil & Coolant Passages in Intake Manifolds Cylinder Heads ...

  167. What is an AGM battery?

    Definition and Description

    An Absorbed Glass Mat (AGM) Battery is made of thick plates with electrolyte in specially designed fiberglass mats in between the plates. They may also be known as: Sealed regulated valve Dry cell Non-spillable Valve-regulated lead acid batter...

  168. What speedo gears should I buy?

    Speedometer Gear Selection

    Older vehicles use mechanical speedometers. They have 2 gears that work together to measure vehicle speed. These “Speedo Gears” are usually located in the transmission. The Drive Gear is located on the output shaft. The Driven Gear is located in...

  169. Ford 4 Speed (Overdrive) Transmission Dimensions

    AOD and AODE Transmissions Measurements

    AOD Bellhousing pattern - Small Block   StyleABCDESmall Block30 3/8 in.20 3/16 in.22 5/16 in.5 5/16 in.19 9/16 in. AODE Bellhousing pattern - Small Block   StyleABCDESmall Block31 3/16 in.21 in.23 5/16 in.5 5/16 in.19 3/8 in.  ...

  170. Chrysler 4 Speed (Overdrive) Transmission Dimensions

    A-518 and A-500 Transmission Measurements

    **Dimension "C" is the distance from the bellhousing to the center of the transmission mounting pad. The mount is usually part of the extension housing. The image shows it as part of the main housing. In reality, Dimension "C" is longer than Dimen...

  171. Intro to the LY2, L20, LY5, LMG, and LMF

    LS Family = Gen. 4, 4.8L / 5.3L, Iron Block, Truck Engines

    LY2 The LY2 was introduced in 2007. It replaced the LR4 as the Vortec 4800. It was available in GM pickups, vans, and SUVs until 2009. L20 The L20 replaced the LY2 in 2010. It was upgraded with Variable Valve Timing (VVT) and Flex Fuel techn...

  172. Intro to the LY6 and L96

    LS Family: Gen. 4, 6.0L, Iron Block, Truck Engines

    LY6 The LY6 was introduced in 2007. It replaced the LQ4 and LQ9 as the Vortec 6000. Along with the LY2, LY5, and LMG, it was one of the first 4th generation, LS truck engines. The LY6 used Variable Valve Timing (VVT). This helped it make more...

  173. Intro to the L92, L9H, and L94

    LS Family: Gen. 4, 6.2L, Aluminum Block, Truck Engines

    L92 The L92 was introduced in 2007 for GM luxury pickups and SUVs. It was the first 6.2L LS truck engine. It was commonly known as the Vortec 6200. L9H The L9H replaced the L92 in 2009. It was upgraded with Flex Fuel capability. The L9H was also ...

  174. Intro to the LH6, LC9, LH8, and LH9

    LS Family: Gen. 4, 5.3L, Aluminum Block, Truck Engines

    LH6 The LH6 replaced the LM4 in 2005. It was the first Gen. 4 LS truck engine and offered Active Fuel Management (AFM). The LH6 was available in GM mid-size SUVs until 2009. It was also available in GM pickups from 2007-09. It was known as the Vort...

  175. Intro to the LS2, L76, LFA, and LZ1

    LS Family = Gen. 4, 6.0L, Aluminum Block, Truck Engines

    LS2 The LS2 (VIN code H) was introduced in 2005 for the Chevy SSR. It was available in the SSR through 2006. It was also available in the Trailblazer SS and Saab 9-7X Aero until 2009. L76 The L76 was an adapted version of the LS2. It used LS3-sty...

  176. Intro to the LS2, L76, and L77

    LS Family = Gen. 4, 6.0L, Aluminum Block, Car Engines

    LS2 The LS2 (VIN code U) replaced the LS1 in the Corvette in 2005. It used the new Gen. 4 block and the cathedral port heads from the LS6. The LS2 added more ​Displacement​ and better heads for more ​Horsepower​ and ​Torque​ . The LS2 was ava...

  177. How do I use an SPST relay?

    Wiring examples for the standard 4-pin relay

    Follow this link for information on The Different Types of Relays and how they work. You can think of a Relay as a remote-controlled switch where a low-amperage signal controls a high-amperage output. Pin 30 is the high-amperage input.When a positiv...

  178. Intro to the LS3 and L99

    LS Family = Gen. 4, 6.2L, Aluminum Block, Car Engines

    LS3 The LS3 replaced the LS2 in the Corvette in 2008. It added more Displacement and rectangle port heads for more Horsepower and Torque . The LS3 was available in GM performance cars until 2017. L99 The L99 was an adapted version of the LS3. It ...

  179. What’s the difference between internal and external engine balance?

    Engine Balance: Internal vs. External

    An engine must be balanced to ensure smooth operation. It minimizes vibration and maximizes engine life. Balancing can be internal, external, or a combination of both. Balancing an engine means offsetting the weight of the pistons and rods. This in...

  180. Chevy LS4 Engine Specs

    LS Family: Gen. 4, 5.3L, Aluminum Block, Car Engines

    The LS4 was used in GM cars between 2005-09. It is unique because it was the only LS engine used in FWD vehicles. To make this engine work, GM made several modifications to the engine: The engine was mounted in a transverse position, using ...

  181. Chevy LS7 Engine Specs

    LS Family: Gen. 4, 7.0L, Aluminum Block, Car Engines

    The LS7 is the largest engine in the LS family. It is unique because it was based on the C5-R Le Mans Corvette racing engine. It was purpose-built for high-performance. The LS7 was available in performance cars between 2006-15. Top End Features ...

  182. Intro to the LS9 and LSA

    LS Family: Gen. 4, 6.2L, Aluminum Block, Supercharged Engines

    LS9 The LS9 was introduced in 2009 for the ZR1 Corvette. At the time, it was the most powerful engine ever produced by GM. It featured a 2.3L roots blower and made 638 hp. The heads, block, and internals were all upgraded for strength. It also use...

  183. I don't know the VIN. Which LS engine do I have?

    Identify Chevy LS Engines by Inspection

    Before you begin any project, you need to know the starting point. When it comes to Chevrolet's 3rd and 4th generation small blocks, there can be a lot of confusion. There are more than 40 variations of these engines. The similarities between them m...

  184. LS Engine Tech – Active Fuel Management (AFM)

    Overview of the Chevy AFM System

    The purpose of Active Fuel Management (AFM) is to improve gas mileage. It is also known as Displacement on Demand (DOD) or cylinder deactivation. **The table below shows the engines that were originally equipped with AFM.** Displacem...

  185. LS Engine Tech - Variable Valve Timing (VVT)

    Overview of the Chevy VVT System

    Variable Valve Timing (VVT) is a system that automatically adjusts Valve Timing. **The table below shows the engines that were originally equipped with VVT.** Displacement RPO Code 4.8L L20 ...

  186. Can I use an older GM automatic transmission with an LS engine?

    Mating a GM Automatic Transmission to an LS Engine

    Application Details Any Chevy LS engine, EXCEPT the LS4 and some early LQ4 and LR4 engines. The LS4 was used in FWD cars and uses a metric, 60 degree, Chevrolet V6 bellhousing. For details about the LQ4 and LR4 engines, see Mating ...

  187. I have an early LS engine with a long crank. What do I need to bolt-up my old GM automatic?

    Mating a GM Automatic Transmission to an Early LQ4 or LR4

    Application Details Engines 1999-2000 Chevy LQ4, 6.0L engine (VIN Code U), originally mounted to a 4L80E transmission 1999-2000 Chevy LR4, 4.8L engine (VIN Code V), originally mounted to a manual transmission Transmissions Po...

  188. I know my VIN. Which LT engine do I have?

    Identify a Chevy LT Engine (Gen. 5) by VIN

    Chevrolet's 5th generation small block engines can be called different names. The car engines are usually known by the RPO code, which starts with the letters "LT". The truck engines are usually known as the "EcoTec3". The best way to determine whi...

  189. What is engine quench?

    Definition and Description

    Quench is the distance between the top of the piston at TDC and the cylinder head surface. It is also called "Squish" or "Piston-to-Head Clearance." How is it measured? Quench is a calculated dimension. It uses the following formula: Quench = D...

  190. How do I lock my rocker arms?

    Polylock Adjustment Procedure

    Follow the steps below to adjust your Polylocks. Procedure Set the Valve Lash or Lifter Preload by turning the outer hex nut (polylock body). Loosen the outer hex nut approx. 1/16 of a turn. Tighten the set screw. Tighten BOTH the screw and n...

  191. Where should I set my ignition timing for the first start-up?

    Distributor Installation on a New or Rebuilt Engine

    The following is a general procedure that works well for most engines. If you recieved specific instructions from your engine bulider, please follow them. Preliminary Steps If it's not already done, complete these steps before installing the distr...

  192. How do I get a copy of the instructions?

    View or Download Instructions Sheets

    When instructions are available online, you can find them on the part detail page. How do I do it? Find the part you want. Scroll down the page and click the "Instructions" Icon. Clicking on "Instructions & Calculators" on the far...

  193. What does A body, B body, F body (etc.) mean?

    A Guide to GM Body Codes

    General Motors (GM) uses letters to identify the body styles of different vehicles. For example, an A-body may be a 1955 Chevy Bel Air, a 1964 Oldsmobile F-85, or a 1981 Buick Regal. We've put together some charts to help explain these body codes. T...

  194. What is my engine's firing order?

    V8 Cylinder Numbering, Firing Order and Distributor Rotation by Engine Type

    If you're doing a tune up or installing a new cam, you will need to know this. Different manufacturers number the cylinders differently. They also fire in a different sequence. We have the firing order for many popular V8 engines. Please click ...

  195. How do I prep my engine for a supercharger?

    Basic Guide to Supercharging

    There are two common misconceptions about blowers: First, it is exotic and found only on wild street machines or racecars. Second, it is difficult to drive on an everyday basis. These are both incorrect. A supercharger is nothing more than a large ...

  196. What is Engine Bore Diameter?

    Definition and Description

    Cylinder bore diameter is the measurement across the inside of the bore. It can be listed in either inches or millimeters. How is it measured? The best way to measure bore diameter is with a Dial Bore Gauge. If your block needs machined, the sh...

  197. Engine Displacement

    Definition and Description

    Displacement is the size of the engine. It is the total Swept Volume of all its cylinders. It tells you how much air can be pumped through the engine. Engine displacement can be listed in cubic inches (c.i.d.), cubic centimeters (cc), or liter...

  198. What is an Engines Stroke Length?

    Definition and Description

    An engine's stroke is the distance the piston travels inside the cylinder. Stroke length is determined by the crankshaft. It can be listed in either inches or millimeters. How is it measured? The best way to find the stroke length is to: Iden...

  199. What is Engine Deck Clearance?

    Definition and Description

    Deck clearance is the distance between the piston deck at TDC and the deck surface of the engine block. Negative Clearance: The piston protrudes slightly from the deck surface. Positive Clearance: The piston sits a bit inside the cylinder bore. ...

  200. What is Piston Head Volume?

    Definition and Description

    Pistons are available with different head volumes. This is the size of the top of the piston. It is listed in cubic centimeters (cc). We list the head volume in the way it affects the size of the combustion chamber. This helps w...

  201. What is Combustion Chamber Volume?

    Definition and Description

    Combustion chamber volume is the size of the chamber in the head, where the valves are located. It is measured in cubic centimeters (cc). How is it measured? For aftermarket heads, the easiest way to find the chamber volume is to look it up online...

  202. What does the gasoline octane rating mean?

    Definition and Description

    The octane rating measures the performance of the fuel. The higher the number, the more compression it can withstand before self-igniting. How is it measured? Gasoline is a mixture of various chemicals. A sample of the fuel blend is run in a test ...

  203. What is Engine Detonation?

    Definition and Description

    Detonation is spontaneous combustion inside the cylinder AFTER the spark plug fires. It is similar to Pre-Ignition, but it is different. During normal ignition, the spark plug fires just before the piston reaches TDC. The flame travels ac...

  204. What is Engine Pre-Ignition?

    Definition and Description

    Pre-ignition is combustion inside the cylinder BEFORE the spark plug fires. It is similar to Detonation, but it is different. When pre-ignition happens, something ignites the ​Air/Fuel Mixture​ during the Compression Stroke. This creates too m...

  205. Engine Horsepower

    Definition and Description

    Horsepower (hp) is a unit of measurement that expresses the rate at which work is done. 1 hp represents the amount of power it takes to perform 33,000 ft.-lbs. of work in 1 minute. Imagine a horse pulling coal out of a mine. A horse exer...

  206. What is Engine Torque?

    Definition and Description

    Torque is a unit of measurement that expresses the amount of work done. It can be listed in foot-pounds, Newton meters, or Joules. For example, imagine using a wrench with a 2 ft. handle. You apply 50 lbs. of force to the handle. You are ...

  207. Deck Height

    Definition and Description

    Engine block deck height is the distance from the centerline of the main bearing bore to the flat surface of the block where the heads bolt on. How is it measured? The easiest and most accurate method is to have it measured by a machine shop. To ...

  208. What is Piston Compression Height?

    Definition and Description

    Compression height is the distance from the center of the wrist pin to the crown of the piston. It is listed in inches and provided by the piston manufacturer. When building a performance engine, the piston is usually chosen for its Head Sty...

  209. What are the differnt Piston Styles?

    A Basic Overview

    Piston design impacts how the ignition flame travels, the quality of airflow, fuel distribution, and more. The style you choose is usually based on valve clearance and compression requirements. Flat Top Pistons This piston has a flat top...

  210. How to determine a wheel stud size.

    Definition and Description

    Stud sizes are expressed as: (Diameter of the Stud) x (Thread Count) for US fasteners OR (Diameter of the Stud) x (Thread Pitch) for metric fasteners Thread Count specifies how many threads per inch. A stud size of 1/2-20 is 1/2 inch in ...

  211. What are the Lug Nut Seat Types?

    Overview of Lug Nut Seat Styles

    It is very important that you match the lug nut seat to the wheel seat. If you use the wrong ones, the wheel will not be seated or centered properly on the axle. This could cause vibration, loosening of the lug nuts, and damage to your vehicle. A c...

  212. What's a "Universal" part?

    Definition and Description

    The term “universal” is used when a part is not vehicle-specific. This means it was not designed to fit one or a select few vehicles. Universal does NOT mean the part will fit any vehicle. In most cases, one or more of the following will be require...

  213. What is Connecting Rod Length?

    Definition and Description

    A Connecting Rod is measured between the centers of the crankshaft journal bore and the piston pin bore. It can be listed in inches or millimeters. The connecting rod’s length will impact Rod Ratio . Also, changing the rod len...

  214. What is rod ratio?

    Definition and Description

    Rod ratio is the relationship between the Connecting Rod Length and the Stroke Length of the crankshaft. How is it calculated? Use the following formula to calculate rod ratio: Rod Length ÷ Stroke Length = Rod Ratio For example, a...

  215. What is brake pedal ratio?

    Definition and Description

    Pedal ratio is an important but often overlooked part of your braking system. It tells you how the force you apply to the pedal is multiplied and transferred to the Master Cylinder. It also affects how far the pedal travels. Why is it importan...

  216. How do I count the teeth on my speedo gears?

    Tips and Tricks

    Don’t try and count the ridges on the face of the gear. Look at the gear from the side. Mark the tooth where you start. Count the peaks all the way around the gear. In the picture below, each red dot is 1 tooth. **The gear pictured a...

  217. How do I find my tire diameter?

    Measurement, Calculation and Instructions

    Tire diameter affects many aspects of your vehicle’s performance. It plays a role in: Speedometer Gears , Engine RPM at 60 mph , Plus Sizing , Rollout , Gear Ratio Calculations, Etc. There are several ways you can get the diameter number y...

  218. What's the difference between a 302 and a 351W?

    Identifying a Ford Windsor Block by Inspection

    History Ford produced the small block Windsor family of engines from 1961-2000. There were many variations available throughout the years. Visual Difference The main difference between the blocks was the Deck Height . The 351 blocks were as much ...

  219. What's the difference between a Cleveland and a Modified engine?

    Ford 351 Cleveland vs. 351/400 Modified

    History The "Cleveland" and "Modified" engines are all part of the "335 Series" engine family. Ford built the 351C engine between 1969-74. They also built the 400 c.i.d. engine, starting in 1971. The 351C was replaced by the 351M in 1975. The 351M...

  220. Which battery should I buy?

    Basic Overview of Automotive Batteries

    The Battery is the heart of your vehicle’s electrical systems. It provides the current that starts the engine, powers the electronics, and fires the ignition system. Just like anything else, choosing the right battery for your application will en...

  221. What's the difference between a starting battery and a deep cycle battery?

    Battery Usage - Starting vs. Deep Cycle

    Starting Batteries Starting Batteries are often used for daily drivers. They deliver one large burst of power to start a normal engine. This discharges about 1-3% of its power. Once the engine has started, the alternator maintains power and recharg...

  222. What is a wet cell battery?

    Definition and Description

    A Wet Cell (or "flooded cell") Battery is a standard, traditional type of battery. It contains liquid electrolyte that may require maintenance. There are two styles of wet cell batteries. Serviceable wet cells have removable caps that allow electrol...

  223. What is a gel cell battery?

    Definition and Description

    A Gel Cell Battery contains electrolyte with a silica additive. This causes it to stiffen or set up, like a gel. What are the benefits? The silica gel suspends the electrolyte in a paste. This prevents spilling if the battery is not upright. What...

  224. What is a BCI number?

    BCI Group Number Table

    The Battery Council International (BCI) has developed group numbers that categorize batteries by size. Each number refers to the physical dimensions of the case. It also tells you the type and location of the terminals. BCI Application ...

  225. Battery Reserve Capacity

    Definition and Description

    Reserve capacity is the time (in minutes) that a fully charged battery will deliver 25 amps at 80ºF and maintain a terminal voltage of 1.75+ volts per cell. How is it measured? Manufacturers test batteries to determine their reserve capacity. This...

  226. What spark plugs should I buy?

    Basic Overview of Automotive Spark Plugs

    For most applications, we recommend the same Spark Plugs as the manufacturer. Slightly different plugs will not increase performance much... if at all. Significantly different plugs could do more harm than good. A spark plug has 3 main jobs: Ign...

  227. Spark Plug Gap

    Definition and Description

    Spark plug gap (or "air gap") is the distance between the center electrode and the ground electrode. This is the gap the voltage jumps to create the spark. How is it measured? There are Several Tools to use with spark plug gap. Some are designed...

  228. Do you have torque specs for my engine?

    Assembly Torque Specs by Engine

    We have torque specs for many popular engines. Just click one of the links below for more information. Chevrolet Gen. 1 Small Block Gen. IV, Mark V Big Block LS Based Engines Gen. 3, Aluminum Block (LS1, LS6, Etc.) Gen. 3, Iron Block (LM...

  229. How does an ignition coil work?

    The Process of Induction

    An Ignition Coil is an electrical transformer. It converts low voltage to high voltage through a process called induction. There are various designs, but all ignition coils do the same basic job. Parts of the Coil An ignition coil is made up of an...

  230. What is ignition timing?

    The Basics of Ignition Timing

    Ignition timing (or spark timing) controls when the spark plug fires during the Compression Stroke. Ignition timing is measured in degrees of crankshaft rotation, before top dead center (BTDC). In a perfect world, The spark plug fires. The flam...

  231. What is BSFC?

    Definition & Description

    BSFC stands for Brake Specific Fuel Consumption. It tells you how much fuel your engine will use per hour for each horsepower it makes. BSFC changes with engine load and rpm. A lower BSFC value is MORE efficient. Higher BSFC numbers are LESS effici...

  232. What is a brake combination valve?

    Definition & Description

    A Brake Combination Valve is exactly what it sounds like. It is a single unit that performs multiple functions. Its job is to achieve Balanced Braking. Combination valves are often just called “proportioning valves.” However, in reality, they do mo...

  233. What is total timing?

    Definition & Description

    The term "Total Timing" refers to the maximum amount of Ignition Timing applied to the engine. How is it calculated? Total Timing = Initial Timing + Mechanical Advance How is it set? Determine your desired total timing. (See below for basic gu...

  234. What is initial timing?

    Definition & Description

    The term "Initial Timing" refers to the amount of Ignition Timing applied to the engine at idle. How is it set? Initial timing is set by the position the distributor is in when bolted down. For the proper procedure, follow this link to our arti...

  235. What is a brake metering valve?

    Definition & Description

    A brake metering valve is used to Balance the Braking Forces. It is only found on vehicles with front disc and rear drum brakes. The metering valve holds back fluid to the front brakes until enough pressure is created to overcome the return springs ...

  236. What is ground-in advance?

    Definition & Description

    Some camshafts are designed with "ground-in" advance. When you Install the Camshaft per the instructions, the Intake Opening Event is automatically advanced. This feature is built in and cannot be undone. Do I have it? To determine if a camshaft h...

  237. What is rocker arm ratio?

    Definition & Description

    The rocker arm ratio is the relationship between the 2 halves of the rocker arm. The halves are: The center of the valve stem to the center of the pivot point. (Dimension “Y” in the diagram.) The center of the pushrod to the center of the pivot ...

  238. What is a stud mount rocker arm?

    Definition & Description

    A Stud Mount Rocker Arm is secured to the cylinder head by a stud. The studs can be screwed in or pressed in. The rocker slides over it. Then, it's held in place by a locking nut. (Non-roller rockers also require a fulcrum as a pivot point.) What...

  239. What is a pedestal mount rocker arm?

    Definition & Description

    A Pedestal Mount Rocker Arm has a pivot point that is bolted to the cylinder head. In some cases, the head may have a pedestal machined into it. In other cases, the pedestal is a separate piece. What engines use them? Pedestal mount rockers were...

  240. What is a polylock?

    Definition & Description

    A Polylock is an adjustable rocker arm nut. They are used with Stud Mount Rocker Arms. How do they work? A polylock features a threaded body and a set screw. The body screws over the stud and holds the rocker arm in place. Then, the set screw i...

  241. What does A body, B body, E body (etc.) mean?

    A Guide to Mopar Body Codes

    Chrysler uses letters to identify the body styles of different vehicles. For example, an A-body may be a 1963 Dodge Dart or a 1974 Plymouth Duster. We've put together some charts to help explain these body codes. They are organized by year range. ...

  242. How do I break in my new headers?

    Curing Coated Headers

    Most ceramic coated headers will come partially cured. The following break-in procedure will help to fully cure the coating. The same procedure will also help freshly painted headers. Procedure Install the headers according to the manufacturer’s...

  243. What is a TTY bolt?

    Overview of Torque to Yield (TTY) Fasteners

    Torque to Yield (TTY) fasteners are used in many modern engines. When torqued properly, they provide better clamping force than standard fasteners. All TTY bolts are 1-time use only. However, some rod bolts and main cap bolts can be tightened up to...

  244. What is the difference between 1st and 2nd design rod bolts?

    LS Connecting Rod Bolts: First Design vs. Second Design

    Between 1997 and 1999, GM used 2 different types of Connecting Rod Bolts. Each have different torque specs, so it’s important to know the difference. What engines used them? The rod bolts were used at different times. The following engines may hav...

  245. How do I install my LS cylinder heads?

    Installation Procedure, Torque Specs and Sequence

    To properly install your LS Cylinder Heads, follow the steps below. This will prevent oil and coolant leaks and a loss of compression from a blown head gasket. **If you use aftermarket bolts or studs, follow the instructions that came with your new...

  246. How do I install my LS intake manifold?

    Installation Procedure, Torque Specs and Sequence

    To properly install your LS Intake Manifold, follow the steps below. This will ensure a good seal to the cylinder head. A properly sealed intake will prevent vacuum leaks and provide the best performance. **For aftermarket manifolds, please follow ...

  247. How is Electronic Fuel Injection (EFI) Controlled?

    EFI Controls and Sensors

    EFI uses sensors to determine how much fuel is needed at any given moment. Every EFI system will have some combination of the following parts. Electronic Control Unit (ECU) The ECU is the brain of the operation. It uses engine RPM and signals from...

  248. How do I fine-tune my fuel injector flow rate?

    The Effect of Fuel Pressure on Injector Flow Rate

    Fuel Injector flow rate changes slightly with fuel pressure. As pressure goes up so does the amount of fuel that can pass through the open injector. Getting the right amount of fuel could be as simple as a pressure regulator adjustment. Most inject...

  249. What is Intake Runner Volume?

    Definition and Description

    Intake runner volume is a popular way to compare cylinder heads. It tells you the size of the passage leading to the intake valve. It is expressed in cubic centimeters (cc). How is it measured? For aftermarket heads, the easiest way to find the in...

  250. How do I cc my cylinder head?

    Measuring Procedure for Combustion Chamber, Intake Runner, Etc.

    If you machine or port and polish your Cylinder Heads, you need to measure them. The Combustion Chamber Volumes should all be equal. The Intake Runners need to  match each other too. The same goes for the Exhaust Runners. This will ensure consi...

  251. Exhaust Runner Volume

    Definition & Description

    Exhaust runner volume tells you the size of the passage from the exhaust valve to the manifold mating flange. It is expressed in cubic centimeters (cc). How is it measured? For aftermarket heads, the easiest way to find the runner size is to look ...

  252. What is a fuel map?

    How EFI Calculates Fuel Delivery Needs

    A fuel map is the combination of everything an ECU knows about engine running conditions. The goal of a fuel map is to use this information to provide the right amount of fuel. It does this by controlling fuel injector pulse width. Pulse width (PW) ...

  253. Engine Basics - Air/Fuel Mixture

    The Basics of Air/Fuel Ratio, Stoichiometry, and Lambda

    An engine needs air, fuel, and Spark to make power. To optimize your engine’s performance, you need the right mixture of air and fuel. Air/Fuel Ratio (AFR) AFR stands for air to fuel ratio. Fuel doesn't burn on its own. It has to be mixed with air...

  254. What fuel pressure should I run with my new carb?

    Carburetor Fuel Pressure by Manufacturer

    Each style of carburetor has a fuel pressure range where they perform the best. The owners manual that came with your carb will give you set-up and tuning instructions. However, you can use the table below as a basic guideline. Carburetor ...

  255. Crankcase Ventilation

    System Description, Benefits, and Alternatives

    The crankcase ventilation system is more important than people know. When there’s a problem, it can cause oil sludge build-up, oil leaks, and oil consumption. Most engines have the following problems: Churning oil creates pressure. Piston rings...

  256. What does the PCV valve do?

    Definition & Description

    A PCV Valve regulates positive crankcase ventilation. It is an important part of your Crankcase Ventilation System. What does it do? The PCV valve serves a few purposes: It stops excessive amounts of oil from being drawn out of the crankcase. ...

  257. What does "metering style" mean?

    Speed Density vs. Mass Airflow vs. Alpha-N

    Metering style is the strategy the ECU uses to measure airflow and calculate fuel requirements. A Fuel Injection System compares airflow, engine rpm, and other sensor information in the Fuel Map. It uses that information to determine how much fuel i...

  258. Which style manifold is better?

    Single Plane vs. Dual Plane Intake Manifolds

    Most Intake Manifolds for Carbureted Engines are either “single plane” or “dual plane”. Both designs work well when matched with the right combination of parts. The best choice for you depends on the rpm range where your engine spends the most time....

  259. Can I run E85?

    The Basics of Switching to Ethanol

    You've seen cars making huge power on E85. However, you can’t just switch fuel. That would make your car run worse. It could also cause damage. How does it make more power? E85 contains less energy per gallon than gasoline. But, an engine designed...

  260. What is the difference between pump gas and other alternative fuels?

    Pump Gas vs. Race Gas vs. Ethanol vs. E85 vs. Methanol

    There are a number of fuels for gas engines today. Keep reading to learn more about their differences. Pump Gas/Gasoline Pump gas is a standard fuel distilled from petroleum. It has additives that help lubricate, clean and increase octane. One of...

  261. What is a throttle body spacer?

    Definition & Description

    A Throttle Body Spacer is an easy way to increase Horsepower, Torque, and fuel economy. The spacer installs between the throttle body and intake manifold. It is typically about 1 in. thick and made from aluminum or nylon. It can also be smooth on th...

  262. What’s the difference between a fuel tank and a fuel cell?

    Definition & Description

    A fuel tank and a fuel cell are both designed to hold fuel. But, they are intended for different uses. Fuel Tanks A Fuel Tank is intended for your average street vehicle. Most tanks are made of stamped steel or molded plastic. Fuel tanks are usu...

  263. What is fuel cell foam?

    Definition & Description

    Fuel Cell Foam is a special, sponge-like material that is installed inside a racing fuel cell. The foam is mostly air, so it doesn’t reduce the capacity of the cell. However, it provides a few key benefits: It reduces sloshing. This reduce...

  264. What is vapor lock?

    Definition & Description

    Vapor lock occurs when liquid fuel turns to vapor before it gets to the carburetor or fuel rail. This is a problem because pumps designed for liquid do not pump vapor very well. Vapor lock causes: Loss of fuel pressure (and flow)Loss of powerStallin...

  265. What is a return style fuel pressure regulator?

    Definition & Description

    Return Style Regulators are a common choice for a performance fuel system. These regulators are also called “bypass” regulators. How does it work? Fuel from the pump enters the inlet. It flows past the “bypass valve,” which is held closed by a s...

  266. Which shock / strut design is better?

    Monotube vs. Twin-Tube Absorbers

    Shocks and Struts absorb the up and down motion of the wheel as it travels over the road. This makes for a more comfortable ride. They also make the vehicle safer. When they work properly, they improve both handling and braking. There are a few thi...

  267. What is a twin-tube shock?

    Definition & Description

    Twin-Tube Shocks and Struts are common on most OEM vehicles. They make for a safe and comfortable ride. How are they designed? A twin-tube absorber has an inner and outer cylinder. The inner tube is filled with oil. The piston rod is attached to t...

  268. What is a monotube shock?

    Definition & Description

    Monotube Shocks and Struts are a common suspension upgrade. They can improve vehicle handling and braking. They are used on all types of race cars, off-road rigs, and performance street vehicles. How are they designed? In a monotube absorber, all ...

  269. What is a ball joint?

    Definition & Description

    A Ball Joint is the pivot point between the control arm and the spindle or steering knuckle. Most ball joints are made up of: A tapered shaft, threaded on one end with a ball on the other end A socket that holds the ball Usually, a rubber bo...

  270. How do I check my ball joints?

    Inspection Procedures

    Most Ball Joints last a long time, sometimes 80,000 – 100,000 miles. Driving on bumpy, winding roads will wear them faster. Inspect your ball joints when you notice any of the following: Clunking noises when you go over bumps Squeaking when the ...

  271. What is a wheel alignment?

    The Basics

    An alignment is the process of measuring and adjusting several complex suspension angles. On most vehicles, this includes the Caster Angles, Camber Angles, and Toe Angles. Simply put, an alignment makes sure your wheels are pointed in the right dire...

  272. What is caster?

    Definition & Description

    The caster angle is the slope of the imaginary line that intersects the upper and lower steering pivot points, viewed from the side. (This could be the upper and lower ball joints or the lower ball joint and the strut.) The caster angle is expres...

  273. What is camber?

    Definition & Description

    The camber angle is the slope of the imaginary line that runs vertically through the center of the tire, viewed from the front or back of the vehicle. It tells you if the tire leans in or out. The camber angle is expressed in degrees. It can be p...

  274. What is toe?

    Definition & Description

    The toe angle is the direction the tires are pointed, in relation to the vehicle centerline, viewed from above. Toe angle can be expressed in degrees or fractions of an inch. If the tires point inward, the angle is positive. This is also called “...

  275. What is the thrust angle?

    Definition & Description

    The thrust angle is the imaginary line that is 90 degrees from the rear axle center line. It compares the direction the axle is pointed to the center line of the vehicle. Why is it important? For street vehicles, the thrust angle must be aligned...

  276. What is cross camber or cross caster?

    Definition and Description

    The terms “cross camber” and “cross caster” refer to Alignment settings that vary from side to side. Most modern vehicles call for Caster and Camber angles that differ slightly on the right side, compared to the left. For vehicles that drive on the...

  277. What’s the difference between shocks, struts, and coilovers?

    Definitions and Descriptions

    The terms Shocks and Struts are pretty much interchangeable today. It used to be that full-frame vehicles used shocks and unibody vehicles used struts. With modern suspension design, that is no longer the rule. All of these parts absorb energy from...

  278. What is a catalytic converter?

    Definition & Description

    A Catalytic Converter is a device that cleans the vehicle’s exhaust. It can also be called a “cat” or just a “converter.” The cat is installed between the manifold or headers and the muffler. It has a metal case filled with ceramic honeycomb. Thi...

  279. What are the different types of electric relays?

    Relay Terms & Schematics Explained

    An Electric Relay is a high amperage switch controlled with a small electrical input. Normally the small input controls an electromagnetic coil. This coil moves a set of contacts that can handle from 10-200 amps. Relays are usually printed with vol...

  280. Is a plastic or metal intake tube better?

    Air Intake Tube Materials

    Air Intake Kits are a popular performance upgrade. They are affordable, easy to install, and provide noticeable gains over a stock intake. However, there are lots of choices. One thing that can be different between kits is the tube. Metal Tubes ...

  281. What is a tunnel ram?

    Definition & Description

    A Tunnel Ram is a special type of intake manifold. They became popular with drag racers in the 1960s. Today, they can be found on all types of cars and trucks. Technically, a tunnel ram is a Single Plane Manifold. However, it is unique enough for...

  282. What is a K-member?

    Definition & Description

    The K-Member is a removable, structural part of the chassis. It attaches to the frame rails and passes under the engine. The K-member is the mounting point for most of the front suspension. It also has mounting points for the Motor Mounts and Stee...

  283. Body-on-Frame vs. Unibody Construction

    Definition & Description of Frame Styles

    Most vehicles are built using either “body-on-frame” or “unibody” design. The terms refer to the style of the vehicle chassis (or frame).The chassis is like the skeleton of the vehicle. It supports the engine, drivetrain, suspension, and passenger c...

  284. What type of cooling fan should I use?

    Mechanical vs. Electric Fans

    Increased power generates more heat. The type of fan you use can keep your engine cool. It can also free up a few extra horses! The engine cooling fan needs to be “turned on and off” for the system to function properly. Different types of fans are ...

  285. How does a fan clutch work?

    Clutch Style Definitions & Descriptions

    The Fan Clutch is an important part of your cooling system. Its drive shaft attaches to the water pump. Then, the fan attaches to the clutch housing. The fan clutch’s job is to control when the fan comes on and off. It provides airflow when needed....

  286. How do I wire my EFI kit?

    Tips For Hooking Up Your ECU

    Connecting the wires is an important step in getting your Electronic Fuel Injection System or Engine Management System up and running. Following these guidelines will prevent headaches when installing and tuning your EFI. Mounting the ECU Some kit...

  287. What size fan spacer do I need?

    Correct Positioning of a Belt-Driven Cooling Fan

    When replacing a Recommended Minimum Clearances For best performance, follow these guidelines: About half the depth of the blade should be inside the fan shroud. The forward edge of the fan blades should be at least 1 in. from the radiator....

  288. Can I remove my fan shroud?

    The Function of the Fan Shroud

    It might seem like it just gets in the way. But the Fan Shroud plays an important role in the cooling system. Removing the shroud is not recommended. In fact, if you don’t have one or yours is damaged: Repair It Replace It Fabricate a New One...

  289. Crossflow vs. Downflow Radiators

    Cooling Basics - Radiator Type

    An Automotive Radiator falls into one of 2 basic categories. The difference is the direction the coolant travels across the radiator core. How do they work? A Downflow Radiator is used in many older vehicles. In this design, the tanks are horizont...

  290. What is a “double pass” radiator?

    Single vs. Double & Triple Pass Radiators

    In a single pass radiator, coolant only crosses the radiator core one time. Fluid enters the inlet. It flows across the core in tubes. It is collected in the opposite side tank. It exits the outlet and flows through the system again. Singl...

  291. Why is the cooling system under pressure?

    Cooling Basics - The Radiator Cap

    The Radiator Cap keeps the cooling system under pressure. It is also the system's safety valve. It allows the pressure to escape if it gets too high. Why is it so important? As the coolant warms up, it expands. This creates pressure in...

  292. Is a 3-row radiator better than a 2-row?

    Cooling Basics - Row Quantity vs. Tube Size

    In the radiator core, coolant flows through tubes. The tubes are joined together by the fins. The more tube-to-fin contact area; the more heat can be exchanged. One way to increase the contact area is to use more tubes. This is accomplished by addi...

  293. What type of radiator should I get?

    Radiator Buying Guide

    When it comes to selecting a New Radiator, there are a lot of choices. So, how do you get the right one? It really depends on the engine you are trying to cool. Stock & Mildly Modified Engines For most street vehicles, an OEM Replacement Rad...

  294. What does the thermostat do?

    Cooling Basics - Thermostat Function

    In a liquid cooled engine, the Thermostat is a valve installed between the water pump and the radiator. It controls when the radiator starts to cool the engine. It’s job is to help the engine reach operating temperature quickly. How does it work?...

  295. Should I run a colder thermostat?

    Selecting the Right Thermostat Opening Temperature

    If you hang around car guys long enough, you will hear that a colder thermostat will help you make more power. However, a low-temp thermostat by itself does not make power. In some circumstances, a colder thermostat can help the engine make more po...

  296. Why do I need to use antifreeze?

    Cooling Basics - The Fluid

    The fluid you use in your engine’s cooling system can affect its performance. For most vehicles, a 50/50 mixture of Antifreeze and water is recommended. Why? In a perfect world, we would use pure distilled water. Water is an excellent cooling agen...

  297. Should I use a high-pressure radiator cap?

    Cooling System Pressure, Coolant Mixture, and Boiling Point

    High-pressure Radiator Caps have a specific purpose. However, let’s start with what they DON’T do. High-pressure caps will not solve overheating problems. For overheating problems, troubleshoot and/or upgrade these parts first: Radiator Cooling...

  298. What does “SFI Approved” mean?

    Safety Certified Racing Parts

    Parts that carry an SFI approval are certified to be safe for racing. This means they are designed and tested to meet certain safety requirements. The requirements are established by The SFI Foundation, Inc. What is the SFI Foundation? The SFI Fou...

  299. Does an SFI certification expire?

    SFI Dates & Our Policy

    Some SFI Approvals do have an expiration date. Time-limited parts will have a label that lists the expiration date. However, this does not mean the product is no longer good after that date. Some products can be inspected and recertified. Which par...

  300. Can I use a fuel injection kit to control ignition timing?

    The Benefits of Computer Controlled Timing

    Most fuel injection kits will work with your existing ignition system. All they really need is a tach signal. Ignition Timing Advance can be handled Mechanically and/or with Vacuum, just like with a carburetor. However, there are advantages to comp...

  301. What is a brake master cylinder?

    Definition & Description

    The Brake Master Cylinder is the heart of the braking system. It converts the force placed on the pedal into hydraulic pressure. Then, the pressure forces fluid through the brake lines and hoses. For power-assisted brakes, the master cylinder is ...

  302. What is a brake booster?

    Definition & Description

    A Brake Booster is a device that increases the force applied from the brake pedal to the master cylinder. The booster is what separates a power-assisted braking system from a manual one. The most common type of brake booster uses Engine Vacuum. H...

  303. What is brake bias?

    Definition & Description

    Brake bias is the percentage of total braking force applied to the front wheels. It can also be called “brake balance.” A 60-70% bias is common on RWD street vehicles. This means the front brakes provide 60-70% of the total braking force. FWD cars ...

  304. What is a residual valve?

    Definition & Description

    A Residual Pressure Valve is a special type of one-way check valve. They are used to keep a small amount of pressure in the brake lines. This helps the brakes engage more quickly and reduces pedal travel. There are 2 basic types of residual valves,...

  305. How do I tune my fuel injection kit?

    The Basics of EFI Self and User Tuning

    Most EFI Kits are designed to be plug-and–play. Just enter some basic information about your engine into the handheld controller and you’re up and running. From there, the system will tune itself as you drive. For many people there’s no reason to go...

  306. What is brake fade?

    Definition, Types, and Causes

    “Brake Fade” is when the braking system fails to slow or stop the vehicle due to overheating in one or more of its parts. (It is not caused by wear or mechanical failure.) This results in unpredictable braking. Brake fade can feel like the pedal is...

  307. What is a vented rotor?

    Solid vs. Vented Brake Rotors

    Brake Rotors are available in 2 basic types, solid or vented. This is known as the “rotor construction.” Vented Rotors Vented Brake Rotors are common on most modern vehicles. They have a hollow channel between the inner and outer surfaces. This ...

  308. Which way do I install my rotors?

    Directional vs. Non-Directional Brake Rotors

    Most replacement Brake Rotors are not directional. They can be installed on either side of the vehicle. However, some performance rotors are meant to spin in a specific direction. If your rotors are directional, they will be marked. It could be a s...

  309. Engine Vacuum

    A Basic Overview

    Vacuum is the difference in air pressure between the inside of the intake manifold and the outside atmosphere. The pressure difference creates suction and helps to draw air into the engine. Engine vacuum is a required condition for a gasoline engine...

  310. Do I need a vacuum pump or canister?

    Power Brakes & Big Cams

    Installing a Performance Camshaft can add a lot of power. However, a common side effect is less vacuum. For vehicles with power brakes, this means a hard pedal, which isn’t fun to drive. Why does this happen? Upgrading the camshaft increases perform...

  311. How do I make sense of a technical data sheet?

    Common Paint and Body Terms Explained

    Some paint terms are pretty straight forward. Others require a little more explanation. Whether you’re reading a Product Data Sheet or choosing different products, these definitions will help you understand what you are looking at. 1K vs 2K 1K produ...

  312. What is ZDDP?

    Definition and Description

    ZDDP stands for zinc dialkyldithiophosphate. It was developed in the 1940’s and was a common and effective additive in engine oil. By the 1990’s, the ZDDP level in most oil was reduced. This was due to the negative effects it has on the Catalytic C...

  313. What sandpaper should I use?

    Sandpaper Recommendations for Paint and Body Work

    Before you paint your car, you’ll need to sand it with a fine sandpaper or the paint won’t stick. You may also need to shape and straighten the surface. These steps will require coarser Sandpapers. Sand scratches from coarse sandpaper must be remove...

  314. What's the difference between sanding grits?

    Sandpaper Ratings Explained

    Sandpaper coarseness is indicated by numbered grits. As the grit numbers get smaller, the sandpaper gets coarser. Coarse sandpaper makes deep scratches. Those deep scratches need to be removed completely by “stepping-up” with gradually finer grits b...

  315. Which helmet safety rating do I need?

    Snell, DOT, SFI, FIA, and ECE

    Racing Helmets are available in many different styles. However, the safety ratings can be confusing. Before you buy a helmet, check the rule book for your track or sanctioning body. Most organizations will specify what type of helmet is required. ...

  316. Which Summit brand heads do I have?

    Summit Racing Cylinder Head Identification

    You may have picked up a set of Our Cylinder Heads from a swap meet. Maybe you bought a used vehicle with a set of our heads already installed. How do you know what they are? Keep reading to learn about the differences and how to tell. Small Block ...

  317. Will this pulley work on my LS engine?

    LS Engine Harmonic Balancers & Accessory Drives

    GM used 3 basic serpentine systems on the LS engines. They all used different spacing to fit inside their original vehicles. Most of the pulleys will bolt onto any LS engine. However, you need to know which one you have to maintain proper belt align...

  318. Will this paint match my car?

    The Causes of Color Variation Explained

    All of our Automotive Spray Paints are made for overall resprays. They don’t match any specific OEM color. We do offer some Touch Up Paint that can be a close match, but a perfect match takes some luck. This is due to variations in color from the fa...

  319. How do I fix a dent?

    An Introduction to Hammer and Dolly Technique

    When a dent is formed, the metal gets stretched severely around the primary impact point making a low spot. This isn’t the only damage. Right around that area there will be a high spot. That metal is also stretched, but in the reverse direction. The...

  320. How do I fix a large dent?

    Metal Straightening Techniques Explained

    Dents can be more complicated than a simple ding. Keep reading to learn how to repair different types of body damage. Where do I start on a big dent? Sometimes you need to get the panel closer to its finished contour before you can finish the meta...

  321. How do I get my body work perfectly straight?

    Sanding Block and Guide Coat Use Explained

    While Orbital and Straight Line sanders are great for removing material quickly, they won’t make your panels straight. Neither will a piece of sandpaper stuck to your hand. It’s also easy to miss a small dent or scratch by feel alone. The secret to...

  322. How do I fix rust?

    Different Repair Methods Explained

    All metals corrode when exposed to oxygen, moisture, and corrosive elements. On metals like brass or aluminum, corrosion forms a thin protective layer which slows the process. Iron and iron alloys act differently. Corrosion of iron is called rust. R...

  323. How do I prep for primer?

    Feather Edging and Priming

    Before you paint your car, you’ll need a smooth uniform surface. Primer is the final step in filling small imperfections and light sand scratches. It has some limitations though. If you put it on thicker than Recommended, it will shrink later. The s...

  324. What do the different knobs do on my paint gun?

    Fan, Fluid, and Air Pressure Adjustment

    Paint guns have adjustments for fluid, fan, and most times air. These adjustments are dependent on each other. The “right” adjustment will be different for every gun and material combination. Fan Adjustment This takes your pattern from a circle ...

  325. How do I adjust my spray gun?

    Putting the Adjustments Together

    You’ll need to spray some test patterns to dial in your Gun Settings. The more you practice, the better. A big piece of cardboard or masking paper works well for this. Start with the fluid and fan adjustments fully open. Make sure to keep t...

  326. How do I lay out a smooth paint job?

    Gun Speed, Angle, and Overlap Explained

    Once you get your Gun Adjustments dialed in, it still takes a consistent spray technique to get a good finished paint job. Gun Angle It’s important to orient the gun perpendicular to the panel. Holding the gun at anything other than a 90-degree an...

  327. What type of fuel lines should I use?

    Metal, Rubber, Braided, or PTFE Lined

    Fuel Lines can be made from many different materials. If you plan to race, be sure to check the rule book for your track or sanctioning body. Using the right material the first time will save you time, money, and headaches. Metal Lines Most cars c...

  328. How do I choose the right fuel filter?

    Micron Ratings and Element Types Explained

    Fuel injectors, carburetors, and electric fuel pumps can be harmed by relatively small particles. To keep your car running at peak performance you need to choose a filter with the right micron rating and element type. Micron Ratings A micron is so...

  329. Basics of Fuel Line Routing

    How do I route fuel lines?

    After choosing Fuel Line Size and What Type of Fuel Lines to Run, you need to safely route them from the tank to the engine. If you plan to race your vehicle, we recommend that you consult the rule book for any race sanctioning body you are particip...

  330. What is the Corvette style fuel system?

    Using the Corvette Style Filter/Regulator

    The Corvette style fuel system uses an after-pump fuel filter as both a filter and a return style regulator. Unlike adjustable Return Style Regulators, the fuel pressure is set at 58 PSI. This fuel system is commonly used with LS swaps. It can also ...

  331. What are the different types of clutch pressure plates?

    The Difference Between Borg and Beck, Long, and Diaphragm Style Pressure Plates Explained

    A clutch pressure plate is the spring-loaded plate bolted to the flywheel that applies pressure to a clutch disc or discs. When you press the clutch pedal, it compresses the pressure plate springs. Once the springs begin to compress, it releases the...

  332. What are the different types of clutch discs?

    Selecting The Right Disc Material and Style

    A clutch disc is a mechanical assembly with friction material on both sides. It connects the engine to the transmission by a splined hub when squeezed between the Pressure Plate and flywheel. Most clutch discs use torsional springs in the splined h...

  333. Mopar EZA Engine Specs

    Early Gen 3 Hemi 5.7L Truck / SUV Engines

    Performance Specifications Compression Ratio 9.6:1 Horsepower Rating 345 hp Torque Rating 375 ft./lbs.     Application Information   VI...

  334. What is a pilot bushing?

    Pilot Bearings and Pilot Bushings Explained

    A pilot bearing or pilot bushing is one of the most important parts of your clutch. Typically pressed in the end of a crankshaft or flywheel, they center and support the input shaft. They also allow for the engine’s crankshaft and the transmission’s...

  335. What kind of flywheel should I use?

    Flywheel Weights Explained

    A flywheel is a heavy metal disc mounted to the crankshaft. It provides the mounting and friction surface for your clutch assembly as well as a gear that engages the starter. The rotational force, or inertia, of its spinning helps to get your car mo...

  336. What's the bore and stroke for a Gen. 3 Hemi engine?

    Gen. 3 Hemi Engine Displacement, Bore and Stroke Chart

    For all Gen. 3 Hemi engines with the same Displacement, the Bore Diameter and Stroke Length are the same. The chart below lists the stock bore and stroke measurements. Engine Size Bore Stroke 5.7L / 345 c.i.d. 3.917 in. ...

  337. Mopar EZC, EZD, EZE, EZH Engine Specs

    Late Gen 3 Hemi 5.7L "Eagle" Truck / Car / SUV Engines

    Performance Specifications Compression Ratio 10.5:1 Horsepower Rating 375 hp - 395 hp Torque Rating 410 ft./lbs.     Application Information   ...

  338. Mopar EZB Engine Specs

    Early Gen 3 Hemi 5.7L Truck / SUV / Car

    Performance Specifications Compression Ratio 9.6:1 Horsepower Rating 340 hp - 350 hp Torque Rating 390 ft./lbs.   Application Information VIN 8th Digit Year Ma...

  339. How do I install my Gen 3 Hemi Cylinder Heads?

    Installation Procedure, Torque Specs and Sequence

    To properly install your Hemi Cylinder Heads, follow the steps below. This will prevent oil and coolant leaks and a loss of compression from a blown head gasket. **If you use aftermarket bolts or studs, follow the instructions that came with your n...

  340. Mopar ESF Engine Specs

    Gen 3 Hemi 6.1L SRT8 Car and SUV Engines

    Performance Specifications Compression Ratio 10.2:1 Horsepower Rating 425 hp Torque Rating 420 ft./lbs.   Application Information   VIN 8th Digi...

  341. Intro to the Mopar EZA and EZB

    Early Gen 3 Hemi 5.7L, Car and Truck Engines

    EZA The EZA was the first Gen 3 Hemi. It was introduced in 2003 with the newly redesigned 3rd generation Dodge Ram Truck. The EZA was used exclusively in Dodge Ram trucks from 2003-2008 and the Dodge Durango from 2004-2005. EZB The EZB was the fi...

  342. Mopar ESA, ESB Engine Specs

    6.4L Mopar "Big Gas" Truck Engine Specs

    Performance Specifications Compression Ratio 10.0:1 Horsepower Rating 366-410 hp Torque Rating 429 ft./lbs.   Application Information   VIN 8th ...

  343. Mopar ESD Engine Specs

    6.2L Mopar "Hellcat" Engine Specs

    Performance SpecificationsCompression Ratio9.5:1Horsepower Rating707-717 hp*Torque Rating645-656 ft./lbs.*   Application Information  VIN 8th DigitYearMakeModel92015DodgeChallenger SRT Demon*2015 - CurrentDodgeChallenger SRT Hellcat20...

  344. Mopar ESJ Engine Specs

    6.2L Mopar "Hellcat H.O." Engine Specs

    Performance Specifications Compression Ratio 9.5:1 Horsepower Rating 808-840 hp Torque Rating 717-770 ft./lbs.   Application Information   VIN 8...

  345. Intro to the Mopar ESD and ESJ

    Gen 3 Hemi 6.2L Supercharged, High Output and Standard Output Hellcat Engine

    ESD The ESD was introduced with the 2015 Dodge Challenger SRT Hellcat and produced 707 horsepower. Later, it became the ultimate performance option for a few other Cars, SUVs, and Trucks. Most models feature a 2.4L roots style supercharger. In 201...

  346. Intro to Mopar ESA, ESB, ESG and ESH

    Gen 3 Hemi 6.4L Car, SUV and Truck Engines

    ESA and ESB These Hemis are found only in medium and heavy duty RAM trucks (2500-5500) starting in 2014. The ESA and ESB engines are identical. However, the ESB is detuned for fleet and heavy duty applications. ESG and ESH Introduced in 2011 as t...

  347. Intro to the Mopar ESF

    Gen 3 Hemi 6.1L SRT-8 Car and SUV

    ESF The 6.1L was the beginning of the performance-first Gen 3 Hemis. It made 425 hp using an aluminum intake, tubular exhaust headers, revised high flow heads, and a superior cam profile. The ESF was only found in 2005-2010 SRT-8 versions of the Ch...

  348. I know my VIN. Which Gen 3 Hemi do I have?

    Identify Mopar Gen 3 Hemi Engines by VIN

    You’ll find the third Gen Hemi in a number of Chrysler, Dodge, Jeep, and Ram vehicles. You can identify them with a combination of Vehicle Identification Number (VIN), year, and type of vehicle. Locate the 8th digit of the VIN and vehicle year. ...

  349. Intro to the Mopar EZC, EZD, EZE, EZF, and EZH

    2009 and Newer Gen 3 Hemi Eagle 5.7L Car, SUV and Truck Engines

    The late 5.7Ls are all very similar in terms of performance and parts interchangeability. The most common are the EZH and EZC. EZH The EZH was introduced in the middle of the 2009 model year. It features both Variable Valve Timing (VVT) and Mopar’...

  350. Can I use an older Mopar automatic transmission with a Gen 3 Hemi?

    Mating a Chrysler Automatic to a Gen 3 Hemi Engine

    Any automatic transmission with the small block “LA” bellhousing will bolt up to a Gen 3 Hemi. The only difference is that the bolt at the 12 o’clock position is not used in the Hemi block. There are some other considerations when doing this swap. T...

  351. Hemi Engine Tech - Multi Displacement System (MDS)

    Overview of the Mopar MDS system

    The purpose of the Multiple Displacement System (MDS) is to improve gas mileage. How is it Identified? The MDS system can be identified in two ways. The first is by removing the intake manifold and inspecting the valley. In the valley you will ...

  352. How do I delete the MDS on my Gen 3 Hemi engine?

    Disabling MDS Vs. MDS Delete

    This article applies to any Gen. 3 Hemi engine with the Multi Displacement System (MDS). You have three options that will keep the engine in 8-cylinder mode. Option 1 Adjust the transmission settings. MDS is automatically disabled when you switch ...

  353. How do I cam swap a Gen 3 Hemi?

    Removal and Installation Procedure for 2003 and Later Mopar Hemi Car, SUV, and Truck Engines

    Replacing the cam in a Gen 3 Hemi is a little more involved than some other engines. While it is possible to swap a cam with the engine in the vehicle, replacement of the timing chain and guides requires removal of the oil pan. This can be difficult...

  354. How do I get more power out of my Early 5.7L Gen 3 Hemi?

    Upgrading the Early 5.7L Hemi Engine

    There are many options for upgrading your Hemi. On a stock engine, the following upgrades can improve performance and fuel economy: Cold Air Intake Kit Headers Aftermarket Exhaust Computer Programmer Engine Block These engines have a 3.917 ...

  355. How do I get more power out of my 6.4L Gen 3 Hemi?

    Upgrading the 6.4L Hemi Engine

    There are many options for upgrading your Hemi. On a stock engine, the following upgrades can improve performance and fuel economy: Cold Air Intake Kit Headers Aftermarket Exhaust Computer Programmer Engine Block These engines have a 4.090 ...

  356. Ford 7.3L "Godzilla" Engine Specs

    Ford 7X Gas Engine Specifications

    Performance Specifications Compression Ratio 10.5:1 Horsepower Rating 430 - 505 hp Torque Rating 475 - 550 ft./lbs.   Application Information VIN 8th Digit Ye...

  357. Intro to the Ford 7X “Godzilla” V8

    The 2020 and Newer 7.3L Gas Engine

    Ford first introduced the Godzilla engine in 2020 as an option for Ford Super Duty trucks. In 2021 a detuned version found its way into the E-series Super Duty vans. This was Ford’s first pushrod V8 in decades. It makes impressive power in stock for...

  358. Ford Coyote First Gen Car Engine Specs

    2011 to 2014 Mustang GT 5.0L Engines

    Performance Specifications Compression Ratio 11.0:1 Horsepower Rating 412 hp - 420 hp Torque Rating 390 ft./lbs.     Application Information   ...

  359. Ford Coyote Second Gen Car Engine Specs

    2015 to 2017 Ford Mustang GT 5.0L Engines

    Performance Specifications Compression Ratio 11.0:1 Horsepower Rating 435 hp Torque Rating 400 ft./lbs.     Application Information   V...

  360. Ford Coyote Third Gen Car Engine Specs

    2018 to 2023 Ford Mustang GT 5.0L Engines

    Performance Specifications Compression Ratio 12.0:1 Horsepower Rating 460 hp Torque Rating 420 ft./lbs.     Application Information   V...

  361. Ford Coyote First Gen Truck Engine Specs

    2011 to 2014 Ford F150 5.0L Engines

    Performance Specifications Compression Ratio 11.0:1 Horsepower Rating 412 hp - 420 hp Torque Rating 390 ft./lbs.     Application Information   ...

  362. Ford Coyote Third Gen Truck Engine Specs

    2018 to 2023 F150 5.0L Engines

    Performance Specifications Compression Ratio 12.0:1 Horsepower Rating 395 hp Torque Rating 400 ft./lbs.     Application Information   V...

  363. Ford Coyote Second Gen Truck Engine Specs

    2015 to 2017 F150 5.0L Engines

    Performance Specifications Compression Ratio 10.5:1 Horsepower Rating 360 hp Torque Rating 380 ft./lbs.     Application Information   V...

  364. Intro to the Ford Coyote Engine

    2011 and newer F150 and Mustang 5.0L Engines

    In 2011 Ford released the newest version of their modular engine, the “Coyote” 5.0L. It can be found in the Mustang GT and F-150. While there are some differences between the car and truck version, they offer impressive power across 3 gene...

  365. Ford Road Runner Engine Specs

    2012 to 2013 Mustang Boss 302 Engines

    Performance Specifications Compression Ratio 11.0:1 Horsepower Rating 444 hp Torque Rating 380 ft./lbs.     Application Information   V...

  366. Ford Coyote Third Gen Bullitt and Mach 1 Engine Specs

    2019 to 2023 Limited Production Mustang 5.0L Engine Specs

    Performance Specifications Compression Ratio 12.0:1 Horsepower Rating 480 hp Torque Rating 420 ft./lbs.     Application Information   V...

  367. I know my VIN. Which 5.0L Coyote Engine do I have?

    Identify Ford 5.0L Coyote Engines by VIN

    You can only find the Coyote 5.0L in certain models of the Ford Mustang and F-150. You can identify them with a combination of Vehicle Identification Number (VIN), year, and type of vehicle. Locate the 8th digit of the VIN and vehicle year.Consult t...

  368. How do I get more power out of my Coyote 5.0L?

    Upgrading the Ford Coyote Engine

    p>There are many options for upgrading your 5.0L. On a stock engine, the following upgrades can improve performance and fuel economy: Cold Air Intake Kit Headers Aftermarket Exhaust Computer Programmer Engine Block These engines have a 3...

  369. Ford 4.6L 2V Engine Specs

    1991 to 2012 4.6L Ford 2-Valve Modular Motor Technical Specifications

    Performance SpecificationsCompression Ratio9.0:1Horsepower Rating190 hp - 260 hpTorque Rating260 ft./lbs. - 305 ft./lbs.     Application Information  VIN 8th DigitYearMakeModelW,91992-2012FordCrown VictoriaW,61997-2014FordE-150W...

  370. Ford 4.6L 3V Engine Specs

    2005 to 2010 4.6L Ford 3-Valve Modular Motor Technical Specifications

    Performance SpecificationsCompression Ratio9.4:1Horsepower Rating300 hpTorque Rating320 ft./lbs.     Application Information  VIN 8th DigitYearMakeModel82006-2010FordExplorer82009-2010FordF-150H2005-2009FordMustang GTH2008-2009Fo...

  371. Ford 5.4L 2V Engine Specs

    5.4L Ford 2-Valve Modular Motor Technical Specifications

    Performance SpecificationsCompression Ratio9.0:1 - 9.8:1Horsepower Rating235 hp - 260 hpTorque Rating330 ft./lbs. - 350 ft./lbs.   Application InformationVIN 8th DigitYearMakeModelL, Z1997-2017FordE-150L, M, Z1997-2017FordE-250L, M, Z...

  372. Ford 5.4L 3V Engine Specs

    5.4L Ford 3-Valve Modular Motor Technical Specifications

    Performance SpecificationsCompression Ratio9.8:1Horsepower Rating300 hp - 320 hpTorque Rating330 ft./lbs. - 360 ft./lbs.   Application InformationVIN 8th DigitYearMakeModel52005 - 2014FordExpeditionV, 52004 - 2010FordF-15052005 - 2010FordF...

  373. Ford 5.4L 4V Engine Specs

    5.4L Ford 4-Valve Modular Motor Technical Specifications

    Performance SpecificationsCompression Ratio8.5:1 - 10.0:1Horsepower Rating300 hp - 550 hpTorque Rating330 ft./lbs. - 510 ft./lbs.     Application Information  VIN 8th DigitYearMakeModelH2000FordMustang Cobra R*S2004 - 2006Fo...

  374. Intro to the Ford Modular 4.6 / 5.4L 2V Engine

    Ford Modular 2-Valve V8 Motor Overview

    Ford 4.6 2-Valve Engine. The 4.6L Ford engine was first used in the 1991 Lincoln Town Car. It was also made available for trucks and vans starting in 1997. The PI or “Performance Improved” version was introduced in 1999 and ran virtually unchanged i...

  375. Intro to the Ford Modular 4.6 / 5.4L 3V Engine

    Ford Modular 3-Valve V8 Motor Overview

    Ford 4.6 3-Valve Engine. The 4.6L 3V engine was first available in the 2005 Mustang GT. Variable cam timing and a charge motion control valve helped make this a potent performance engine. It was also available in some trucks and SUVs until 2010. For...

  376. Intro to the Ford Modular 4.6 / 5.4L 4V Engine

    Ford Modular 4-Valve V8 Motor Overview

    Ford 4.6 4-Valve Engine. The 4.6L 4V engine was first available in the 1993 Lincoln Mark VIII. With a few changes this was the engine that powered the SVT Cobra from 1996 until 2004. Ford 5.4L 4-Valve Engine. The 5.4L 4V was introduced in 1999 for t...