Edelbrock Accu-Drive® Camshaft Gear Drives

The Accu-Drive camshaft gear drive kit replaces a stock timing chain with a precision gear drive system utilizing a compound gear drive train. The gear drive can be easily installed. Just replace the stock crank and camshaft sprockets with Accu-Drive gears and slip in the idler assembly. Most Accu-Drives require no modifications to the engine block, although some fitting of the axles and front cover may be required.
The Accu-Drive gear drive system transmits power from the crankshaft gear to a full floating main idler which drives the camshaft gear. A unique feature of the Edelbrock Accu-Drive system is the ability of the main idler gear to float to an optimum position between the crankshaft and camshaft gears, assuring absolutely equal load sharing between the crankshaft and the camshaft gears. The gears are made from billet SAE-1144 steel with induction hardened teeth. Gear teeth are shaved for precision operation. The set features hardened and ground idler pins from billet steel and are compatible with all standard camshafts.

    Features Include:
  • Accurate timing control...No chain to stretch
  • Provides multiple cam timing adjustments for optimum performance
  • Smooth cam rotation for precise valve timing
Accu-Drive® Camshaft Gear Drives by Edelbrock
Application Emissions Part #
Chevy 262-400 V8 (1957-95) 7890
Chevy 396-454 V8 (1965-90) 7891
Ford 289-302 V8 (1962-85), 351-Windsor (1969-96) 7892
Ford 5.0L (1985-95 hydraulic roller lifter cams) 7892
Pontiac 326-455 V8 7895
Edelbrock Installation Note INSTALLATION NOTE: Accu-Drive Gear Drives are not recommended for use above 7,000 rpm or on computer-controlled vehicles with knock sensors. #7890 - On some late-model engine blocks, it will be necessary to check clearance behind cam gear at the engine block at the 12 o'clock position. Make sure gear clears oil galley bosses on block when in the most rearward position. Grind or machine block for clearance. Clean block before assembling. Not applicable to stock Chevy hydraulic roller-lifter cam-equipped engines. #7892 - On 1962-64 vehicles, discard original spacer & thrust plate. Use Ford thrust plate #C9OZ-6269-A. On 1965-72-1/2 vehicles, discard original 2-piece eccentric. Use 1-piece eccentric Ford #C3AZ-6287-B.

The following guide is designed to help you determine which Edelbrock components are legal for use on your vehicle. Learn more about Edelbrock Product Emissions Guide.

    50-State Legal
    For Racing Use ONLY
    For Use on Pre-Pollution Controlled Vehicles (PPCV)
    Stock Replacement Part
    Engine Swaps