Edelbrock Accu-Drive Gear Drive B/B Chevy

Edelbrock part #7891 Accu-Drive camshaft gear drive kit for big-block Chevy engines 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. This Accu-Drive camshaft gear drive kit for big-block Chevy engines 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

Fitment

Chevrolet:Big-Block Mark IV:396 (6.5L)-454 (7.4L)

• 1986 Chevrolet C20 Custom
• 1986 Chevrolet C20 Scottsdale
• 1986 Chevrolet C20 Silverado
• 1986 Chevrolet C20 Suburban Custom
• 1986 Chevrolet C20 Suburban Scottsdale
• 1986 Chevrolet C20 Suburban Silverado
• 1986 Chevrolet C30 Custom
• 1986 Chevrolet C30 Scottsdale
• 1986 Chevrolet C30 Silverado
• 1986 Chevrolet K30 Custom
• 1986 Chevrolet K30 Scottsdale
• 1986 Chevrolet K30 Silverado
• 1987 Chevrolet R20 Suburban Custom Deluxe
• 1987 Chevrolet V20 Suburban Custom Deluxe
• 1987 GMC R2500 Suburban High Sierra
• 1987–1988 Chevrolet R20 Custom Deluxe
• 1987–1988 Chevrolet R20 Scottsdale
• 1987–1988 Chevrolet R20 Silverado
• 1987–1988 Chevrolet R20 Suburban Scottsdale
• 1987–1988 Chevrolet R20 Suburban Silverado
• 1987–1988 Chevrolet R30 Custom Deluxe
• 1987–1988 Chevrolet R30 Scottsdale
• 1987–1988 Chevrolet R30 Silverado
• 1987–1988 Chevrolet V20 Suburban Scottsdale
• 1987–1988 Chevrolet V20 Suburban Silverado
• 1987–1988 Chevrolet V30 Custom Deluxe
• 1987–1988 Chevrolet V30 Scottsdale
• 1987–1988 Chevrolet V30 Silverado
• 1987–1989 GMC R2500 Base
• 1987–1989 GMC R2500 High Sierra

…and 55 more applications.

Specifications

Manufacturer part number

7891

UPC

85347078912

Shipping weight & size

4.45 lb, 11 × 6.7 × 1.6 in

Documents

• Installation Instructions
• Warranty
• Installation Instructions

Notices

• Not legal for sale or use in California on pollution-controlled vehicles.
• WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
• Special order item — ships direct from the manufacturer; extended lead times may apply.