Edelbrock Accu-Drive Gear Drive B/B Chevy

SKU: EDE7891

Timing Gear Drive Sets

EDE Gear Drive...

Edelbrock

Edelbrock Accu-Drive Gear Drive B/B Chevy

SKU: EDE7891

Timing Gear Drive Sets

EDE Gear Drive...

Limited Availability from MFR Limited stock available from the manufacturer's distribution centre. The dispatch timeframe shown is an estimate based on historical orders of this part. This item is not held in our own warehouse, and availability and release timing may vary depending on manufacturer stock movements and processing at the time of ordering.

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Description

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

Product Overview

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

Features and Benefits

Compatible With All Standard Camshafts

Product Details

Adjustable:	No
Chain Included:	No
Color:	Satin Steel
Description:	Accu-Drive Camshaft Gear Drive
Diameter:	4.954
Inside Diameter:	0.751
Keyway Notch:	Yes
Material:	Steel
Mounting Hole Diameter:	0.399
Mounting Hole Quantity:	3
Outside Diameter:	4.954
Part Number:	ede7891
RGL:	WARNING: This product can expose you to Chromium, which is known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit www.P65warnings.ca.gov.
Sprocket Type:	Gear
Thickness:	0.585
Thrust Bearing Included:	Yes
Tooth Quantity:	48
Tooth Width:	0.1534
WARNING CA Proposition 65 Message:	WARNING: This product can expose you to Chromium; which is known to the State of California to cause cancer or birth defects or other reproductive harm. For more information; visit www.P65warnings.ca.gov.
WARNING CA Proposition 65:	Yes

Application Summary

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

Part Type

Engine Timing Camshaft Gear

Data: v4.2 - Upd: 2026-10-13 23:13:05

Features

Compatible With All Standard Camshafts

Specifications

Product Attributes - Brand: Edelbrock
Product Attributes - Manufacturer's Part Number: 7891
Product Attributes - Part Type: Timing Gear Drive Sets
Product Attributes - Product Line: Edelbrock Accu-Drive Gear Drives
Product Attributes - UPC: 085347078912
Product Attributes - Noisy: Yes
Product Attributes - Camshaft Gear Attachment: 3-bolt
Product Attributes - Gear Drive Idler Style: Dual idler
Product Attributes - Maximum Advance/Retard at Camshaft: 4 degree
Product Attributes - Maximum Advance/Retard at Crankshaft: 2 degree
Product Attributes - Thrust Bearing Included: Yes
Product Attributes - Offset Bushings Included: No
Product Attributes - Gaskets Included: No
Product Attributes - Gear Material: Steel billet
Product Attributes - Quantity: Sold as a set.
Product Attributes - Notes: Not designed to work on engines with a knock sensor.

Reference Information

Brand Name/s	Edelbrock
StreetFX SKU	ede7891
SFX Item ID	4236345
Supplier Item Code	4236345
Manufacturer SKU	7891
Manufacturer UPC	85347078912
Alternative References	EDB7891, EDL-7891