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Edelbrock 7890 Accu-Drive Gear Drive, Small Block Chevy, Kit
Edelbrock 7890 Accu-Drive Gear Drive, Small Block Chevy, Kit

Edelbrock 7890 Accu-Drive Gear Drive, Small Block Chevy, Kit

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Edelbrock 7890 Accu-Drive Gear Drive, Small Block Chevy, Kit
Edelbrock 7890 Accu-Drive Gear Drive, Small Block Chevy, Kit
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We estimate this item will ship on or before March 29th.
Part # 3257890
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Important Messages:

  • This item ships directly from the manufacturer. It may take an additional 4 business days for Edelbrock to ship this item.
  • Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.
  • This item ships via Ground Shipping only. Expedited and Air shipping options are not available.


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MFG. Part #:
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Not designed to work on engines with a knock sensor.
Gear Attachment:
Gaskets Included:
Gear Drive Idler Style:
Dual Idler
Retard at Camshaft:
4 degree
Retard at Crankshaft:
2 degree
Thrust Bearing Included:
Offset Bushings Included:
Gear Material:


The Accu-Drive camshaft gear drive kit replaces a stock timing chain with a precision gear drive system. 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.
  • Precision Gear Drive System
  • Accurate Timing Control
  • No Chain To Stretch
  • Smooth Cam Rotation For Precise Valve Timing
  • Accurate and Multiple Cam Timing Settings
  • Compatible With All Standard Camshafts

Installation Instructions (PDF)

Some parts are not legal for use in California or other states with similar laws/regulations

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Q & A

Videos & Articles
  • What happens when you advance or retard a camshaft? In this tech article, we explain the pros and cons of installing your cam straight up, advancing or retarding.
  • Learn the basics to engine performance like; how does a cam work? What is Valve lift, duration, lobe separation angle, and cam profiles? Afterwords selecting the right camshaft will be less of a guessing game!
  • Speedway Motors Product Manager Jeff K. talks about how to really make your engine bay stand out from the crowd with just a little patience, and some Speedway products.
  • Tired of pulling your breather to pour oil in your system? We've got you covered.

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