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Gear Drives
Accu-Drive® Camshaft Gear Drives | Two-Piece Stamped Aluminum Front Cover | Aluminum Timing Covers
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Edelbrock Accu-Drive® Camshaft Gear Drives by Cloyes
Gear Drive #7890
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 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.
Important Note:Accu-Drive® Gear Drives are not recommended for use above 7,000 rpm or on computer-controlled vehicles with knock sensors.
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*
Ford 351-C V8 (not for 351M/400) .#7896*
Ford 429-460 V8 (1968-87) .#7894*
Pontiac 326-455 V8 .#7895*
Accu-Drive® Notes
#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 and 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.
Two-Piece Stamped Aluminum Front Cover
This die-stamped two-piece front cover for small-block Chevys is made from .090" aluminum for light weight and excellent strength.This attractive and unique design allows quick camshaft removal without dropping oil pan or breaking oil pan seal.Includes all necessary gaskets,bolts and seals.Will not fit 1987 and later engines.Note:If cam button is desired,a nylon cam button must be used.
Small-Block Chevrolet .#4242
Replacement Gasket Kit .#4243
Aluminum Timing Covers
Edelbrock’s die-cast polished timing covers comes with pan seal,allen head bolts,gaskets and washers.#4240 won’t fit 1987 & later; #4241 won’t fit 1991 and later big-block Mark V engines.
Small-Block Chevrolet (C) .#4240
Big-Block Chevrolet .#4241
These new die-cast aluminum timing covers are stock replacement parts for late model EFI 5.0L and 351W Ford engines.Everything required for installation is included:gaskets,crankshaft seal,and timing marker.Both are compatible with stock or Edelbrock Victor Series aluminum water pumps.
1965-78 289 (non K-code) & 302 .#4250
1969-87 351-W .#4250
1986-93 5.0L and 1988 & later 351-W with reverse rotation water pump .#4251
Accurate Timing Control...No Chain to Stretch
Smooth Cam Rotation for
Precise Valve Timing
Provides Multiple Cam Timing
Adjustments for Optimum Performance
Compatible with all
Standard Camshafts
(C) #4240 is compatible with short thrust buttons (.640").
*Not legal for sale or use on pollution controlled motor vehicles.