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Edelbrock 7800 Series Installation Instructions Manual

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PERFORMER-LINK TIMING CHAIN & GEARS

CATALOG # 7800 SERIES

INSTALLATION INSTRUCTIONS

© 2000 Edelbrock Corp. Rev.8/00

• SPECIAL INSTRUCTIONS FOR #7820

For 1962–’64 vehicles discard original spacer and thrust plate and use

Ford thrust plate #C90Z-6269-A.

For 1965–’72-1/2 vehicles use existing thrust plate.

For 1972-1/2–’84 vehicles discard original 2-piece eccentric and use

1-piece eccentric Ford #C3AZ-6287-B (original 2-piece eccentric may

be used with #7811).Use existing thrust plate.

All years:Do not re-install original oil slinger.

• SPECIAL INSTRUCTIONS FOR #7800 S/B Chevy

On some late model

engine blocks it will

be necessary to

check clearance

behind cam gear

(with chain on gear)

and engine block at

12 o’clock position

(see photo on the

right).Make sure

that the chain clears

oil galley bosses on

block with chain and

sprocket in the rearward most position.Grind or machine block for

clearance, if necessary. Clean block thoroughly before assembling.

• TIMING CHAIN AND GEAR KEYWAYS:

The Edelbrock crankshaft sprocket is manufactured with three

keyways (except street legal sets #7802, #7809, and #7814).Each

keyway is marked with a geometrical symbol indicating a standard

straight-up or zero (● or “0”), advanced (▲ or “A”), or retarded

(■ or “R”) camshaft position (See Figures 3 through 8, showing each

installed position).In many cases, being able to retard or advance a

camshaft enables you to be more exact when installing a camshaft for

a specific application.Advancing or retarding a camshaft can shift the

power range to a lower or higher RPM. Advancing a camshaft will

move the torque to a lower RPM, while retarding a camshaft will move

the torque to a higher RPM.For persons not familiar with camshaft

function, we suggest the standard installation position.

NOTE:If the timing symbol on your stock crankshaft sprocket is in line

with the keyway, use Figures 3,4, or 5 when installing your Edelbrock

timing chain and gears. If the timing symbol on your stock crankshaft

sprocket is not in line with the keyway, use Figures 6,7, or 8 when

installing your Edelbrock timing chain and gears.

CAUTION:

Edelbrock Performer-Plus camshafts have been engineered and

ground to produce optimum performance when installed in the

straight-up zero position only. DO NOT install a Performer-Plus or

Performer-RPM camshaft in an advanced or a retarded position.When

using Performer-Link Timing Chain and Gears (7800 Series) with

Edelbrock cam and lifter kits, straight-up timing alignment is achieved.

If any other timing gear set is used, it is necessary to check camshaft

position for correct timing alignment.This requires indexing the

camshaft with a degree wheel to verify timing alignment.OEM or

non-Edelbrock timing timing gear sets are not recommended for use

with Edelbrock camshafts.

• Performer roller chain sets are engineered to operate up to 6500 rpm.

• Never hammer directly on chain or sprockets.You can crack the

hardened links and pins and cause early failures.

• USE A SLEEVE for

installations that require

hammering (see

Figure 1).A brass drift

punch may be used if

you carefully alternate

blows on either side of

the sprocket to avoid

cocking.

• Never stretch the chain

with a screwdriver.

• Check for clearance

between the timing

chain and block and

between the chain and

front cover before

reassembly.

• Be sure that both cam

and crank sprockets are

exactly in line.

Misalignment can cause

chain to break (see

Figure 2).

Figure 1 - Use a sleeve to

install press-fit sprockets

Figure 2 - Check alignment of chain to ensure

that both sprockets are correctly installed

YES

NO

Camshaft

Camshaft

BlockBlock

Crankshaft

Crankshaft

YES

NO

• PLEASE READ THE FOLLOWING INSTRUCTIONS CAREFULLY FROM BEGINNING TO END BEFORE INSTALLING YOUR TIMING CHAIN

Check the listing on the box back or the Edelbrock catalog to be sure that you have the correct part number for your application.True Rolling timing

chain and gear sets are products of quality material and workmanship.They offer the ultimate in durability, performance, and low friction operation.

NOTE:For timing chain and gear installation, we suggest that you check the manufacturer’s service manual or Motors, Chilton’s, or Mitchell for

correct installation procedure pertaining to your type, year, and model vehicle.The main cause of timing chain and camshaft installation problems is

failure to apply the proper torque to the camshaft sprocket bolts.The correct torque value is given in the service manual, and we highly recommend

the use of a thread-locking compound such as Loc-tite™ or equivalent. If you have any questions, please contact us at our Technical Hotline at

1-800-416-8628, 7:00am-5:00pm, Monday through Friday, PST.