Edelbrock 7800 Serie Instructions D'installation

• 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, Pacific Standard Time.
• 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
Character indicating a standard straight-
up or zero (o), advanced (4A or "A"), or
retarded (4R 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 Fig. 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 with each
other. Misalignment can cause chain to break (see Figure. 2).
• SPECIAL INSTRUCTIONS FOR #7820
For 1962–'64 vehicles, discard original spacer and thrust plate and use
©2016 Edelbrock LLC
Rev. 11/10/16 NP
Danchuk # 13150-13151
®
Instructions
O
A R
PERFORMER-LINK TIMING CHAIN & GEARS
Ford thrust plate #C90Z-
6269-A.
For 1965 to 1972-1/2
vehicles, use existing
thrust plate.
For 1972-1/2 to 1984
vehicles, discard original
2-piece eccentric and use
1-piece eccentric Ford
#M-6287-B302 (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
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 the
block thoroughly before
assembling.
Page 1 of 6
CATALOG # 7800 SERIES
INSTALLATION INSTRUCTIONS
YES
Figure 1 - Use a sleeve to
install press-fit sprockets
Camshaft
Block
YES
Crankshaft
Figure 2 - Check alignment of chain to
(see
ensure that both sprockets are correctly
installed
Catalog # 7800 Series Timing Chains
NO
Camshaft
Block
NO
Crankshaft
Brochure #63-0128