COMP Cams 9138 V2 Timing Set - Manual

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COMP Cams®
3406 Democrat Rd.
Memphis, TN 38118
Phone: 901.795.2400
Part # COMP4-153
Revised 8/16/11
Toll Free: 1.800.999.0853
www.compcams.com
COMP Cams® V2 Timing Set
Part # 9100, 9110, 9132, and 9138
Thank you for choosing COMP Cams® products; we are proud to be your manufacturer of choice.
Please read this instruction sheet carefully before beginning installation, and also take a moment to
review the included limited warranty information. Contact us toll free at 1.800.999.0853 or at
www.compcams.com under Tech Support with any questions.
Installation:
COMP Cams® 9-keyway crank sprockets give the installer the ability to correct or re-position
camshaft timing during engine assembly. As a general rule, retarding the cam timing will increase
high RPM horsepower, and advancing the cam timing will increase low-end torque. Using our 9-
keyway crank sprocket, the camshaft can be advanced or retarded by positioning the crank sprocket in
the 2°, 4°, 6°, or 8° advance or retard keyway.
Remember: The camshaft angle is half of the crankshaft angle, therefore the camshaft will
correspondingly advance or retard 1°, 2°, 3°, or 4°.
The keyway and corresponding timing marks are stamped with an “A” or “R” and a number (“A”
stands for advance and “R” stands for retard). The timing is achieved by placing the desired keyway
over the crank key and aligning the corresponding timing mark with the timing mark on the cam
sprocket.
For GM and Chrysler applications, refer to Figure 1 below: To advance the camshaft 1°, place the
2A keyway over the crank key and align the 2A timing mark with the mark on the cam sprocket.
For Ford applications, refer to Figure 2 below: To advance the camshaft 1°, place the 2A keyway
over the crank key and align the “o” above the 2A with the timing mark on the cam sprocket.
Notes: After determining which setting to use, we advise marking (with white marker or similar) the
corresponding timing mark and keyway. This will make them easier to identify during installation.
We recommend the chain and sprockets be pre-assembled before final assembly of the motor
to check for any interference between the block and the timing set. When installing or
removing the lower crank gear, which is a “press fit”, proper puller/installation tools should be
used to prevent damage to either the sprocket or the crankshaft snout.
INSTRUCTIONS