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How To Degree A Camshaft

Get Every Performance Detail Perfect When We Show You How To Degree A Camshaft

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With our big-block Chevy at 0.050 inch on the opening side of the lobe from max lift we recorded 62 degrees after top dead center (ATDC) and then 151 degrees ATDC at 0.050 inch from max lift on the closing side. Adding these two numbers together and dividing by two will give you the intake centerline. In our case: 62 + 151 = 213 / 2 = 106.5 degrees ATDC. The Comp Cams timing card supplied with our cam calls for an intake centerline of 106 ATDC, so we're within 11/42 degree of dead on. This told us that despite the numbers being off slightly at 0.015, the cam is installed correctly.

You back the engine up to 0.100 inch on the dial indicator before taking the reading at 0.050 on the opening side of the lobe because traveling past the data point and then turning the engine clockwise to approach the 0.050-inch data point removes any slack that may be present in the timing chain that resulted from turning the engine backward. This is why you don't turn the engine counterclockwise to 0.050, but rather go past it and then turn clockwise up to the first checking point. It's a small point, but accuracy is our goal.

TOOL LIST
DESCRIPTION PN SOURCE PRICE
Cam handle POW101035 Powerhouse
$26.95
Dial indicator, 0-1-inch POW151100 Powerhouse
29.95
Dial indicator ext., 1-inch POW151111 Powerhouse
5.00
Magnetic base POW151125 Powerhouse
29.00
Degree wheel, 9-inch POW101500 Powerhouse
16.00
Degree wheel, 16-inch POW101600 Powerhouse
179.95
Cam-checker tool, GM/Ford POW101400 Powerhouse
65.00
Crank nut, SBC POW101050 Powerhouse
15.00
Crank nut, BBV POW101055 Powerhouse
15.00
Pro crank socket, SBC POW103050 Powerhouse
26.25
Pro crank socket, BBC POW103055 Powerhouse
26.25
Piston stop, heads off POW101335 Powerhouse
9.95
Piston stop, heads on POW101330 Powerhouse
9.95
Deck bridge POW101310 Powerhouse
19.00
Deck bridge, magnetic POW101315 Powerhouse
51.95
SOURCES
COMP Cams Powerhouse Products
3402 Democrat Rd.
Memphis
TN  38118
800-872-7223
901-795-7600
www.powerhouseproducts.com
Powerbuilt Tools/Alltrade
Long Beach
CA
alltradetools.com
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