Need help degreeing a cam

moper said

If it's a 2° cam key, it will move the cam 2° in the direction of the offset. When measured on the crank with the degree wheel, it will indicate a 4° change because the cam moves 360° to the crank's 720° (cam turns at 1/2 speed of crank). so move the crank 4°, cam will move 2°. If your timing set has three possible positions take a look at it. If you have a 4° retarded crank keyway you can just use that with the straight up cam key you'll be at 109.5.

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Dave I agree that moving the crank 4* moves the cam 2* but since all measurements are taken off the crank I believe moving it 4* would put him at 111.5*, wouldn't it? I've degree'd in several cams and every timing set I've had that was stamped 4* moved the reading 4*.

DartFred, moving it that much (to 107.5*) IMO is a little too much. I don't like to move them over 4* max but that's my personal preference. It doesn't take long to change it to the 4* setting on the crank key so you might try it to verify what happens and let us know.