dgie
09-14-2003, 10:31 PM
I just got my engine back from the machine shop last week and today I degreed the (2) cams that I have. One is brand new and has a gross lift of .518 and the other is the original cam that the engine rebuilder first put in the motor. That one has a gross lift of .3936 I am wondering which one I should use with this motor, both are in real good condition, no pits, scoring, etc. The pump is a Jacuzzi 12wj pump; the boat is 18ft long and relatively light. The engine is a stock 455 olds .030, Torker intake and a 750 cfm Holley carb, and OT basset headers. Any suggestions on which cam would be best with this setup.
I do not have a cam card for the second cam all the numbers below are from me sticking a degree wheel on it. The cam has a gross lift of .3936. (.246 x 1.6 = .3936)
The other numbers for this cam are as follows:
Intake
155 degrees + 66 degrees = 221 degrees / 2 = 110.5
Exhaust
157 degrees + 57 degrees = 214 degrees / 2 = 107
Intake 110.5
Exhaust 107.0
Total 217.5 / 2 = 109
I do not have a cam card for the second cam all the numbers below are from me sticking a degree wheel on it. The cam has a gross lift of .3936. (.246 x 1.6 = .3936)
The other numbers for this cam are as follows:
Intake
155 degrees + 66 degrees = 221 degrees / 2 = 110.5
Exhaust
157 degrees + 57 degrees = 214 degrees / 2 = 107
Intake 110.5
Exhaust 107.0
Total 217.5 / 2 = 109