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Thread: cam question, 455 olds

  1. #1
    dgie
    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

  2. #2
    Wet Dream
    Have you looked at www.realoldspower.com ?

  3. #3
    dgie
    yep, I posted it there also and getting very little responses on that board also. I may just go ahead and go with the larger cam.

  4. #4
    Wet Dream
    Yeah, I just noticed that over there. Sorry. I was looking at your #s and would do the same. I wish I could tell what cam I was running, but I don't have the specs.

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