Cam Degree help

Slant 6 Engines

  1. briwill70

    briwill70 Well-Known Member

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    I have a Oregon 2106 cam that I'm trying to degree. I have DD's book but does not explain this very well. Is there an easy way to verify that the timing set is accurate? I'm marking when IN/EX valves open and close but can't make sense of the numbers. Measured true TDC and marked on wheel. Also verified that timing mark/balancer aligns.

    IMG_8697.jpg
     
  2. RustyRatRod

    RustyRatRod Bla de blizhibliz de blatde blizi bla bla FABO Gold Member

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    It's very, very, VERY difficult to degree a camshaft in the way you have "ALL THAT" set up. It's much easier and MUCH more accurate if you use the tool that plugs into the lifter bore that holds the dial indicator. Then, you are on square with the lifter bore.
     
  3. krazykuda

    krazykuda Well-Known Member FABO Gold Member How-To Section Editor

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    I like to install the heads, rockers, and pushrods, then put the dial indicator on the top of the valve retainer to measure actual valve movement...
     
  4. my68barracuda

    my68barracuda Well-Known Member

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    there are two main ways to degree a camshaft
    1) valve lift at .050
    2) Intake Centerline method
    they are two separate and unique ways to get to the same setting.
    I typically use the Intake Centerline method as I am after a specific ICL.
    I will then go back and use the valve lift at .050 method to see how that compares to the valve lift at .050 that is on the cam card.
    Main thing is do not confuse or mix the two, also what folks said about getting the dial indicator and the wheel on the crank stable is very important.

    this link walks one through using the valve lift at .050
    Quick Tech: Degreeing A Comp Cams Camshaft In A Mopar 440

    this link walks on through the Intake Centerline method
    the cam degree info starts about page 9
    http://www.compcams.com/pub/media/productattach/1/4/145.pdf

    there are also video links on youtube

    take the time to review and get familiar with the processes, seems complicated till you get the feel for it, then everything will fall in to place.
     
    Last edited: Jul 21, 2020
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    • dart19666

      dart19666 FABO Gold Member FABO Gold Member

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      We also made a video here at Crower.

       
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      • my68barracuda

        my68barracuda Well-Known Member

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        it came to my mind that being familiar with cam shaft terminology and understanding how the camshaft factors play together is important to understanding the why and how to cam degreeing.
        the article at the link does a good job of explaining camshafts and then then covers information on the components around the cam.
        Engine Camshaft Basics - Popular Hot Rodding Magazine
         
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