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Thread: can the expected CMP offset be changed?

  1. 07-01-2021 #1
    brusk001
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    can the expected CMP offset be changed?

    I'm running a 411 PCM on my newly rebuilt 99 L29 7.4/454. Engine fires but for some reason the closest I can dial in the cam retard/offset is -10. i've tried two distributors and the scanner doesn't quite get there. Is there a table that can be updated to start with -10 instead of 0?
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  2. 07-01-2021 #2
    brusk001
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    Quote Originally Posted by brusk001 View Post
    I'm running a 411 PCM on my newly rebuilt 99 L29 7.4/454. Engine fires but for some reason the closest I can dial in the cam retard/offset is -10. i've tried two distributors and the scanner doesn't quite get there. Is there a table that can be updated to start with -10 instead of 0?
    Problem fixed, guy on an EFI group recommended taking the pin out of the gear and flipping it 180 and repinning. I can get to 0 now.
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  3. 07-01-2021 #3
    blindsquirrel
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    Yup, that works because the gear has an odd number of teeth (13).
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  4. 08-19-2021 #4
    Ratssled
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    What channel did you use to view the cam offset?
    And what calibration file are you using?
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