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  1. #1
    Join Date
    Aug 2008

    Question on timing my 454 Mag

    I have a 454 mag engine with a Thunder bolt 4 ignition. What should my full advanced timing be at and what RPM? Also should my base timing be at 8 or 10?

  2. #2
    Pirate of the Chesapeake Gold Member Fenderjack's Avatar
    Join Date
    Aug 2006
    North Point Creek, Md.
    I found that 8 work great cause total should be no more than 30. JOHN

  3. #3
    Charter Member # 55 Charter Member Griff's Avatar
    My Boats:
    ..........32........... Active Thunder
    Join Date
    Oct 2000
    Stock base timing is 8*. Your module should be a V8-24. Total timing can be checked at around 3700rpms and it should be 32*.
    You can easily bump it to 10* base and 34*total, for a little better idle and throttle response.

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