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Thread: how much plug gap?

  1. #1
    Member JUNIOR BUILDER
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    98

    how much plug gap?

    i have a 13 to 1 compression open chamber 468 bbc,with msd 7al3 ignition on race gas in drag car ,i was wondering what the best plug gap and timing might be?dont know if it matters but heads are aluminum.

  2. #2
    Senior Member RACING JUNKIE jmarksdragster's Avatar
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    .030 will work fine.
    Mark Whitener
    http://racingfuelsystems.myfunforum.org
    __________

    Good work isn't cheap, and cheap work can't be good.

  3. #3
    Senior Member RACING JUNKIE
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    X2 .030
    ***IN GOD WE TRUST***

  4. #4
    Senior Member EXPERT BUILDER
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    start at 31 degrees total timing then make a pass.step up to 33 degrees make a pass.if it went faster add more../...its really what ever makes your car run the fastest with the least amount of timing in her is goal

  5. #5
    Senior Member RACING JUNKIE
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    Whoops, didnt see the timing question.

    I run 40 TT in my 13-1 cast iron headed 496 bbc, every combo different.

    I agree with russ, start out low (around 33/35) and gradually work your way up.

    Goodluck, Cp
    ***IN GOD WE TRUST***

  6. #6
    Senior Member RACING JUNKIE
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    as said .030 on the gap
    Mine runs best around 38 deg but never been on a dyno.

  7. #7
    Member JUNIOR BUILDER
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    Jan 2006
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    98

    timing

    i was running 35 total car was running 6.40 went to 38 total car went 6.33 i think i am going to try 40?

  8. Racing Junk


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