spark plug gap
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spark plug gap

  1. #1
    Senior Member steele211's Avatar
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    Default spark plug gap

    Looking for where I should be gapping my plugs on an alky motor with a mag and an 8-71. 470 ci, 9.5:1, 15# of boost

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  3. #2
    Canoe Jockey Michael Thomas's Avatar
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    I run mine .019-.020
    "If you can't dazzle them with brilliance...Baffle them with bullshit"

  4. #3
    Senior Member mdsheppie's Avatar
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    Quote Originally Posted by Michael Thomas View Post
    I run mine .019-.020
    what he said...

    Horsepower determines how fast you hit the wall. Torque determines the size of the hole you make.









  5. #4
    Senior Member jockorace's Avatar
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    I've always gapped (w/mag) at .018 and cut the tips back to the centerline. You can now buy plugs (Autolite AR) pre-cut. Jocko

  6. #5
    Senior Member rocket98's Avatar
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    We run them at 20-22
    They older we get the faster we were

  7. #6
    Ain't Right Racin piston in the wind's Avatar
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    .018-.019 depending on the mag. What is it and how hot ??

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