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Thread: spark plugs

  1. #1

    Default spark plugs

    I recently installed a new crate motor, 400 block stroked to 455. Runs like a champ but was just wanting to check the plugs and fine tune timing, noticed the plugs are black. Does that mean running too much fuel and change the jets in carb? Timing for now is 12 degrees before TDC. 10.5 : 1 compression aluminum Kauffman heads. Let me know what you think...
    Last edited by Custom "S"; December 15th, 2012 at 21:48. Reason: add picture

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