Thread: New spark plug numbers
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Old 08-28-2012, 05:13 PM   #8
Purdy Swoft
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Join Date: May 2010
Location: Alabama
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Default Re: New spark plug numbers
I run the W-18 plugs gapped at .035 with a 5.9 head ,Winfield 3/4 race cam and dual updraft B carbs. The heat range is 7 and they run clean.
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