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Old 08-03-2021, 09:07 PM   #1
philcobill
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Join Date: Jul 2021
Location: Walworth, New York
Posts: 138
Question Spark plug gap for high(er) compression head

The engine on our '29 Special Coupe has high compression aluminum head. I remember reading that the spark plug gap for higher compression heads should be narrower (0.030 in) vice 0.035 in for stock heads. (I wish I could find where I read that.)



Is this something that I should be concerned about? What difference would a narrower spark plug gap make?

Bill
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