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Narrower spark plug gap for higher compression?

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21K views 6 replies 6 participants last post by  Jeffytune  
#6 ·
With these new twin cams, the spark voltage is so hot as compared to years ago. You are perfectly fine at 38-40 thousandths gap. And if your engine is properly tuned (efi) a colder heat range is not needed.
 
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