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Old 05-01-2021, 02:36 PM   #3
geezer#99
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Join Date: Aug 2009
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Re: In need of ring end gap specs for 250 inline 6

The number that comes to mind is .0045 times the bore size.
So yes an overbore could need a slightly bigger gap.
Also considering today’s swill they call gasoline and likely more heat in the motor it’s likely best to go a bit wider.
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