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Old 03-10-2015, 07:27 PM   #1
Ron W
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Join Date: Jan 2011
Location: Central Me.
Posts: 260
Default Re: Tight Piston Clearance, Not Model A

We always used about .001/inch for cast pistons. Kieth Black's can run a little tighter, especially in aluminum blocks. Forged pistons got about .0015/in when I did them many years ago in race engines. What we did then was crude compared to what is done today. Ron W
PS Too loose will run, too tight won't!

Last edited by Ron W; 03-10-2015 at 07:33 PM. Reason: PS
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