Piston to head clearance

GTX JOHN · 09-17-2025, 03:14 PM

In a street engine, I see no reason to
go any closer than 040. I run 050 due to
the fact that I will get carbon build up over
the miles of a street engine that I do not get
on the race cars.

Alan Roehrich · 09-17-2025, 07:23 PM

Easily runs at 0.042. Might get away with 0.038, but not worth it. You can buy a Cometic to get it exactly right.

09-17-2025, 03:14 PM	#1
GTX JOHN VIP Member Join Date: Jun 2009 Location: Boulder City, Nevada 89005 Posts: 2,742 Likes: 2,835 Liked 2,517 Times in 701 Posts	Re: Piston to head clearance In a street engine, I see no reason to go any closer than 040. I run 050 due to the fact that I will get carbon build up over the miles of a street engine that I do not get on the race cars. __________________ John Irving 741 Stock 741 Super Stock

09-17-2025, 07:23 PM	#2
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,139 Likes: 1,620 Liked 1,932 Times in 435 Posts	Re: Piston to head clearance Easily runs at 0.042. Might get away with 0.038, but not worth it. You can buy a Cometic to get it exactly right. __________________ Alan Roehrich 212A G/S

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