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R. Thorne · 01-17-2016, 11:15 AM

The article on Scott burton's car in high performance Pontiac is another good one.
I made a couple of chapman's ring tools years ago and still use them. all rings have a torsional twist as they are compressed into the bore. Chapman's lapping process "seated" the bottom of the ring and made it flat.
I used perfect circle's manulathe years ago to save worn piston grooves. A simple device that worked very well. Ron.

01-17-2016, 11:15 AM	#8
R. Thorne Member Join Date: May 2009 Posts: 181 Likes: 57 Liked 99 Times in 32 Posts	Re: Lapping piston rings The article on Scott burton's car in high performance Pontiac is another good one. I made a couple of chapman's ring tools years ago and still use them. all rings have a torsional twist as they are compressed into the bore. Chapman's lapping process "seated" the bottom of the ring and made it flat. I used perfect circle's manulathe years ago to save worn piston grooves. A simple device that worked very well. Ron.