I'm in the process of tearing down an SR for rebuild, and I want to do as much of the job as I can myself. My question relates to measuring and gapping new piston rings.

As I understand it, the rings should be installed without pistons into the cylinder, about an inch down, and the gap measured. They should then be filed a little at a time until the gap is where I want it.

What tool is best suited to file the gap? I see Summit sells a few different styles but which type is easiest to use and achieve the best results? I don't plan on rebuilding a ton of motors so I don't see the need to spend a ton on a one time use tool if I can help it.

Also, what is a good gap size for a motor seeing ~18psi daily? I know too tight and there are problems, too loose and it'll smoke.

 

What size turbo are you using? Factory specs should be pretty good depending on HP goals.

 

GT2871r .86

 

I'd say your safe running factory specs. PM Epstein he knows alot more about it than I do.

 

CP Pistons users - what ring gap do you use ? - FreshAlloy.com Forums