Ls1 Piston Ring gap
Thread Starter
Teching In
Joined: Dec 2022
Posts: 13
Likes: 0
Ls1 Piston Ring gap 1999 ls1 .023-0.24 on top rings, .017-.019 on the second ring, and oil rings .026-.031. Build is stock, may see boost but probably not. What should I be looking for as far as ring gap on each ring including oil rings?
Last edited by red79phoenix; Feb 23, 2023 at 03:42 PM. Reason: Add engine
Second ring must have larger gap than top ring or gases can’t escape. It will cause ring flutter and rings won’t seal. With .023-.024 top, you need to shoot for .026-.028 second ring. Oil rings are fine. Are you 100% sure that you don’t have top ring and second ring mixed up?
Thread Starter
Teching In
Joined: Dec 2022
Posts: 13
Likes: 0
Second ring must have larger gap than top ring or gases can’t escape. It will cause ring flutter and rings won’t seal. With .023-.024 top, you need to shoot for .026-.028 second ring. Oil rings are fine. Are you 100% sure that you don’t have top ring and second ring mixed up?
So I guess I need to file the second ring down to .026-.028?
Seems like these first ring gaps are screaming to be boosted….
The rings are ridiculous today. I went through checking two sets of Hastings iron rings and each had a top gap of around .028. While I did not measure the second ring, the gap appeared larger. I talked to the machine shop about the size of the rings and he said all Hastings rings had larger gaps than the OE .015, and not worry about it. So, I guess they're all gaped for boost and nitrous.
