USMC_Turbo6
Well-Known Member
- Joined
- Dec 13, 2009
What do you guys think about zero gap piston rings?
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A little blowby in these always seems like it ends up being alot. Last motor had 4% leakdown and still had oil contamination issues and oil out of the breathers etc. Going gapless this time.
I've use Total Seal gapless tops with great success. Clean oil, and always next to no leakdown. And almost no oil getting pushed out of the motor.
I have tried both types of gapless rings more then once because I like giving things a chance, they sound like the best thing since sliced bread. More people have had bad results then good overall. Well after a few times around the block I will not use gapless again even if they were FREE!!!
"Good luck" but remember you were warned.
I would NOT recommend top ring gapless due to heat issues causing the thin ring to slack, BAD. I've seen a top gapless fail with-in minutes on a high power engine.
I also don't like a 2nd gapless, either. They are reported to cause top ring flutter. Read up on them on speedtalk.com Most top engine builder don't like them. (some do, though) On a turbo engine I REALLY don't like the idea of a ultra thin top ring combo. Too much heat on it. What rings do NHRA Pro-Stock guys run? Reportedly standard rings. Is there any hosepower in gapless? Not that I have ever heard. Are they worth the money? Not that I have ever heard, at least objectively. Most guys that swear by them, are the ones that got suckered into buying them.
There is also ALOT of stuff happening to all the rings at high boost. I personally have used Dykes rings, gapless,and standard, and I really cannot quantify a gain/loss in either. Blow-by WILL happen. Over 1000 psi under boost to try and keep sealed up.
Give them a try and do your best to quantify a result. Hard to do, but let us all know.
If there is a ton of blow-by, just turn the boost up a pound or two to make up for it. A turbo covers LOTS of mistakes. (thank God):biggrin: