Quote:
Originally Posted by cbtoyz
Having the extra cylinder pressure should increase hp but how do they expand when they get hot? How loose would you run the piston to cylinder tolerances with those? I wasn't comfortable not knowing the answers to those questions and how they would handle the heat. Maybe I'll try them on my next build, but for now, I just opted for the old fashioned Mahle/Cummins rings.
Out of curiosity, what are your thoughts on them?
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There is room for expansion. At the end of the ring, the thickness goes to half of the total thickness and then overlaps the other end that way. That’s what I found when doing a bit of research on the subject at least.
I don't think piston to cylinder wall clearance would need to be changed to run them either.
I’ve looked into running them in a few different turbo gasoline engine applications, cost caused me to steer clear of them. I don’t think there would be any problems running them as long as the area for expansion was there, just like you would need some area for expansion on a standard style ring.