Forced Induction motors that have died

1slow370

I simplified it ****, more boost =more blow by meaning on a fi motor you want to run a wider second compresion ring gap, especially since the factory pistons have no accumulator groove between the rings. The motor comes stock with the second ring running a tighter gap than the first ring which leads to flutter on a boosted engine since there is more blow by

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SG4247

+1
We now do this to the rings on very high compression natural aspiration racing engines as well. Improved oil consumption, improved high RPM ring seal (flutter), and less ring failures with this gap strategy, even though it seems to go against conventional wisdom. We use very thin, light tension rings.