Quote:
Originally Posted by wnta1ss
With .015 ring gaps, yes you were somewhat fortunate in that aspect. You say that your car made 724hp, but what was the dyno correction factor applied (like 1.15 or 1.20 or ???)? With you being in Colorado, my guess is that your actual horsepower was much lower than 724, and the observed/uncorrected figure is what we need to know to properly evaluate your experience with that car. High altitude means thinner air which means less horsepower.
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All that high altitude stuff goes out the door with supercharging....
You might have to run a smaller pulley to make the same HP at altitude though...
Besides, it isn't the rings. The failure in the pics doesn't support that theory.
If it were the rings butting, there would be seize marks all over the cylinder walls since the rings ends came together and bound up on the walls causing the lands to crack.
It's a detonation failure. Oil in the cylinder, going lean at WOT, bad tune, low octane, etc, is what everyone should be more worried about.