leonard1 said:Thanks, that article was worth a read. I just can't see how this wild ping could occur since there are no loose deposits as the head is polished and the piston is brand new. Can you shed some light on whether the high compression is over the top and does running high compression require richer jetting.
whenfoxforks-ruled said:It may stop your piston fron melting. But it will not run good. Get a stock head that is not ruined by polishing. I can only hope you did not polish the ports also. Your squish still seems like a lot to me. How did you measure it? .7 mm is a lot, but it was a kdx. Never seen a kdx that needed 112 octane fuel.
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