Did any of the other pistons look all detonation ravaged like #1? Wonder if there was something going on with that injector or just the bad Duluth gas.
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Originally Posted by scheides
Just talked to Shawn (simulatedwood) and he's leaning towards TTP's theory where the rings are gapped to tightly from the factory. Running good (high) timing for extended periods causes EGTs to get high and the pistons/rings fully fully expand causing the cyl wear that can be seen on all cylinders.
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Higher timing lower EGTs. The scoring on the other cylinder is a little weird. Question is whether the damage was causes by parts from #1 getting into the others, the tight gap theory or something else. Were the spark plugs on the other 3 cylinders eaten up from det or look like something hit them?