Originally Posted by 69-chvl

Just for conversation...

It would be nice to see the piston. But would you all say that if the piston has broken rings lands, piston cracked, etc that its probably timing related as combustion tried to occur too early or deto? To me, lean AFR would appear to be more of a "burn" or errosion of the piston.

Or too lean maybe causing the deto? I still would like if it was run lean you would see some evidence on the piston. I've seem alot of failed pistons that look perfect other than a clean crack on it...gotta be timing IMO.