Bill Freeman wrote:

Paul, Smooth-edged holes in pistons
are most always detonation.

Bill

I think he said it was in the ring area. I have never heard of
a hole in the ring area. Plausible if the ring was broken for
a long time and blowby was erroding the aluminum. These kinds
of things just can't happen with a cast iron rotor and steel
combustion chamber liner like we have in the rotary.

Paul Lamar
 
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