After 800 miles and a dyno my cp piston 9.7 cracked
I have seen many cases like me
I would go to endyn piston
I tune map is not the problem afr 11.3
I think that the sharp edges of the piston triggered ignitions evil
blown head gasket also
the my setup
https://honda-tech.com/forums/forced-induction-16/civic-king-kong-italy-3050278/
problem

 

Cracked piston = too much ignition advance.

 

def detonation but thats the weakest part of the CP piston

 

you say you think detonation caused the failure... but the tune wasnt the issue? kinda contradicting to one another.

 

picnowork