As most of you guys already know im on my second turbo setup, and my second set of pistons (still stock).
Now the thing is im not really sure why i cracked pistons #2 + #4.
These were the conditions :

92 Octane pump gas
12psi boost w/ 12:1 fmu + hypertech 500hp fuel pump
stock injectors
bosch platinum quad electrode sparkplugs

One thing i recently learned is that an A/F guage that is hooked up to a stock o2 is no longer accurate after ~600F ...so even though when i was boosting 12psi and my guage red "rich" it might have been otherwise.


My initial response was : too much boost ! but then i learned that most of you guys are running 10-12psi.. next i thought the hot sparkplugs that i was running could have contributed, but i dunno how relevant that is.


Just wondering what other senerios exist, and what possible explainations exist for why i ended up w/ two cracked pistons.



-= RS Turbo=-