at the thought of 24 psi on pump gas, but I can absolutely positively guarantee everybody that there is not any hint of detonation at this boost either on the dyno with headphones hooked into the det sensor, or on the drag strip :) After lots and lots of runs compression is still 170 across the board. Plus whats the use of forged pistons if your not pushing them a bit. If they break then they get replaced and be more careful next time :)