i dont think quench is as important on a hemi. you atomaticly get some sort of quench because of the shape, the piston "grinds" the gases (if that makes any sence)wich i belive causes some turbulence. aldough i know that you can run more comp than the wedge on pump gas. I ran my 478 with 13.75 comp ratio on 93 okt but with 28* advance