Everything I have seen/experienced is quench is really only important for detonation control on a street driven engine with octane limitations (pump gas). The main thing is you are better off to be quite a way out of the danger zone than flirting with it. In other words if you are not .030-.050 than set it up with .080 or more and avoid the range in between as it is more prone to detonation by being in the "close but not there" area.
All this applies to a hot pump gas engine, if you ask around at the track you will see most guys are only concerned about the end result of valve clearance/static ratio ect. and not the other way around,they let the quench fall where it is. Of course there are alot of variables and different approaches but I can say from all the engines I have seen on the dyno (a shop YR worked at did back to back tests a couple times on quench) there is no discernable power difference in any of them.
