After seeing my fuel pressure drop to 1.5 psi during acceleration, I added another lift pump to work with the previously installed unit (things are cheap enough at $160 each, which includes the filter too). Now I am seeing the pressure drop to no more than 3.5 to 4 psi during hard acceleration in stage 5 Edge. My neighbor and I both felt better tip in response too, especially right off idle. Starts immediately as well. Max pressure seems to be in the 6.5 to 7 psi range during cruise and idle, so I will probably get a large flowing fuel regulator from someone like Barry Grant, and limit it to 4 psi.