Here’s the setup. 4.6 3V, forged and balanced with stock heads and 9.5-1 compression. TVS 2300R supercharger kit with custom tune. This makes 10psi, is supposed to be about 560hp and has been working ok with a 2009 GT500 fuel pump kit I installed with the blower. Stepping up to a twin 65mm throttle and going from a 3.5” to a 2.75” pulley gives about 15psi. Engine starts, runs and drives well. Try full throttle and it acts like it runs out of fuel around 4,000rpm. Just kinda goes flat. Looking at data log “new to me” I see ; Fuel Pump date cycle at .5 Fuel rail pressure drops from 38 to about 7psi. This is at WOT so the MAF counts clime until I close the throttle. Bad fuel pump or just too small?