Hi,
There are many variables to the fuel pressure/volume theory.
-locaion of pump has a big impact, if it's lower than the tank and close it's best.
- fuel line size and restriction, like 90* bends, necked down fittings at the regulator,carburator needle and seat restriction is a biggie.
- #1-voltage at the pump, is it fed with a #10 wire to a relay directly to the battery? if not a 16 gauge wire from a toggle switch will have a major voltage drop across it and that will kill the voltage to the pump. say there is a 30% drop in amperage available to the pump windings, your pump is not working at 100% to start with, 110GPH is FREE flow, not under load. Say 80 GPH under load and a poor wiring feed,now your down to 50 GPH output Now add the other fuel filter and elbow restrictions and you have enough fuel volume to start a lawn tractor,haha.
At best there is the old drag racer trial and error method which says to me anyway that he needs 2 pumps.
Please don't be offended by my ramblings.
Perry.
