Originally Posted by 240M3SRT
Bulldogger, i know you swear by the sl55 pump and say its the increase in volume that makes the difference, not the pressure.
Am i understanding you correctly that your saying the factory fpr is not a factor when running lean,and that 60psi fuel pressure is sufficient at all load and boost levels?
If this is the case, do you agree that 2 Walbro 255's routed in parallel would be as effective or more effective than the sl55 pump? It might even run too rich, but if what your saying is correct then this would settle it and prove more VOLUME is the answer.
Two pumps together will more then likely work. If pressure was the answer then the difference say between the 178 and 185 is about 5lbs then increasing the pump by 10 would be the answer. But Waldig increased the pressure and..... Yes but he did it with air pressure into the filter which increased the fuel flow by forcing the fuel out of the filter faster, which actually increased the volume supply.