Based on multiple threads here the Carter P4070 electric fuel pump is being used successfully by lots of folks with dual Weber 40s. Question about the pressure. Looks like ideal pressure is 3-3.5psi for the Weber 40 dual carb set up. If I am understanding things correctly, the Carter 4070 produces 4-8 psi; above the recommended pressure. Am I mistaken?
Found this Carter marine unit, specified as 4psi, rather than the 4-8psi. Would this be a better choice? Any downsides to a marine unit vs auto specific?
https://www.summitracing.com/parts/crt-p4389
I plan on using a pressure regulator which decreases the pressure, meaning the flow velocity increases, ie higher volume per unit time. Not completely understanding carb needle/jet functioning, is the PSI (pressure) or GPH (flow velocity/volume) the problem when too high?
Last question, is the recommended psi based on what is delivered at a certain RPM, or from idle to full throttle?
I see a carburetor for idiots book in my future.
Thanks,
Dennis