Some fuel pumps bypass at a higher than optimal carburetor pressure directly at the pump to keep the pump cooler. The bypass regulator up front also bypasses fuel, but at a much lower volume than the fuel pump is bypassing. I ran my fuel system like that for years at the recommendation of a fuel systems engineer.
1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's
1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
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