Re: electric fuel pump psi and gph for 1952 200 deluxe w/327ci

Posted by Fish'n Jim On 2022/4/6 8:35:26

Don't know where you measured 175F, but >140F is hot to the touch, where you'll pull away. Ethanol gas doesn't like that temp range and this car was not designed for it. Not sure if it's fuel starved or fuel rich that's causing the stall. Insufficient info.
Ethanol gas was found to co-distill with certain mid-fractions in the base gas so it's boiling curve is much flatter than the old gas. So that's what's flashing. I'll dig up my file and post, not sure where it is right now. I'm a bit puzzled that the electric pump isn't maintaining pressure in the line which will suppresses vaporization. The float maybe by-passing either too much pressure or the seat is gone. I like to add a fuel pressure gauge so I can see what's going on. They're only a few bucks and tee into the fuel line before the carb. If it's too much pressure, blowing by the float, then you need a fuel pressure regulator.
If you have non-ethanol gas locally, that's the easiest fix, since you're in the low compression engines.
Low compression will only affect the ability to pull into the engine, aka vacuum. Won't affect ignition. Higher the compression, harder to fire.