fuel pressure question

jamie2370 · 10-04-2020, 05:40 PM

H/SA 350 sbc with quadrajet(Deano carb). Car has a Magnafuel Prostart 500 fuel pump(rated 26-38psi) 12an line to front, Product Engineering Regulator rated 4-12 psi. I am pretty sure that the carb is letting fuel by the needle and seat. It is very rich, sometimes floods out, but then other times at an idle it is perfect. I can not get pressure to go below 6 psi. What is too much pressure for that carb? I know the pump is overkill but it was on the car when I got it. I tried a barry grant regulator that I took off a holley black pump system that was set at 7 psi, it went over 12 psi when I turned the pump on?? SO... do I have a carb issue, too much fuel pressure, or Both lol

10-04-2020, 05:40 PM	#1
jamie2370 Member Join Date: Dec 2014 Location: Perry, GA Posts: 331 Likes: 11 Liked 239 Times in 90 Posts	fuel pressure question H/SA 350 sbc with quadrajet(Deano carb). Car has a Magnafuel Prostart 500 fuel pump(rated 26-38psi) 12an line to front, Product Engineering Regulator rated 4-12 psi. I am pretty sure that the carb is letting fuel by the needle and seat. It is very rich, sometimes floods out, but then other times at an idle it is perfect. I can not get pressure to go below 6 psi. What is too much pressure for that carb? I know the pump is overkill but it was on the car when I got it. I tried a barry grant regulator that I took off a holley black pump system that was set at 7 psi, it went over 12 psi when I turned the pump on?? SO... do I have a carb issue, too much fuel pressure, or Both lol

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