fuel regulator

[john portala]

had my stromberg carb rebuilt for my 41 dodge  did a good job at a place called carburetors and more in Texas . It runs well. He sent some literature saying should put a holley fuel regulator 12-804 because too much fuel pressure for needle and seat carbs can cause flooding or drive ability problems. anybody ever install one?

 

John

[desoto1939]

most of the FP and assuming that you have an AC588 FP put out approx 4-7 LBS of pressure. So not sure if you will need a fuel regulator. If you have an electric FP onthe back near the gas tank sometime they can put out more pressre so then you might need a regulator.  The electric FP that is near my gas tank puts out arounf 4-6 LBS.  I have a 39 Desoto.

 

Rich HArtung

desoto1939@aol.com

[Loren]

Just a personal opinion here.

Your 41 Dodge doesn't turn 7,000 rpm or anything close to it and if it did the mechanical fuel pump probably couldn't deal with that many strokes per minute anyway.

All the racers I know concluded decades ago that fuel pressure regulators were a scam to sell a product that no one could prove had any benefit.

Those same racers determined that adding a F.P.R. just added another failure point (and fail they do).

If you have any of those "drivability problems" mentioned the correct solution is to re-adjust the float level. If that doesn't solve the problem I would take a real good look at the float, pivot pin and very possibly the carburetor top casting (they warp).

I can't think of one auto manufacturer that felt they needed a pressure regulator unless it was part of the carburetor (and I can't think of one carburetor that has one).

So...I say save your money.

[DJK]

I have the Carter electric FP on my 52 Cranbrook, after 3500 miles this summer, no issues w/o a regulator.

[Sam Buchanan]

No regulator here, either on my Carter pump.

 

[john portala]

thanks to all great opinions I have to agree with all your comments. I will recheck the float wen spring comes.

 

John

[greg g]

Holley designed their carbs to run best at 3.5psi or so.  They designed their fuel pumps to put out 5.5 to 7 psi.  Then they designed their regulators to drop the line pressure to 3 psi or so.  So they created a need for fuel pressure regulators to increase their profits. Simple business model, shoddy engineering. Chryser engineered their fuel pumps and carbs to work together, a simpler arrangement with fewer failure points.

Edited December 24, 2020 by greg g