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Too much fuel pressure

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Bob Claffie

Bob Claffie

Jedi Knight
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I have an after market pump on my 100/6 and it overpowers my floats and sends gas out the overflow pipe. Looking for suggestions for sources of an inexpensive pressure regulator .
Thanks, Bob
.
 
For a good, budget regulator look for the Holley unit. I think some online retailers sell it for around $35. The Purloator (disk shaped one) costs less but you get what you pay for.
 
You don't want an inexpensive regulator; the ones you see in VB & Moss catalogs are junk. In fact they're so cheap, you throw them away before you use them.

Get a Holley regulator, they can be set and maintain the desired setpoint (output pressure).

Holley regulator:

IMG_6654.jpg
 
I had the same problem and tried the disk shaped cheap one, it would flow no fuel even under the lowest setting, this was with the facet type aftermarket pump.

So I agree the cheap ones aren't worth it.

I decided to rebuild my SU with some cyberhelp from Dave Dubois, who hangs out here on the BCF and has written some articles on the subject. I am pleased with results and the rebuilt pump has been ticking away merrily for a couple of months now.

I decided to put the old pump back in after a) experienching pressure issues despite the aftermarket pump being low pressure, and also reading several online comments from people that had experienced failures with their aftermarket pumps after 1-2 years or less. Since my SU had lasted 8 years before quitting (and who knows how long before that) and it presented no carb pressure issues, and if it failed there was a very good chance that I could fix it with roadside repairs I decided the cheaper aftermarket pump was really a false economy.
 
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I think all these cheap aftermarket pumps and regulators is a case of being; Penny wise and Pound foolish. Rebuilding the SU fuel pump is a viable option for most DIY's. Plus if it is an original pump it's castings are stronger than the new devices and it contains genuine brass armatuer bearings instead of plastic ones.
Further if an aftermarket pump has been installed the fuel lines generally have been cut which requires that a ground now be added from the float housing to car structure assuring proper operation of the fuel gauge and adding a measure of overall safety.--Fwiw-Keoke
 
Holley pump ordered today, due in tomorrow and hope to install over the weekend. Original pump junk , hence the Facet type. Thanks all for the advise and cautions. Bob
 
Just out of curiosity - what is the proper fuel pressure? I have an aftermarket (Facet) pump and no regulator... could I be overflowing?
thanks
 
paulpo69 said:
Just out of curiosity - what is the proper fuel pressure? I have an aftermarket (Facet) pump and no regulator... could I be overflowing?
thanks
Click to expand...

If you have not had problems I doubt you are over flooding.The pressure for the SU carb is about 2.6 - to - 3 PSI.--Fwiw--Keoke
 
My problem came about at least in part due to the Facet pump. I have read (here?) that they make pumps with different pressure output. Perhaps I have one of the stronger ones? In very limited usage since I installed the Holley regulator I have had no further flooding. Bob
 
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