Holley eletric pump sometimes louder!! Like bad loud??

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340Duster247

340Duster247

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So I just got the duster together and dialing it in.
Running a holley black eletric pump deadheaded to regulator. When the car is cold started the pump has a normal holley buzz/ noise that is fine.
But sometimes when I restart the car after sitting ( engine still hot) I get a horrible High pitched whine from the pump.
Also EVERY time after I put gas in the tank, it does the same noise untill a couple mins down the road.

I'm running factory tank- 1/2 line to pump- 3/8s to filter. -6 to regulator ( dead headed) -6 to carb.
I'm running no filter before the pump right now cause I thought it was a cavitation problem.
And ideas. ??
Sounds like a run over cat!!
 
I have never liked Holley pumps, the ones i have had, have failed. It's my rule to never dead head an electric pump, i always run a return line. Sorry i cant be more helpfull,but heat will kill an electric fuel pump.
 
The other thing i forgot to mention, is i am not sure that the holley elec pump is designed for "continuous" use. I know the Aeromotive pumps had a 400 hr life span to them, that was years ago, i am sure that has been addressed. Barry grant pumps had all sorts of issues as well.

When i had my camaro, i had an SX pump on it, was designed for 1000 hp and continuous use. It took a #10 feed and an #8 return line, that hurt the pocket book. But that pump is still on the car after 10 years no issues at all.
 
Yah I'm thinking of doing a return style regulator. But wanted to ask you guys first to see if I'm missing anything.
Thanks
 
Holley's are noisey, the vanes stick inside they cavitate, just a poor design in my opinion.
 
Base the fuel pump you need on the GPH the motor requires. Things change when you get to the track, or you get the car too hook. Now the pump has to work against the Gforce as well, some pumps cant keep up.
 
the high pitch may be from air pockets. I had a blue (with regulator) and it ran funny until it was solid fuel in the line. I could tell when the carb filled when the pump dropped RPM by like 1/2. And it was loud too, not black loud but noticeable. My Red leaked and I couldnt rebuild it for less than a new one. I would rather run a Walbro style inline with a big return line now, quieter, higher volume and they are available off Ford truck frames at the wrecking yard. Keeps fuel cool too as it recirculates/filters it constantly and keeps your tank clean.
 
Ran the Holleys on a street car years ago and went thru a few of them, the damn case kept cracking and since they are made out of cheap pot metal we couldn't even weld the cracks. Finally Shitcanned the Holleys and started using Carter Competitions I am only on my 2nd one of them after many years of use. They do tend to be on the noisy side though and I will probably look into something else when this one takes a dump.
 
So, you are running a regulator without a return line? This is a great way to promote cavitation and vapor lock, as the pump cannot maintain a constant flow through the pump. If the pump is much larger than the engine requires this can be greatly aggravated.

Also, just pumping fuel heats it up. "Pumping losses."

Any chance something is restricting the inlet?
 
All of the red blue and black pumps suck. They are loud as hell even with a return. Look at the Holley 12-125 0r 12-150 if you want a quiet pump.
 
Had the same problem with a Holley years ago....noisy as could be until we got the car up to speed racing and then it would quiet down. Concluded that it was air/cavitation. Changed to the old AC farm pumps; was fine on a small engine.
 
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