Anyone out there upgraded their fuel pump to a high flow pump? I replaced my pump about 6 years ago and was considering upgrading it to a Holley performance pump. If you have replaced it, is it worth the $$$?

 

I'm interested in hearing the answer to this as well. With my new engine that ha s a Holley Street Avenger 670 (per builder's recommendation), I went with a stock replacement pump in my '65 because I like the integrated canister filter. Because the spec on the fuel pressure is only supposed to be 6-7 psi if I recall correctly, I didn't think a high performance pump would be necessary.

Did I screw up?

 

Yeah, those specs sound about right to me. The performance pumps usually run anywhere from 6.5 - 8 psi and flow about 80 - 110 gph (free flow). I am not sure what the freeflowspecs are on the stock type pumps.

 

"Maybe" worth the money. My stock pump crapped out. So I replaced it with a high performance Holley pump that puts out about 6.5 - 8 psi consistently. The problem is, I have an Edelbrock 600 carb that doesn't like that much fuel, so I get engine run-on (i.e. dieseling) sometimes when I shut the car off. I'm about to install a Holley fuel pressure regulator to get the psi down to no more than 6 psi (where the Edelbrock likes it).

Bottom line - if you're running an Edelbrock carb, check the psi limits before you buy a high performance pump. If you've got a Holley carb, then you're likely fine without a regulator.

 

I run electrics, Carter street pumps on the milder stuff, and full out get stupid expensive and feed enough fuel to drown the Nile systems in the more racy stuffs..

If you are still near stock a nice mechanical pump will work, although some dont really make an improvement. Electrics can be loud if not mounted right, and or if you have a quiet car. I have one aftermarket pump that drains the fuel bowls overnight. Does it with everything I have put on it, so I needs to change that pump.. strange I know...

 

My only experience with an electric pump and a carb didn't work so well. It delivered the fuel just fine, but that damn whine drove me bonkers. It wasn't the way it it was mounted, the pump itself was just noisy! [:@]

 

My uncle put an electric pump in his 39 coupe. He's tried different mounting location, rubber mounts, mounting orientation. No luck still whines. I think its like you said just a loud pump. If you go electric I'd do some research on the perticular pump your looking at first.

 

I have a question abotu fuel pumps. When using nitrous, willa stock fuel pump be able to put out enough to power both the nitrous line and the carb line? Ive heard that a lack of fuel pressure, can lead to less fuel in the mixture( and that extra NOS) will help melt the pistons? Anyone used NOS and knows about fuel pumps? -Jon