Thread: Changing from mechanical fuel pump to electric

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I'm getting ready to change from a mechanical fuel pump to an electric pump. It' s a 55 Chevy 210 with a 350 and has no return line to the tank. Do I need one with the electric pump. I have a regulator in line to a Edelbrock 650 ?

i`ve been running a tiny electric pump on my 4.3 V6 pinto for 4 years .. never a moments trouble .. no return line ..`im not even sure if i used a regulator .. ` i got it at oriely`s .. i`ll check and see what it`s brand name is and if it has the reg ..

Depends on the pump, that you are going to use. And what you are using it for.But you should be able to buy a pump for that engine, that will work fine on the street. Plus be good for the track if you want to make a few passes. That will work fine with no return. Like a holley black, or mallory comp 140. They are good for continuous duty use, and work just fine on the street. If you want to step up in size a little. a BG hot rod 280 will work. Hope this helps.

Stay away from a Holley pumps--without a return line they get hot and puke out. Mine lasted a year and a half. Go with a Mallory pump at the url below. It uses a different design than Holley and it does not have provisions for a return line. Mallory pumps come highly recommended on a lot of performance forums, and it is the one that is presently on my car.

http://store.summitracing.com/partde...5&autoview=sku

Just curious why you want to change to an electric pump?
Mechanical pumps will easily support 600-700 carbureted horse power.

Originally Posted by Yellow72

Just curious why you want to change to an electric pump?
Mechanical pumps will easily support 600-700 carbureted horse power.

Yellow 77. Good question. I was given one as a gift and want to do some changes to the car. Buy the way it's a Holly Red Elec fuel pump.

I have had Stewart Warner electric fuel pumps on my cars for over 12 years and never any problems. They make a 6 volt and a 12 volt pump, no return lines. I have a pressure regulator on the 57 but it probably doesn't need one. No pressure regulator on the 34 Plymouth. Pressure max is about 7 psi, and the regulator on the 57 is set for about 5 psi.

Just to be safe I do carry a spare pump in case one would fail but only because of the age of the pumps, not the quality of the units.

Originally Posted by Jim Standley

Yellow 77. Good question. I was given one as a gift and want to do some changes to the car. Buy the way it's a Holly Red Elec fuel pump.

The red is to small.

I ran holley on my street rides for over 10 years without a problem.

I have been running a "Summit Racing" electric pump on my T with two 500 cfm Edelbrocks for well over a year now. It came as a kit from Summit Racing. Oviously the pump is made for them by someone else (probably Holley) and have had no issue and was very reasonable (Included Pump, Chrome regulator and all brackets. good deal to be sure. Don Jr.

Holley red is not too small for a 350 street motor... I was running red pump on my 427 drag motor for two years but that was borderline for racing but was fine on the street. Things to look out for are under hood temps... I'm running a Holley blue with dead head regulator and have had problems boiling gas around town driving that I've been trying to mitigate with heat shield/insulating the fuel line. I'm switching to bypass regulator with return line this offseason.... I'm looking at the BG 280 for my new system. If this is mainly a street car, why change from the mechanical pump? I know racers that are still running a mech pump for their "low end" (~12s) drag cars.

-Chris

I ran the red on a motor with 427 HP & 425 tq. It fell on its face, every time at the track, As did the holley blue. Went to the mallory, and later to the holley black testing them, back to back at the track. I picked up 3 tenths & about 5mph. With the black & mallory over the red & blue pumps. They are not a good choice, in my opinion. Just based on my findings with my car. I have head of people getting away with using them. But for my application, they did not work. No matter what it says on paper, sometimes real world results are different.

Roger That!

I'll always defer to the voice of experience. Sometimes things look real good on paper and they just don't perform under live conditions. Another glitch can be when a product doesn't perform as advertised. It sounds like several people have had problems with the Holley pumps..

Thanks for the input.

Originally Posted by Jim Standley

Thanks for the input.

Glad to be of any help. I have been down the road of spending, way to much money on parts that just did not work out.