low preasure electric fuel pump

Beater

Beater

Well-known member
did a search but found nothing im going to have to use an electrick fuel pump on my lil speedster, is there a low pressure electric pump for such problems? there must be. what shoyld we be running 2-3 pds preasure for a stock zenith carb?
 
I am running an electric pump on my speedster with an inline regulator . Still working out the psi . Right now 2 to 3 pounds is working on a model b carb. I got the regulator from speedway motors . The only thing I don't care for is the pump is running all the time. I AM TOLD THATS IS DEAD HEADING and not a problem as long as the carb float came handle the pressure, also reason for regulator. My system is 12 vo. The pump is from Macs. You might be able to find a low pressure pump from your local auto parts store. The reason I went with Macs I had no idea what I was doing with a pump set up. Now it will be off to the local auto parts store and hopefully not a long wait for the part and knowing what I am getting. Hope this was helpful. Miff
 
Beater said:
did a search but found nothing im going to have to use an electrick fuel pump on my lil speedster, is there a low pressure electric pump for such problems? there must be. what shoyld we be running 2-3 pds preasure for a stock zenith carb?
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Actually this has been discussed multiple times here. First though, are you using 6 or 12 volts? Second, as mentioned, not sure why a pump is necessary. Make a spacer out of wood, phenolic, or alloy if you want/need to drop the carb another inch +/-.
 
This is the rotary pump I have mounted between the frame edges below the weber carb on my car. I do not use a regulator.
Brand: Carter
Manufacturer's Part Number: P60504
Part Type: Fuel Pumps, Electric External
Product Line: Carter In-Line Electric Fuel Pumps
Summit Racing Part Number: CRT-P60504


Free Flow Rate: 30 gph
Maximum Pressure (psi): 4 psi
Inlet Size: 5/16 in.
Inlet Quantity: One
Inlet Attachment: Hose barb
Outlet Size: 5/16 in.
Outlet Quantity: One
Outlet Attachment: Hose barb
Quantity: Sold individually.
Racers will appreciate their low 4.5 amp draw, too.
 
I use a Holley rotary 12 volt pump on a 6 volt battery and also have a 1 ohm resistor in series with the power wire. This drops the pressure to a couple pounds and runs my 1950 Studebaker just fine. The link is a pump similar to mine.

That 1 ohm 50 watt resistor is only a couple dollars on ebay, and makes the pump run slower and last longer. It's a better deal than using a pressure regulator to block the flow of a pump running too much pressure. Remember to install a fuel filter before the pump.

http://www.summitracing.com/parts/hly-12-801-1/overview/
 
katy said:
Maybe it needs a return line, like on fuel injected modern vehicles?
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All newer cars have pumps that run all the time. The older pulse pumps shut off when the pressure is reached, but they also have contacts that give problems. I would never buy another pulse pump again after going through about 6 of them on my 1977 Renault R12-GTL back in the 70's and 80's.
 
Tom Wesenberg said:
All newer cars have pumps that run all the time. The older pulse pumps shut off when the pressure is reached, but they also have contacts that give problems. I would never buy another pulse pump again after going through about 6 of them on my 1977 Renault R12-GTL back in the 70's and 80's.
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I think that would be a soelnoid pump.... Carter still sells them new for low pressure
 
Mitch//pa said:
I think that would be a soelnoid pump.... Carter still sells them new for low pressure
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Right, my Renault came from the factory with an AC solenoid pump with a bellows to pump the gas. You knew when it quit working because you could no longer hear the clicking. I'd have to crawl under the car and tap the pump to make it start again. Also the crap gas would eat up the bellows. After 6 pumps I sold the POS car. I've never owned a car that had no fresh air venting and had very little heat for the winter, like this POS. A couple months later I saw the buyer had the car parked in the weeds.:D
 
I've had good luck with the small inline Airtex pumps. The one I have on my '55 Ford with 3 Stromberg 97's puts out 2-4 psi. (Stromberg's don't like a lot of pressure).

But no matter what electric pump you use may i suggest some kind of safety device to shut it off in case of an accident? I like the inertia switch that you can find in any late model Ford product. It will shut off the power to the pump if you get hit (or you hit something).
 
Well, I take that back. I have an Airtex Fuel Pump and Tank Level module in the gas tank of our 2001 Taurus. Been there 3-4 years now.
 
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