electric fuel pump

RonS

Is anyone outthere using a rotary vane electric fuel pump either as a additional or as a primary fuel pump on a 6volt car?What brand and model # is it?

[Deleted User]

Ron,



I have one of these on my stepdown and 36 Terraplane

.http://www.fifthaveinternetgarage.com/ Fifth Ave. sells these.

Park_W

I have a Carter rotary vane pump on my (6v) '47 C8. NAPA has these ... they're about $95, available in both 6v and 12v versions.

RonS

First, Thanks for your suggestions. Park, that model is a Carter GP 4259 in 6v and it seems the best of a small lot. I had a Airtex solenoid pump on my Hornet but after 6 or 7 years it "slowed" to the point of virtually no output. So I purchased ( this is to answer Scott) from 5th Ave , one of his pumps and installed it behind the floor riser in the trunk by the gas tank. But, this is not a rotary vane, it is a carator or gear driven pump. It seemed familar. I looked it up and indeed it is a Carter P60430. When I inquired from Federal-Mogul they said it is a 12volt pump, Randy Rundle stated not to worry, it will pump 15gph instead of 30gph.Ok, but won't the resistance cause the pump to over heat? He said no. So far so good. I suspect a problem forthcoming, so I am checking out my options. What do guys think? In adding to Walt M., that restricted Airtex is what was causing my fuel starvation. The pump hummed along but put out nada, and blocked the line to boot. Ron

nick s

Ron, what he told you makes sense. With DC motors speed is roughly proportional to voltage i.e. halving the voltage cuts the rpm's in half. Each revolution of the pump puts out a fixed volume of fuel so you will get roughly 15 vs 30 in this case.
I say roughly proportional because the motor is probably more efficient at the higher voltage and the pump may be more efficient at the lower speed but ignoring that amps will remain constant. The amp draw is a function of the torque output (which outside of the loses at each speed) is constant.

RonS

I noticed that the current draw was less than what should have been double at 6v, I believe 5.5-6 amps actual. It should have been 9amps, a bit high with all accessories running. But I'll leave well enough alone. Thanks.

jjbubaboy

Hey Ron,

I put one of those Carter P4259's on my 36T as a fix for vapor lock and it works great! I got it from NAPA and is was only about $65!

Jeff

RonS

That's cheap! I see 'em for $95-100.

[Deleted User]

NAPA just quoted $56.10 delivered.

Edwardjohnsr

Ken,

What is the NAPA part number for the fuel pump?

Thanks,

Ed

[Deleted User]

Edwardjohnsr wrote:

Ken,
What is the NAPA part number for the fuel pump?
Thanks,
Ed

Ed I asked them for a Carter P4259.

junkcarfann

Does anyone have any experience running a Carter rotary pump 6volt on 8 volts?



I put one in and it lasted about a month...been too busy to do anything about it, but it is definately dead...I wired it direct to check.



So are you guys saying that I should put a 12v in to not have that happen again?

RonS

I don't believe that the P4259 (rotary vane 6v) can run on a higher voltage.They are made for 6v.However, the Carter P60430 is a gear driven 12v which I can attest to , runs well(@15gph) on 6v, or any volts less than 12v.Read earlier replies and sellers.

Park_W

Just about anything that's advertised as 6v will run on 8 without problems. But if you're running an 8v battery, the generator is probably set to about 9.3, which may have fried that 6v pump. A 12v unit should work fine in that 8v (9.3v) application.

junkcarfann

Thanks everyone....will get a 12v pump.