alright, ive installed a fuel cell with and electric fuel pump.. there is a posotive and negative wire.. does one goto the fuse panel and the other to the frame? please help!

 

(-) to a good ground and (+) to a fuse that hot with the Ing on only.. Not on a always hot Fuse..

 

I'm strongly considering putting the fuel tank back into the cab, search for donar to mount bettween rails hs not turned up anything yet. After market cost may be prohibitive.

I'm running 1990 5.0L what would be the best OEM external fuel pump to run ?

Tom

 

Im running a profuel fuel pump from Kragen ( About $120) its rated for 5-7PSI @ 30FPM of fuel.. It can handle a Holley 800 CFM carb with a good fuel reg on it

 

Are you running the Fuel injection or a carb?

 

carb, and also still have a mechanical pump on the motor

 

Ok, for a carb, I prefer the Holey Blue pump. It's a little noisy, but it has operated flawlessly for me for about 5 years now. It is also rebuildable from what I've heard. It delivers all the fuel I need in my mustang. I'm running a 351W in it along with a 125 shot of nitrous. I'm running 10.60's in the 1/4 mile at 127MPH and the plugs arent showing any sign of running lean at all, which tells me(along with the fuel pressure gauge) that it's getting the prescribed 7PSI it needs.

 

What are the requirements for psi on a carbed engine? 4 to 7 or so?
I am referring more specifically to a 351W with Edelbrock 600 carb.
Is a pressure regulator needed with an electric pump?
Can you hook up the electric pump as an inline backup to the stock pump?
What are the best brands of electric pump for carbed engine?
Best location for the pump? (I'm assuming this is as close as possible to the tank?)


I know some of these questions are answered above, but I'm sure I'm not the only one wondering about some of these questions.

Thanks, Paul

 

Paul

The Edelbrock carb is a little touchy on the fuel pressure. I believe Edelbrock recommends you not exceed about 6#. They sell an offroad needle and seat kit that I understand can help with the carbs tendency to take in a bit too much fuel. I bought the kit and never installed it yet. Every now and then my carb acts like the needle hangs open a few seconds too long. Most of the time it is fine. I am running a stock mechanical pump with no regulator.

 

If you run an electric fuel pump like the Holley blue, you WILL definatly need a regulator. With the Edelbrock carb, 6 lbs is recomended, however, with the Holleys, they prefer around 7PSI. The best place for the pump is as close to the tank as possible. You will need a fuel filter inline BEFORE the pump though. As for running int in line with the stock mechanical pump, I have no idea...I cant immagine it would be recomended, but I may be wrong....It seems like the mechanical pump would be the one to hold up the line and inhibit the flow of fuel should it need more then the mechanical pump can produce....But I may be wrong....The holley blue will handle almost anything you throw at it.

 

Hi six7seta,

I once ran a electrical fuel pump inline with a stock mechanical pump, here's a short version of my experience:
1. Any dummy knows that it's much, much, cooler to have a seperate switch for the fuel pump, rather than running it through the ignition circuit.
2. One day maybe a month or so after installing the pump, (in a motel parking lot in South Dakota on a Saturday afternoon while on a road trip from Napa Valley California) I forgot to shut off the electrical pump.
3. The seal on the mechanical pump eventually gave out & the electrical pump filled the crankcase with gas.
4. The hotel manager, who I thought was overly concerned about the smell of the gas & the quantity of gas cascading out from under my car, let me know that I had a problem in his parking lot.
5. Did you know that it's really hard to find a parts house in the middle of nowhere, South Dakota!!!
6. I'm real glad that it didn't happen while underway!!! That could have been real fun, a crankcase full of gas while tooling down the road at 60 or 70 mph.
7. In hindsight, I still ask myself to this day, why in heck did I want to run the electical pump in line with the mechnical one? And you know, I still don't have any idea why it seemed like a great thing to do.
Regards,
Jon

 

eh, i know i dont really need one... its just what came with the fuel cell when i got it... so it more of "why shouldnt i use it?" also i should mention the pump is from a 89 crown vic and is mounted inside of the fuel cell... i might just do away with the mechanical pump once i find what the specs are for that electric one.

 

I believe that the 89 Crown Vic would have been EFI so that pump is likely a high pressure pump ( approx. 40 psi ). I don't know how well that would work regulated down to approx. 6 psi.

Regards, John

 

It WONT! It will blow out the diaphram in the regulator in nothing flat.

 

even with a high flow mechanical fuel pump?