Electric fuel pumps

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Wes
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Electric fuel pumps

Post by Wes »

I'm having fuel pump troubles.My original pump died last year so I decided to try an electric pump. I mounted it under the hood on the fender across and up from the mechanical pump. With use, the pump proceded to heat up and quit working after a short time. At first I thought it was because it was located too close to the hot motor. Now I think it has more to do with the fact that the pump is so far from the fuel tank. I have heard that electric pumps push better than pull but would the efort really cause the pump to overheat and quit? If so Is there a 24volt pump that can handle this? Perhaps a higher pressure pump?
Wes
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Re: Electric fuel pumps

Post by Cal_Gary »

My 12v pump began to die this past weekend. Initially someone mounted it up on the inner fender well and the truck kept dying. Once I relocated it close to the tank it did just fine because it "pushed" the fuel instead of pulling it. I just priced a replacement pump today at Napa-$82 that I feel is high so I'm going to shop around a bit. By the way in case you didn't know, the recommended fuel pressure PSI is 4 to 5 and 1/4 according to my 8030 manual....

I don't know about 24v pumps but am sure someone else here can answer that, as this topic resurfaces every couple of years or so.
Gary
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Re: Electric fuel pumps

Post by M37UK »

My 24v pump was mounted on the fender, close to the carb and failed 2 weeks ago so I bought a new Facet pump:
http://www.fuelpumpsonline.co.uk/facet- ... 1627-p.asp


It was expensive but I am not going to risk anything less. I mounted it on the fuel tank support bracket, in front of the tank.I bought the facet rubber mount also and the pump is pretty quiet.
These pumps are designed to push rather than pull and should be mounted as low as possible.
This particular pump also has a metal screw-off filter incorporated.

Facet say that these pumps will also stop any vapor lock problems you may have.


Cheers
Stu

1952 Dodge M37 with 1952 M101 Trailer
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8543bob
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Re: Electric fuel pumps

Post by 8543bob »

GOOD MORNING, I REPLACED MY MECH PUMP WITH A 24V ELECT PUMP ABOUT 2 YEARS AGO, FENDER MOUNTED NEAR THE CARB; NO PROBLEMS FOR OVER 2500 MILES. IT IS A BENDIX PUMP WITH AN INTERNAL FILTER/SCREEN, GOT IT FROM SAM WIERNER IN OHIO. I GUESS IT CAME OFF OF A MILITARY PIECE OF EQPT AS IT WAS O/D. I HAVE USED THESE PUMPS ON STANDBY GEN SETS AS A LIFT PUMP, NO FAILURES. OH!! I DO NOT NEED A PRESSURE REGULATOR WITH THE BENDIX PUMP.
GOOD LUCK BOB
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Re: Electric fuel pumps

Post by Wayne64 »

This what and where I got mine. 2 years in service and mounted low on the inner fender (less lift).
http://www.aircraftspruce.com/catalog/e ... tpumps.php
MY Life Past and Present
http://crayonmedia.com/wayne/
MSeriesRebuild
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Re: Electric fuel pumps

Post by MSeriesRebuild »

All electric pumps should be mounted as near to the tank as possible. None are designed for suction, but rather to push fuel.

Mounting in the engine compartment is not good because of the heat in the area, especially on the exhaust side, thus it is a quite dangerous location.
Charles Talbert
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cuz
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Re: Electric fuel pumps

Post by cuz »

As a general rule the above comments are correct but for those that wish not to locate their pumps under the truck and at the aft end there are electric pumps out there that are specifically designed for high lift from 12 inches to 10 feet.

Facet® Posi-Flo® Fuel Pumps
Image

This is an outstanding, lightweight universal electronic fuel pump with state-of-the-art design that can be used in all carburetor-equipped vehicles and also as a diesel lift pump. In many applications, the advanced technology engineered into the Facet POSI-FLO fuel pump allows for a convenient interchange with the cube fuel pump. In addition it runs quieter, 65DB, versus the noise levels exhibited by earlier competitive solid state technologies. It is rated for 6000 hours of performance. The Facet Posi-Flo Fuel Pump's self-priming capabilities provide up to 12 inches of fuel lift and no extended cranking is necessary to restart the engine if "out-of-fuel" conditions occur.
http://www.facet-purolator.com/index.ph ... &Itemid=35
Click here for more information
Click here for pdf



Facet® Dura-Lift® Fuel Pumps
Image


When you need a tough, hard working fuel pump for diesel transfer applications such as truck refrigeration units, generator sets or gas fuel supply systems then the Facet Dura-Lift is the answer. With a minimum lift of 10 feet, these fuel pumps provide outputs up to 125 liters per hour, 11.5 psi .76 bar. In thousands of proven on-the-job applications, these pumps have earned the reputation to wear the name – Facet.
http://www.facet-purolator.com/index.ph ... &Itemid=37
Click here for more information
Click here for pdf

Last edited by cuz on Mon May 09, 2011 7:36 pm, edited 1 time in total.
Wes K
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Disclaimer: Any data posted is for general info only and may not be M37 specific or meet with the approval of some esteemed gurus.
M37UK
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Re: Electric fuel pumps

Post by M37UK »

I looked at those pumps before I bought mine but it doesnt get rid of the heat problems that occur with mounting them in the engine compartment. I was having problems with vapor lock and I think it had a lot to do with the heat build-up in my inner fender mounted pump and also the fact that the pump was pulling rather than pushing.
Stu

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Re: Electric fuel pumps

Post by hbb »

MSeriesRebuild wrote:All electric pumps should be mounted as near to the tank as possible. None are designed for suction, but rather to push fuel.

Mounting in the engine compartment is not good because of the heat in the area, especially on the exhaust side, thus it is a quite dangerous location.
As Charles mentioned the electric pumps for the most part work better and most are designed for pushing fuel rather than sucking it.The benefit you get from mounting it rearward will be fuel under pressure it is less likely to vapor lock and when under suction the fuels that we have today tend to boil in the fuel lines causing vapor lock.Fuel under pressure raises the boiling point much higher reducing vapor lock conditions. The pump under the hood if it is working it is only a matter of time for the pump to fail due to pre pump fuel starvation (they don't suck bubbles very well) and over heat the pump.Bully to those of you that have gotten away with it long as you have,But you don't live where it is hot!

hb
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cuz
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Re: Electric fuel pumps

Post by cuz »

If you have a non-high lift pump that is true. If you want to pay a bit more for a high lift pump and place it on the left lower inner fender you will enjoy the same long life as the non-high lift guys with their pumps hanging below the tank and body tub.

An often overlooked benefit of using a forward mounted high lift pump is if the plumbing between the tank and the engine compartment is damaged and leaks then the rear mount pump guys will have a pressurized leak they can't see while driving and the front mount high lift pumps will simply suck air and quit forcing you out of the truck where you'll notice the fuel dripping from the damaged line.

Again this is a personal choice thing and there is no one perfect answer that fits all.
Wes K
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54 M37, 66 M101, 45MB, 51 M38, 60 CJ5, 46 T3-C
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Disclaimer: Any data posted is for general info only and may not be M37 specific or meet with the approval of some esteemed gurus.
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Re: Electric fuel pumps

Post by wvcharlie »

I replaced my fuel pump with an electric one also. It is made by Walbro that came highly recommended. I got it from a place called Go2marine. Part number is WA FRB-16-2. This is for the 24 volt system. I mounted it on the frame near the tank. It has worked great. No more vapor lock problems. You will also need to put a fuel pressure regulator in line.
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Re: Electric fuel pumps

Post by M37UK »

wvcharlie wrote:I replaced my fuel pump with an electric one also. It is made by Walbro that came highly recommended. I got it from a place called Go2marine. Part number is WA FRB-16-2. This is for the 24 volt system. I mounted it on the frame near the tank. It has worked great. No more vapor lock problems. You will also need to put a fuel pressure regulator in line.
My Facet pump is rated at 4-5 psi so I dont need a regulator.
Your pump must be higher pressure.
Stu

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Re: Electric fuel pumps

Post by hbb »

12 inches from the fuel source is what is recomended!

straight from Facet!!!






Tuesday, 03 March 2009


Here you will find typical questions about our pumps.

How should the Facet universal pumps be mounted?

Where is the part number located?

How many amps does the Facet fuel pump require to operate properly?

What size fuse should I use to install the Facet fuel pump?

Can The Facet universal fuel pump, pump diesel fuel?

Can I mount the pump in my car's engine compartment?

We recommend that you mount the fuel pump no more that 12 inches from the fuel supply (gas tank). All our Electronic fuel pumps will push fuel rather than pull fuel. Some pumps only have suction limit of 12 inches, therefore you should mount as close as possible to the tank.

Where can I get an oil pressure switch?

Operating Temperature Range for Low Pressure Pumps?

How much fuel should be in the Duralift filter bowl during normal operation?


Answer not here? Submit a question.


Last Updated ( Tuesday, 03 March 2009 )
Go to the web site and to the FAQ page it tell you all you need to know of their pumps!
hb
The wiseman who listens to his students stays a wise MAN!
Cal_Gary
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Re: Electric fuel pumps

Post by Cal_Gary »

I ended up with the Posi-flow that Cuz posted-haven't installed it yet but it's rated for 5-7 PSI.
Gary
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Re: Electric fuel pumps

Post by M37UK »

hb wrote:12 inches from the fuel source is what is recomended!

straight from Facet!!!






Tuesday, 03 March 2009


Here you will find typical questions about our pumps.

How should the Facet universal pumps be mounted?

Where is the part number located?

How many amps does the Facet fuel pump require to operate properly?

What size fuse should I use to install the Facet fuel pump?

Can The Facet universal fuel pump, pump diesel fuel?

Can I mount the pump in my car's engine compartment?

We recommend that you mount the fuel pump no more that 12 inches from the fuel supply (gas tank). All our Electronic fuel pumps will push fuel rather than pull fuel. Some pumps only have suction limit of 12 inches, therefore you should mount as close as possible to the tank.

Where can I get an oil pressure switch?

Operating Temperature Range for Low Pressure Pumps?

How much fuel should be in the Duralift filter bowl during normal operation?


Answer not here? Submit a question.


Last Updated ( Tuesday, 03 March 2009 )
Go to the web site and to the FAQ page it tell you all you need to know of their pumps!
hb
Haha, yep, thats the blurb I read before I bought mine !! :D
Stu

1952 Dodge M37 with 1952 M101 Trailer
MVT UK
SMVG Scotland
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