electric fuel pump

coolcoupe

coolcoupe

Well-known member
Does anyone know how far away from the the fuel tank a person can mount the electric fuel pump ? Its really crowded space by the time I get the fuel fifter and electric pump installed.It makes for a tight bend on the fuel line.Can I install the electric pump in front of the rear axle hump and still work? Moe
 
You can locate it as far away as you want, look where the stock pump is. The issue is the closer to the tank it is and lower it is mounted the better. What you are wanting to do is reduce the "pull" on the fuel, this contributes to vapor lock. Somewhat like boiling water at different altitudes, the lower the pressure on a liquid the easier it is for it to change states (liquid to vapor) and it will do so at a lower temperature. Ideal is the pump in the tank so it is pushing not pulling the fuel. Next best is level or below the fuel level in the tank. If none of that is possible then as close to the tank as possible. Poorest location is like where the stock pump is mounted and yet they have worked that way from the day they were designed, so your call.
 
like jseery said, an electric fuel pump can be mounted any where you want it, but the closer to the fuel tank it is the better it will work
 
My pumps are located on the driver side frame rail just behind the location of the rear pass compartment.The fuel line runs along this location and allows room for a fuel filter to be located ahead of the pump.
 
Contrary to what many people think, or suggest, the best rule to follow is: "Don't let the directions on the can out-smart you".
The majority of install directions for electric fuel pumps that I have read recommend installing the electric pump close to the fuel tank with an inline fuel filter prior to the pump. Electric pumps push better than they pull.
Trainguy has his pump installed in almost the same location as the one I have in my '36.
 
Mine is right before (towards front) of rear axle.

How long do these pumps last - mine has been in for over 5 yrs
 
I have had electric fuel pumps last in excess of twenty years, however, they seem to fail in less than five years now.
If you are going to use the electric pump as an aux pump to assist with starting and/or to prevent a vapor lock, while retaining the mechanical pump located on the engine, you have to make sure the mechanical pump can pull through the electric pump. Many of the newer electric pumps will not work with a mechanical pump.
I did a lot of research on electric pumps, Carter makes several pumps that will work well with a mechanical pump.
 
I bought my 39 deluxe w Airtex elec pump in it - the car had frame off in mid 80s and that was when pump was installed. It's a flow through.

I'm curious is there rubber in the elec pumps that gas can eat away? I would have thought if yes mine would have been toast long ago
 
I made the mistake of mounting one on the firewall in a 47 sedan. It worked, but noisy, and it would cut out going up a hill.

P.S. It looked very out of place as well !
 
We use the electric pumps from C&G. They are available as 11A-9350-E6 (six volts,$70) or 11A-9350-E12 (12 volts, $62. I have one that is 20 years old, and still going strong. The usual mounting is inside the frame "kickup" ahead of the axle. Be sure to put a replaceable filter between the tank and the pump. Crud from the tank is the usual cause of pump failure. 800/266-0470
 
If you are going ahead with the electric fuel pump, I would suggest just removing the mechanical pump. The diaphragm in mine fell apart after 2 years with today's gas. Since it sits over the intake, fuel seeped into the engine.
 
Air Tex makes one I have had good luck with. It is flow through, works with 6 volt, And easy to plumb. I always install on the inside frame rail (Drivers) downhill from the tank. That way there should be fuel remaining in the line after shut down to prevent the pump from cavitating. I only use it for start up after sitting for extended periods. I don't like full time pumps because of noise, and unless you have some sort of auto shut off switch they can be very dangerous in and accident.
 
And REMEMBER a stock psi is low!! An electric pump will overpower the carbs. Put a pressure gauge on it and a control so you remove that problem!!
 
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