Hello,

I am going to redo my current fuel set-up for next season. My question is this...

I have a stock fuel tank in my '77 that is currently feeding a Carter electric fuel pump. It is hooked to the factory 3/8ths line. What I would like to do is add another fuel pump (hi volume/hi pressure type) that I can feed into a seperate fuel line for when I race. My thought was to run the two lines to a regulator, then into my Mighty Demon carb.

Does anyone know if it would work to add a fuel pickup point to the bottom of the factory tank to feed the added fuel supply? I realize that I will need to remove the bladder that is currently inside the tank. The bladder is starting to shrink up...it now only holds 14.1 gallons instead of the stated 17.0 gallon capacity.

The current Carter pump was working on the street, but at the track this season I was running it out of fuel at the top of 2nd gear. I have an extra new Carter (backup unit) that I thought I would install for normal driving, but install the new (hi volume/hi pressure unit) to only activate when racing. Any thoughts?

Any help would be appreciated.
Thanks, Jeff

 

Don't know what you mean by hi pressure, you only need so much.
If your going to add a pump why not just replace the one you have.
Why run 2 pumps?

If you already have a new carter maybe the old one is shot and just needs the new one?

 

Thanks for the input. Here is a rundown on my situation.

Last season my best et was a 11.88 @ 116.12 mph. Since then I freshened the engine with a valve job, new springs, rings and bearings. I also removed just over 100 lbs of dead weight.

This season the one chance I had to take it to the track I got a best of 12.599 @ 106.47 mph. The car was laying over as it shifted into high gear. It quit pulling.

I checked my Mighty Demon and found that the secondary was empty and the primary was very low. When I got the car home I unhooked the fuel line from the carb and tested my fuel flow. I was getting only 1/2 gallon in 40 seconds! I then tested before the fuel filter, no difference in flow. BG states that I should be pumping 1 gallon in 20-25 seconds.

The pump is a Carter rated at 7 psi. My idea is to use the new Carter I have laying in the garage for day to day driving. In nice weather I drive it to work a few times a week (about 20 miles each way). Then run a seperate pump and line to a regulator just to use for racing. I would set the regulator at appx. 7 psi. I thought with the seperate fuel system I would add more volume at the same pressures. I like the idea of having the option of a backup pump for reliability. My friend next door wires up police and trooper cars for a living. He will be hooking them up to relays and installing the electrical part of the system.

Thanks again,
Jeff

 

Electric pumps don't like to sit for long periods of time, they will gum up and fail. It's better to put 1 good pump in and run it regularly. I may be going back to a Nascar-style mechanical pump primarily 'cuz I don't drive it often enough to keep fresh fuel in the pump.