In tank fuel pump w/ aluminum race cell

Pulled my massive 32 gal tank I made two years ago. I am putting in a 15 gal alum racing cell in its place. Part of the goal with this project is modifying the new tank so that it has the fuel pump inside. (Get rid of thermal issues w/ the HP exterior pump) I picked up a stock GM TPI pump assembly and first thought of just cutting a hole in the top of the tank and dropping in the whole GM assembly. (Just bend the pick up line to match the tank) The draw back here is a very large hole + coming up with a flange system to adapt over the GM twist lock stock mounting syst. Then I would have to cap off all the extra return lines and emissions lines.

Plan B. Ok so here is what I was thinking…. The GM pump is on a rubber hose that is just clamped to a 3/8 steel hard tube. This tube then exits out the top of the mounting assembly. Why not use an AN-6 (AN-6 = 3/8") bulkhead adapter to go though the tank, then use 3/8” hard line inside w/ an AN-6 hard line adapter on it to thread on to the bulkhead mount. Then at the base of the 3/8 hard line use the stock rubber GM mount to hang the fuel pump on just above the fuel cell floor. Do you think the AN set up mounted to the alum. tank will hold up with the weight of the pump (its small but still) on the end of a hard line off road?

Only trick with plan B, I need to source a good electronics connection to go though the fuel cell. Anyone know of a good source for fuel safe electronic connections? Like the MIL stuff?

Mark

Plan B, yes the an bulkhead and fittings will support the weight and movement of the pump. Make sure the bottom of the pump doesn't hit the tank floor, it will eventually tear the sock/filter and clog the pump. I considered doing this as well, but wasn't sure where the best place for the pick up to be. Perfect soultion would be in a bowl like sump right in the middle, to retain fuel to the pump when the tank is low and inclined.

Keep us posted on the electrical connectors you use. The tank will build some pressure unless vented to the atmosphere.

Plan B, yes the an bulkhead and fittings will support the weight and movement of the pump. Make sure the bottom of the pump doesn't hit the tank floor, it will eventually tear the sock/filter and clog the pump. I considered doing this as well, but wasn't sure where the best place for the pick up to be. Perfect soultion would be in a bowl like sump right in the middle, to retain fuel to the pump when the tank is low and inclined.

Keep us posted on the electrical connectors you use. The tank will build some pressure unless vented to the atmosphere.


Yes I am thinking plan B would work the best as well. Absolutely would keep the bottom of the pump off the tank floor. You are right the soft pre filter would tare up easy. For the pump location I was thinking in the rear would be the best location. We seam to spend the most time climbing stuff, and if fuel starvation happed and I had to pick I would prefer it to be going down somthing. (On average)

If I can not find the right electrical connections I may just adapt over the GM ones. In looking at the stock unit it just goes though a hole in the pick up mounting plate. It uses a simple gasket on top and a slide over crimp mount to hold the plug in place. I will price them both out. I have seen nice MIL bulkhead electrical plugs, I just have to find one that is fuel safe.

Mark

79' FJ-40'ish, Rolls Royce/Allison 250-C20B,

Have you ever explained this signature? If so I must have missed it.

Have you ever explained this signature? If so I must have missed it.

This is the rest of it:
79' FJ-40'ish, Rolls Royce/Allison 250-C20B, Maximum Gross Weight Internal Load: 3200 Lb (1451.5 Kg) ,Fuel: Jet A, 96.7 US Gallons ,Cruise Speed: 115 Mph Heater & Defogger, Particle Separator, Snow Baffles, High Skid Gear, Skis with Pax Ski Holder, Cargo Mirror, Cargo Hook

This is a description of a particular Bell 206 Helicopter. :D

But I think a Rolls Royce/Allison 250-C20B turbine engine converted over to diesel powering a generator would be cool for an eclectic hybrid crawler. Mmmm can you say variable wheel base! And think what that sucker would sound like snaking up the Proving Grounds! Too bad you would need a good 80-100 gallons of fuel per 5hrs. :shaking:

Mark

I am seriously considering going with your option A. I don't like option B. Too complicated for replacing parts in rural mid-America. I want to be able to just hit a Napa, buy an OEM part, slap it in and keep wheeling.....

Ed

I am going to install an in-tank pump in my factory steel tank over the winter, come hell or high water......I replaced one in Moab, this is 5 external pumps I have gone thru in less than one year of TBI on my truck.
All but 2 under warranty but I hate having trouble on the trail.
Butch

I am going to install an in-tank pump in my factory steel tank over the winter, come hell or high water......I replaced one in Moab, this is 5 external pumps I have gone thru in less than one year of TBI on my truck.
All but 2 under warranty but I hate having trouble on the trail.
Butch

A lot of people complain about my holley projection fuel pump because it has a high pitch whine. This pump has always been noisy for the last 4 years. I never had any problems with it except the noise. I'm afraid to swap it out with something like a E2000 pump because I'm seeing posts about their pumps failing....

Butch, where is the pump mounted? Mine is just below the tank and it is pretty much pushing the gas the whole time.

Any other alternatives for inline pumps that are reliable? I don't give a rat's a$$ about the warranty if I have to keep replacing it.

Mine is right below the tank also ,and has had the ES 2000 and a couple of other variations....all mine whine also.
In the tank for me OEM GM.
Butch

A lot of people complain about my holley projection fuel pump because it has a high pitch whine. This pump has always been noisy for the last 4 years. I never had any problems with it except the noise. I'm afraid to swap it out with something like a E2000 pump because I'm seeing posts about their pumps failing....

Butch, where is the pump mounted? Mine is just below the tank and it is pretty much pushing the gas the whole time.

Any other alternatives for inline pumps that are reliable? I don't give a rat's a$$ about the warranty if I have to keep replacing it.

I have been running a Volvo 740 Tubo pump assembly for the last three years. (over 100PSI and more GPM than my 383 can take) This external set up uses a massive bosh HP filter that is built into the OEM rubber isolated mounting bracket. The problems I have had with this set up is the darn HP pump on really hot days on long runs thermo’s out. Pack a few shop rags with ice and the sucker is back on line tell the ice melts. Runs great in 95% of the areas I wheel but I hate having heat issues!

With the in tank set up I think I will eliminate most of my heat issues by getting this unit in the fuel.

Rock Taxi, I agree but really the only ware point would be the pump. Since I am using an OEM GM pump the basic NAPA’s should have it. But I will have one in the box on board or on the trailer too! :D No pump no motor for me!


Mark