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2nd Gen Non-Engine/Transmission help with auxiliary fuel tank set-up

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2nd Gen Non-Engine/Transmission $1.42 a gallon diesel

Engine/Transmission (1998.5 - 2002) Need some exhaust info.

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I have built myself a nice aux. fuel tank from 1/8" aluminum plate.

It holds about 70 galons i figure. .

I have allways used a transfer pump to transfer fuel on the fly to my main tank. . but now i am looking for help in setting up the aux. tank as a seperate stand alone tank plumbed to my supply and return line.

Does anyone have any ideas on the best way to achieve this,,what's the best type of dual tank transfer solenoid to use??or possibly a mechanical set-up. . what's the best way to go through the bed of the truck with the fuel lines for safety. .

I have a nice and large Racor heated fuel filter i have been thinking of installing of the frame just under the box,,would make for easy filter changes.

Any helpful; info would be greatly appreciated.

P. S... i'm doing this because i am running alternate fuel in my aux. tank but thats a whole other story.

Thanks
 
Most of the auto parts stores have an early Chevy P/U electric tank valve pre 1987. This valve will have six (6) outlets. That will provide liquid and vapor (return) for both tanks. I think I would hook it up so that the switch that enegizes the valve uses the aux tank in the on position. You could also, through a relay switch the tanks sending unit to operate gauge for the tank being used.



Good luck,

Denny
 
Aux tank

i have a 105 gal tank in the bed of my RAM 2500 Dually and the way I have mine hooked up is; I Teed into the vent hose and then up to a small pump that I got at NAPA, an inline filter works well too. ;) The pump is a vibrator type and the only function it seems to serve is to get a siphon going. Then the fuel will trickle in about the same rate that the truck uses it. The guage needle seems to stand still (when pulling) and when not pulling it will very slowly fill the tank. I have heard that some RVs just connect direct to the vent tube and with a plug type cap, much like a thermos bottle cork, they fill the aux and the truck tank. Then when the guage starts down you have your standard 35 gallons remaining. I might do this. It is sure simple enough.

jbrowne
 
Using an electrically activated 6 port switching valve is the way to go - had that on my last truck - works very slick.

It's the safest way add extra fuel to the mix in my opinion.

What you do is before the main OEM tank break both supply and return lines then hook them up to the valve, then hook up the OEM tank to the ports on the valve that at "live" when the valve is OFF then hook up the AUX tank to the 2 ports that are "live" when the valve is energized. The reason I did it this was was so that if there happened to be a problem down the road (which there never was) the truck would revert back to stock per sa.

Now take this from experience - you want to PULL the fuel from the aux tank meaning don't have the fitting for "out to engine" on the bottom you need to pull the fuel from the tank because the shear weight of the fuel will and can over power some 6 port switching valves - it will flat force them open when you have around 40+ gallons in the in bed tank. I made that mistake and could not for the life of me figure out why the fuel was back feeding into the OEM tank to the point where when I took the fuel cap off that there was fuel RIGHT THERE... EEK! Finally figured out that if I ran the fuel line from the bottom (pickup) then to the top of the tank then back down to under the body that it would siphon out and over power the valve. The thought of how much the fuel weighs never crossed my mind when I was designing and building my set up.

The nice thing about having the aux tank set up like another OEM tank is that while you drive down the road you can just flip a switch and forget it until you need fuel again. Now like some of the home brew systems I have seen where they use the vent line and have to remember to shut it off so they don't overfill the tank - too much for me to remember - I like the KISS principal because once I get to singing along with the radio all bets are off...
 
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