Been thinking about a fuel cell under my toolbox. I have 18"x60"x6" free space under there. That equals 28 gallons. Easy 550 extra miles

And i believe its 100+ gallons of gasoline is the limit for DOT without placards and HAZMAT stuff.

So time to start building! Filler cap is goin to be the trick.

 

I have to pee more often than I have to fill up.

 

Thats no excuse... you female?

 

Sounds nice. Wish I could get my wife to hold it for more than 3 hrs.

 

I have a 35 gal tank in the bed of my Dmax. With that, I can get about 550 miles towing and 1050 empty With out it, towing sucked, was looking for fuel every 200 miles! lol

With gas, transferring the fuel to the main tank is the issue. In most states, it is illegal to have a gravity transfer so you have to have a transfer pump. Then there is the evap system, have to be able to vent while transferring, then sealed up the rest of the time. The only other way to do it is if your second tank has it's own fuel pump, sending unit and evap setup like factory duel tanks. Then you just switch between them.

 

Thats kinda what i was thinking.. except run a "T" in the EVAP line and run it to a Vent. And have a stock fuel pump that will pump it into the main tank thru a bulkhead. And the "T" off the EVAP will work for a Vent for the transfer.

Basicallly when the IGN is on the pump will be on a timer so every 30 minutes it pumps for 1 minute or something like that. Roughly work it so both tanks will drain at the same rate.

 

My dad just got this installed in his Dmax, the transfer system moves fuel from the aux tank in the bed to the factory tank once the tank is at 1/4 tank and keeps doing that until the aux tank is empty. They installed a fuel gauge for the aux tank for him. His is a reg box Dmax so a 98L (26Gal) tank which like you said is crazy small capacity when towing.

 

When i was traveling with the power transformer company we had 100gal AUX tanks and they just gravity fed to the main tank. Dont open the fuel cap if the aux tank still has fuel in it



Ok so final measurements are 64" wide x 21.5" deep x 5.5" tall. With a chute on the driver side thats 1.5"x12"x21.5"

60 Gallons total. Got a freakin motor home capacity with that!!

900-1400 mile range... but then again i dont really wanna drive that far. But would be nice to fill up and drive for 2 months back and forth to work.

 

5 gal of 93 bouncing around the in the bed works for me.

 

Ive had a 5 gal plastic can catch on fire in the bed of my truck... 93oct is hard to put out with a fire extingusher.... just saying.