Auxiliary tank

[kittyjo]

Does anyone know if using any transfer flow auxiliary tank on a non diesel truck with have any problems? Most are made for diesel but trying to find one for gas that will fit underneath tonneau cover.. thanks

 

[HSKR R/T]

Does anyone know if using any transfer flow auxiliary tank on a non diesel truck with have any problems? Most are made for diesel but trying to find one for gas that will fit underneath tonneau cover.. thanks

You probably won't have any issues with operation, but legally they are against DOT regulations

 

[kittyjo]

You probably won't have any issues with operation, but legally they are against DOT regulations

Well idc that’s y I want it under the hard tonneau cover. Lol just as long as it works I’m good

 

[kittyjo]

Here’s what I’m thinking… low profile and can close the top no problem

 

[Richard320]

If you connect that permanently somehow to the gas tank, you may mess up the EVAP monitor and set a bunch of codes and check engine lights. Diesels do not have an EVAP system, so none of that matters. Also if it vents into the tank, it may overload the charcoal canister and ruin it. Trapped under a tonneau, any fumes venting may gather which would be really dangerous. You'd want to set up a bilge blower like a power boat has.

 

[bigdodge]

Gas Auxiliary Fuel Tanks - Aluminum Tank Industries

atitank.com

What is Legal?

www.attatank.com

i post this for information only

 

[Nsleone]

RDS makes a load of awesome tanks, this one sits about 1/2 inch under the bed sides with the pump’s nozzle holder removed. Though this tank won’t work because you need the longer bed but they do make a similar one that could fit.

If you’re going to go against DOT guidelines at least make sure the tank is approved to store gasoline, and put a valve on the fuel line going into the tank and vent the transfer tank out of the bed. Letting fuel transfer while the truck is running Will set off a bunch of error codes as stated above.

You’re also probably going to need some anti static fuel line to safely transfer the gasoline, unless you don’t mind your truck potentially becoming a ball of fire

Have you done much research into what size tank you want?

RDS Transfer Fuel Tanks

The RDS transfer fuel tank product line.

rdsaluminum.com

 

[Majortom]

Right up front, I have very little knowledge on this subject, so please forgive if this doesn’t make sense. But given the cost associated to having an external tank added, wouldn't it make sense to apply that money toward a 33 gallon tank which meets standards, is safer, and can allow adjustments so the the EVAP system doesn’t throw codes? I know there’s a cost differential but seems to have a safer vehicle, while retaining full use of the bed and not dealing with having to connect pump/hose, etc might be worth the extra $???

 

[kittyjo]

This is what I use on top of the 26gallon tank..2 15gallons

 

[Nsleone]

Right up front, I have very little knowledge on this subject, so please forgive if this doesn’t make sense. But given the cost associated to having an external tank added, wouldn't it make sense to apply that money toward a 33 gallon tank which meets standards, is safer, and can allow adjustments so the the EVAP system doesn’t throw codes? I know there’s a cost differential but seems to have a safer vehicle, while retaining full use of the bed and not dealing with having to connect pump/hose, etc might be worth the extra $???

Going to the 33 is definitely the way to go if you just want a little more range and more importantly need all your bed space. My bed sits empty about 95% of the time and the space the 33 gallon tank takes up vs the 26 (which is what I have) is right where my air compressor system will be going in the future. That plus the massive range bump I was looking for is why I went with an external tank. If you’re going to spend the money you get a lot more range/capacity for the price vs converting your factory tank.

 

[Malodave]

I made a tank from the Bottom 8" of my toolbox for my '08 RAM Bighorn. There are DOT regs, EPA regs,
and the trucks computer to deal with.

DOT needs OEM or better Parts. I used SS braided line with Aircraft fittings.

EPA needs you to pull from the top of the tank, you can't use a drain system.

It has to be a sealed system for the computer. So along with the Transfer Line, you
need a vent line between tanks. I ran both lines to the filler neck with the vent a little higher.
As long as the Fuel gauge goes up and down there won't be a code thrown for a Sender unit
or gauge malfunction. I can transfer mine on the fly while driving.

I am currently adding a AUX tank to my 2021 Ecodiesel of 72 gallons. with the stock tanks 33 gallons,
and getting the claimed 29 MPG that gives me a range of around 3000 miles.

Malodave

 

[ayoslickxd]

I made a tank from the Bottom 8" of my toolbox for my '08 RAM Bighorn. There are DOT regs, EPA regs,
and the trucks computer to deal with.

DOT needs OEM or better Parts. I used SS braided line with Aircraft fittings.

EPA needs you to pull from the top of the tank, you can't use a drain system.

It has to be a sealed system for the computer. So along with the Transfer Line, you
need a vent line between tanks. I ran both lines to the filler neck with the vent a little higher.
As long as the Fuel gauge goes up and down there won't be a code thrown for a Sender unit
or gauge malfunction. I can transfer mine on the fly while driving.

I am currently adding a AUX tank to my 2021 Ecodiesel of 72 gallons. with the stock tanks 33 gallons,
and getting the claimed 29 MPG that gives me a range of around 3000 miles.

Malodave

anyway we can swap the 33 gal for a bigger tank ? underneath?

 

[Nsleone]

anyway we can swap the 33 gal for a bigger tank ? underneath?

I don’t think anyone makes a larger tank for the 1500’s, most tank upgrades are for long bed (as in 8 foot) HD trucks

 

[Malodave]

anyway we can swap the 33 gal for a bigger tank ? underneath?

With the Diesel you have the DEF tank too. If I could have ordered my truck with the 8' bed and 50 gal tank, I would have done it.

Malodave

 

[ayoslickxd]

yea im gonna see only thing that sucks is i use my bed alot … and then the fact that i have ramboxes also

 

[Nsleone]

I made a tank from the Bottom 8" of my toolbox for my '08 RAM Bighorn. There are DOT regs, EPA regs,
and the trucks computer to deal with.

DOT needs OEM or better Parts. I used SS braided line with Aircraft fittings.

EPA needs you to pull from the top of the tank, you can't use a drain system.

It has to be a sealed system for the computer. So along with the Transfer Line, you
need a vent line between tanks. I ran both lines to the filler neck with the vent a little higher.
As long as the Fuel gauge goes up and down there won't be a code thrown for a Sender unit
or gauge malfunction. I can transfer mine on the fly while driving.

I am currently adding a AUX tank to my 2021 Ecodiesel of 72 gallons. with the stock tanks 33 gallons,
and getting the claimed 29 MPG that gives me a range of around 3000 miles.

Malodave

I look foward to seeing your complete setup, is the tank going to be custom?

 

[Malodave]

I look foward to seeing your complete setup, is the tank going to be custom?

Yes. it will be 20"H x 60"W x 14"D. The Filler neck will be accessed thru the Windoors of my Bed Cap.
I just need to tap a few holes for the transfer lines. Then get it to my welder.


Malodave