poor man auxiliary tank installation

[canman]

Some additional info on the HZJ79 tank.

HZ79 Aux fuel tank - will it fit

 

[goranvolvo]

I found this when searching for more info. Some pretty good info on power draw and how fast the stock fuel pump can transfer. I thought it'd be some useful info.

i don't like the idea of having two different filler necks , pressure in the main tank will build when you start the transfer by using single one you r moving fuel to one tank and air to other so pressure is equal

 

[xetura]

i don't like the idea of having two different filler necks , pressure in the main tank will build when you start the transfer by using single one you moving fuel to one tank and air to other so pressure is equal

I agree. I thought it was useful for other info, though.

 

[Dubbinchris]

Hmm, that's about 24 Gallons which is a nice size. I wonder if this tank would fit in the 80 series cargo area? PM me that info please.

Putting an aux tank in the cargo area seems dangerous.....but that's just me.

 

[lockd80]

i don't like the idea of having two different filler necks , pressure in the main tank will build when you start the transfer by using single one you r moving fuel to one tank and air to other so pressure is equal

I think he is running a second hose between the two tanks to balance the expansion. a fuel hose and a expansion hose.

 

[LandCruiserPhil]

For transfer I used a Holley Blue pump. I have a lot of experience running these pumps dry without a failure. Transfer rate is fast at ~1gal per minute. The pump is a vane, self priming design that can be rebuilt and serviced in the field. Not cheap but if your transfer pump fails aux tank is worthless.

 

[2fpower]

@LandCruiserPhil I assume this is a manual operation???

If you don't have a way to fill this tank directly, how do you plumb this to fill from the OEM tank, then as some point in time move fuel from the Troopy tank to top off the OEM tank? 2 fuel pumps?

What is the plan for a fuel gauge?

 

[LandCruiserPhil]

@LandCruiserPhil I assume this is a manual operation???

Yes I prefer to keep it simple

Factory Auxiliary Sub Tank Install
Info on how I did my transfer & plumbing

 

[goranvolvo]

i will use pump what is in the aux tank , any pump can fail but if transfer pump fails there is drain plug on the bottom of the tank take it off and fill bottle ,can or ... and dump it in main tank so there is solution
i m working on dual filler neck every time i start on it i come up with better idea
whole idea is to stay cheap and be 100 % funcional

 

[LandCruiserPhil]

i will use pump what is in the aux tank , any pump can fail but if transfer pump fails there is drain plug on the bottom of the tank take it off and fill bottle ,can or ... and dump it in main tank so there is solution
i m working on dual filler neck every time i start on it i come up with better idea
whole idea is to stay cheap and be 100 % funcional

Do yourself a favor and cut a hole in the floor to access the tank pump. I used an 8" round screw down boat on my V8 FJ60 big tank.

 

[goranvolvo]

some update ,working on dual filler neck ,almost done , did not spend enough time on it busy with other project ...

 

[mmajsw]

Brilliant idea for a DIY dual filler neck. Definitely worth copying (or at least storing for future use) if you don't mind!

 

[LandCruiserPhil]

Be careful breathing the white smoke, see metal fume fever

 

[goranvolvo]

i know , i usually grind galvanizing off and use fan when wld that stuff
and the metal pipe i 1 1/2 inch and it is conduit 6 $ so far my project is on super low budget

Brilliant idea for a DIY dual filler neck. Definitely worth copying (or at lest storing for future use) if you don't mind!

i don't mind

 

[Pascoscout]

What's the diameter on the stock filler neck piece?

 

[goranvolvo]

it is 2" O.D.

 

[rc51kid]

it is in , fits excellent all is left wiring and plumbing

Looks great! I am not questioning your design. But instead of using two separate mounts that only support it by the seam, why not run a plate under the tank join the two mounts into one mount. Come to think about it you could expand it into a skid plate of sorts to offer a little protection for the tank and mount it as well.

 

[TexasJack]

Yes I prefer to keep it simple

Factory Auxiliary Sub Tank Install
Info on how I did my transfer & plumbing

I had read this thread back when you first did it and really didn't get it. Having just re-read it I am highly interested in doing this mod. It looks very doable and highly effective!

 

[goranvolvo]

this tank was originally supported by the seam i just reused factory holes and there is another piece what protects the tank but i did not mount it for now it will be last item to mount

 

[2fpower]

Picked up one of these from a local pick and pull today. $30. but has nice drain hole they punched in the bottom

The mounts on the trooper are welded onto the frame, and the bolts come from the top, so anyone getting one from the pick and pull yard, be sure to take some Advil first or your more limber kid to help.

Anyway, watching to see how it all goes together.