Aux. fuel tank

[Ramboy]

I can get a good deal on an L-shaped transfer tank and wonder if any of you have ever used one as an aux. fuel tank? Other than putting a low-mounted fuel output, what else would have to be done?

Phil

 

[JJW_ND]

Just plumb the axillary to gravity flow into your main tank via the vent line on the fuel filler hose. No need for any filters or pumps. This has worked for half a dozen trucks we have. I have run over 8,000 gallons through mine.



We have our tanks (custom made) designed so the fuel is intake is pulling fuel directly off the bottom (90 degree elbow pointed down within 1/2" of the bottom).



With no pump you will never overflow your main tank. The flow is not fast but enough to keep up with 9 mpg (tested many times). No problems with fuel flow even in winter cold.



Put a ball valve right after the fuel leaves the axialllary tank. We add a solinoid valve downstream to allow flowing fuel on the fly with a switch in the cab.



jjw

ND

 

[Ramboy]

JJW,

Thanks. I'm gonna go for it.

Phil

 

[The Sequel]

Originally posted by JJW-ND

Just plumb the axillary to gravity flow into your main tank via the vent line on the fuel filler hose. No need for any filters or pumps. This has worked for half a dozen trucks we have. I have run over 8,000 gallons through mine.



We have our tanks (custom made) designed so the fuel is intake is pulling fuel directly off the bottom (90 degree elbow pointed down within 1/2" of the bottom).



With no pump you will never overflow your main tank. The flow is not fast but enough to keep up with 9 mpg (tested many times). No problems with fuel flow even in winter cold.



Put a ball valve right after the fuel leaves the axialllary tank. We add a solinoid valve downstream to allow flowing fuel on the fly with a switch in the cab.



jjw

ND

I'm a real novice with this stuff, so this may be a dumb question, but if you put the line from the aux tank into the vent line on the filler neck, how does your tank vent?

 

[Okie-Go]

You will love the extra distance you can travel. Especially while pulling the 5er.

 

[JJW_ND]

An additinal vent line would help the flow but it does surpising good with just the one line. I generally "hit the switch" as soone as fuel gauge gets to 3/4 tank. Flow is slow but it will rise to full. After a few times doing this it just hold the gauge steady. When it final starts to fall your axilllary is running low. Should close to 1,000 miles by now.



I have found the movement and sunlight really presure up the Axillary. Works in ones favor.





jjw

 

[Ramboy]

Sequel,

I believe they mean to use a "T" in the vent line so you don't lose your vent.

Phil