Aux fuel tank

Brilliant said:
I aim to have mine sorted in the next couple months. Aux tank (small) in addition to main tank.

I was looking to get a Hilux hatch to move the tire, but I can work the tank now and move the tire later.
Click to expand...

[MENTION=74071]Brilliant[/MENTION], I have read enough of your posts to know you are WAY smarter than me! Do you have any ideas of how to fill the auxiliary tank?

And will my idea work?

Thoughts.
 
geohil said:
I've been collecting parts for this too. So far I've found the older Camry tanks fit nice in the spare tire location AND if you can find one with sending unit still functioning you could use that as your transfer pump.
As far as filling I purchased one of these JEGS Performance Products 30861, JEGS Cast Iron Exhaust Cutouts | JEGS Performance Products
but have yet to test how it manages the flow of the liquids instead of gases.

Your post did get me thinking. What about a reversible transfer pump. Turn it on as you are filling your primary tank and it fills the aux tank. Then when the additional fuel is needed flip the switch so the transfer goes from aux to primary. Only down side I see is the need to tap your primary tank, or share your main sending line. Thoughts?
Click to expand...

[MENTION=104746]geohil[/MENTION], I like that idea. The only potential problem I see, is how do you know when auxliary tank is full? For example, if I am on the trail and off camber, and flip the switch to send fuel from aux tank to factory tank, but it doesn't drain it, then I go fill aux tank and think I had emptied, but it has a gallon or 2 still in it. Where would the 'extra' fuel go?

Plus, my wiring skills are very elementary. So I'm trying to keep this as simple as possible.

Durwin
 
owyheerat said:
[MENTION=104746]geohil[/MENTION], I like that idea. The only potential problem I see, is how do you know when auxliary tank is full? For example, if I am on the trail and off camber, and flip the switch to send fuel from aux tank to factory tank, but it doesn't drain it, then I go fill aux tank and think I had emptied, but it has a gallon or 2 still in it. Where would the 'extra' fuel go?

Plus, my wiring skills are very elementary. So I'm trying to keep this as simple as possible.

Durwin
Click to expand...

Assuming you have your tank vent lines tied together with say a T-fitting, the extra fuel would just back up the vent line and be carried by gravity into the other tank (unless there is a one-way valve I'm forgetting).

I have to build my swingout to make room, but once that is done I'm all in on this project. I'm done with jerry cans.
 
owyheerat said:
[MENTION=74071]Brilliant[/MENTION], I have read enough of your posts to know you are WAY smarter than me! Do you have any ideas of how to fill the auxiliary tank? And will my idea work?

Thoughts.
Click to expand...

I can show you what I'm thinking. Not really mature enough to post though. I think you're on the right track.

The only technical issue I found with an aux tank is integration with the main. Its really easy to solve imo. I've seen a lot of really complicated discussions, and its really not that difficult.

I'm going to use a prado 90 style filler top graphed onto a 3rd gen tube. Its a hole/tube for each the main and aux tank. A simple switch to control a pump from the aux to a tap on the main fill tube. No issues that way except a bit of time to pump from the aux to the main. Overfill just recirculates but cant overpressure anything. AU designs are like this.

I've got to drop by death's and get a tube to modify. The tube is the only piece that will require much effort.



Prado 90 filler (right side pic 1)
16533619199_89451cce6d.jpg

16532175988_7689e71703.jpg

16533618709_c64676374c.jpg

T ap to the main fill tube looks like this
16097584684_43e148b0a1.jpg


My OE sub tank switch from down under
16099809743_3214db9072.jpg


variable resistance and set points red LED gauge I will integrate with the aux sender and put in an OEM switch blank.
16718510891_80f313d732.jpg
 
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Only problem I had with that was the cost. That Prado or LC filler valve is $$$ if not $$$$. I love my truck but there is a limit.
 
geohil said:
I've been collecting parts for this too. So far I've found the older Camry tanks fit nice in the spare tire location AND if you can find one with sending unit still functioning you could use that as your transfer pump.
As far as filling I purchased one of these JEGS Performance Products 30861, JEGS Cast Iron Exhaust Cutouts | JEGS Performance Products
but have yet to test how it manages the flow of the liquids instead of gases.

Your post did get me thinking. What about a reversible transfer pump. Turn it on as you are filling your primary tank and it fills the aux tank. Then when the additional fuel is needed flip the switch so the transfer goes from aux to primary. Only down side I see is the need to tap your primary tank, or share your main sending line. Thoughts?
Click to expand...

Did you fit a camery tank yet? Got pics?

geohil said:
Only problem I had with that was the cost. That Prado or LC filler valve is $$$ if not $$$$. I love my truck but there is a limit.
Click to expand...

yea, plan to make my own.
 
Last edited:
Brilliant said:
Did you fit a camery tank yet? Got pics?



yea, plan to make my own.
Click to expand...

I've dropped my spare and jacked the tank into place to test fit it, but have yet to secure it. I did not take pics of that. Right now the tank is just taking up space in my garage. I just got my steel and tubing bender set up for building my tire swing out so that project comes first. I'll take pics when I start to fit the tank but I'm sure I'm a month away from starting. Still am thinking up ways to fill the Aux tank though. Trying to snake a 2 inch filler tube between the body and frame and around all the suspension parts will be a nightmare. Using a smaller line and pump to fill it off the primary tank sure sounds better.
 
So I am on board with this whole camry tank thing. LKQ has got a sale kicking next month so I will be headed down to scalp me some parts.

On the list are a few items but the camry tank is among them for sure. Since the filler is on the wrong side I was thinking something like a flexible filler hose might be able to correct that deficiency without having to do welding and the like. I'm going to have to do a body lift anyways so I should have room to tuck all that up and still have room not to kink the hose.

BTW not looking to add a tank....I'm just replacing. I have a 4 banger gas sipper so not too worried about the range.
 
So online by me right now has an 2000 f350 tank I'm looking at seeing how big it is. Probably damn huge but we will see.

Edit. 31x29x15 is about the same size as the spare tire.
I think I can I think I can.

d4b6b5cc34442a41ce517f5fb8f69b6f.jpg
 
Last edited:
I'll tease this a bit. 20 gallon tank with sending unit out of a Cherokee, 68 lbs of steel plate, bunch 'o tubing, marine gas fill neck. Hmmmm....

Don't worry more pics to come. 38 gallons total!
 

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Yes...finally!

@ Geohil, I'm interested! I've been considering this mod for months, but haven't made the time to get it done.

I want pics and details. :bigok:

Durwin
 
OK - the marine grade filler neck I needed just came in. Tonight I have to cut our the cross-member that holds the spare tire for clearance. I'm trying to figure out if I need to weld a new tubular cross-member in a different place or if I can rely on the huge piece of plate steel that will act as my skid to stabilize the frame. I'm leaning towards the plate since the tow package also acts as support.

I'll get pics of the process throughout this weekend.
 
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