Atrox Caeda
New member
Probably more like $200 question... but yea.
Anyone know how simple it is to wire a pump to a simple switch that can be toggled in the cab?
Aux fuel tank
- Thread starter Atrox Caeda
- Start date
Probably more like $200 question... but yea.
Anyone know how simple it is to wire a pump to a simple switch that can be toggled in the cab?
Hey Tankers, check this out, maybe you all would have a use for it?
http://www.toyota-4runner.org/sale-...-filler-neck-$450-raleigh-nc.html#post1768841
(Not my listing)
http://www.toyota-4runner.org/sale-...-filler-neck-$450-raleigh-nc.html#post1768841
(Not my listing)
T4R2014
Elite Member
Look at my post on page 4.
geohil
New member
It's the ability to fill the tank that I'm more concerned about. Oregon has more ass-backwards rules about what tanks can and cannot be filled and to what amount. We don't even get to pump our own gas - and I'd prefer not to have to fill up 4 5-gallon cans so I can fill the tank on the down-low at home. So it either needs to fill off the primary tank, or tie into the existing filler neck with a valve.
A tank selecting valve should be easy to source since most older domestic pickups had saddle tanks with selector switches. So that sounds very do-able, although I'll have to upgrade the Camry fuel pump to put up with my S/C's needs.
On a plus note the tank fits nicely between the rails.
Doc2012
Senior Member
We have a term for what you guys are doing with this Aux tank thing in the Navy.
It's called "nuking" it.
You're OVER THINKING the PISS out of this set up.
Here is a cruel drawing for ya.....
It's not that hard.
Run the filler to the Camry tank from the STOCK location.
Run a line from the CAMRY tank to the STOCK tank.
Wham, Bam, Thank You Ma'am.
There is no reason to think about the evap system, because you're not modifying the tank. You're ADDING another tank, thus increasing the CAPACITY of the VEHICLE. Not the TANK by itself.
The Camry tank is just a reservoir. Nothing but 5 Jerry cans strapped to the under side of the truck.
The TRICK, is to make sure you get the transfer line at a low enough point on the AUX tank where it will get ALL the gas out of the tank.
You need a 1* drop from the damn transfer tank to the Stock tank. That's enough to keep the fluid flowing south.
The gas Guage will read full, until you use the gas in the AUX tank, and then will start getting lower because you're using the fuel in the STOCK tank.
I can see how that would be a problem for some of you, but shit, you already know the damn mileage your 4Runner gets PER TANK.
Make sense now?
It's called "nuking" it.
You're OVER THINKING the PISS out of this set up.
Here is a cruel drawing for ya.....
It's not that hard.
Run the filler to the Camry tank from the STOCK location.
Run a line from the CAMRY tank to the STOCK tank.
Wham, Bam, Thank You Ma'am.
There is no reason to think about the evap system, because you're not modifying the tank. You're ADDING another tank, thus increasing the CAPACITY of the VEHICLE. Not the TANK by itself.
The Camry tank is just a reservoir. Nothing but 5 Jerry cans strapped to the under side of the truck.
The TRICK, is to make sure you get the transfer line at a low enough point on the AUX tank where it will get ALL the gas out of the tank.
You need a 1* drop from the damn transfer tank to the Stock tank. That's enough to keep the fluid flowing south.
The gas Guage will read full, until you use the gas in the AUX tank, and then will start getting lower because you're using the fuel in the STOCK tank.
I can see how that would be a problem for some of you, but shit, you already know the damn mileage your 4Runner gets PER TANK.
Make sense now?
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geohil
New member
Of course I'm over-thinking it. That is the fun of a forum. I get 9 hours a day in front of a PC, whereas I'm lucky to get an hour a night under my truck. I like the simplicity of the plan, I'm just not sure how your set-up allows gas into the Camry tank without causing a standard gas pump to auto-stop. It would require the stock tank and filler neck to fill which usually stops all modern pumps. The only answer I see it to either valve it or daisy chain it.
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coinball
New member
Or to buy my dual filler neck :happy:
revenantdead
New member
sing toe is 100% correct. the camry tank is going to have to run independently along side the 4runner tank, like the early efi F-Series trucks that had dual tanks. flip a switch flip your source.
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Doc2012
Senior Member
YOUR DRAWING!
You DON'T fill both tanks. You fill the CAMRY tank, thus filling the 4Runner tank.
I don't understand. It's just topping off the stock tank. It's not doing anything else?
snivilous
Senior Member
Just looked at this thread and read the last few posts, so sorry if I'm reiterating...
Why not just have the two tanks level with a connecting hose, so they are both at equilibrium, then you just have to fill the main tank and it will fill the secondary tank. The gas gauge is still valid then since it just measures height of the tank, which will just decrease slower since gas will be getting sucked from both tanks at the same time (since they maintain equilibrium).
Obviously you can't switch between tanks, and if one gets punctured you're screwed, but as long as your skid plate is decent on both tanks you would be fine.
Why not just have the two tanks level with a connecting hose, so they are both at equilibrium, then you just have to fill the main tank and it will fill the secondary tank. The gas gauge is still valid then since it just measures height of the tank, which will just decrease slower since gas will be getting sucked from both tanks at the same time (since they maintain equilibrium).
Obviously you can't switch between tanks, and if one gets punctured you're screwed, but as long as your skid plate is decent on both tanks you would be fine.
Atrox Caeda
New member
There isn't any issue if they are at the same level... the trick is we are stuck on having a high and tight Camry tank above the frame rails under the bed. If it were dropped to a lower position below that it could work, but would me you lose clearance. We're all just jaw jacking and saying what theoretically works and what doesn't and why. The fact is I don't think anyone knows exactly what will happen in each given scenario so it makes for lots of opinions. Valid or not, it's good to bring up.
liveoffroad
New member
i'm very interested in this idea opcorn:
Geohil: any info on the camry tank? what year? is it v6 or 4 cyl? is the v6 tank larger? overall dimensions, pics of it mounted etc. thanks!
opcorn:Geohil: any info on the camry tank? what year? is it v6 or 4 cyl? is the v6 tank larger? overall dimensions, pics of it mounted etc. thanks!
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geohil
New member
i'm very interested in this idea
Geohil: any info on the camry tank? what year? is it v6 or 4 cyl? is the v6 tank larger? overall dimensions, pics of it mounted etc. thanks!
It is out of a 1996 4 banger. I've been crazy busy so it hasn't been mounted. I have determined I'm going to use the OEM sending unit as a transfer pump though. Gives me a little bit more flexibility mounting wise then with a gravity feed.
liveoffroad
New member
Yea i'm liking that idea more and more too. when you get a chance, can you grab the overall dimensions of the tank for me?
geohil
New member
Since I'm not at home I'll cheat. If you look in the specs of this one it has the dimensions:
PartsTrain.com - Hard to Find Auto Parts and Truck Parts -
liveoffroad
New member
^guess that is the easy way haha. 12" seems kinda deep, i wonder how much it'l hang down below the frame...
