Custom SS 15 to 22 Aux Gallon Fuel Tank

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cruiserdan said:
Factroy tanks always draw fuel up and out as opposed to going out the bottom. There may be a statutory reason for that but I don't know for sure.
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My guess for this is probably to extend the life of the fuel filter. If the fuel were drawn out from the bottom any sediment would be picked up and carried to the fuel filter. I guess you could raise the pickup to alleviate this though, however since you need a pump to get fuel to the engine you might was well put it out of the way on top of the tank.
 
We can do a top feed with a pump. I was going for simplicity. It would feed from the bottom of the sub to the bottom of the main thru a machined fitting.
These are in use in Africa on 80's as a kit. For the charcoal canister the system use the vent on the sub to the canister and disconnects the main.
 
I'm actually in favor of a simple system so the gravity feed sounds nice, especially when you mention 'machined fitting'. This implies less hack work.

I guess another concern with a gravity feed, other than the tanks draining together, would be the unintended filling of the aux tank when on an incline therefore starving the engine of fuel.
 
In a gravity feed the lower tank gets the fuel. If the aux is below the main because if a steep incline, the fuel will go the other way.
 
should be easy to find a one-way valve, though, that would take care of that
 
A one way fitting should keep this from happening, correct. I would think if you just put in a one way valve inline this wouldn't be a problem.
 
most check valves require some degree of force to open. with pressurized fuel tanks that have to share filling and venting that may not happen.
 
I know this was gone over before and I believe CDan did the leg work on it but, as Topend asked above, does Toyota even make replacement tanks for the overseas vehicles? How about the 105 series trucks? Could a motivated Aussie help out? Again, I remember the board going to this road and the question was nixed, but heck CDan discovered we were incorrect in our assumptions in the filler neck. I'm sure it's cost prohibitive, I just cannot remember the answer.
 
clownmidget said:
I saw Mark's truck and aux tank in person on Monday. It is pretty sweet. No pics but it sits flush with the bottom of the frame rails. No skid plate. Looks like it made routing the exhaust a little bit tougher. Still very nice but it didn't look cheap :rolleyes: Maybe Mark will post a pic and a price, I forgot to ask.

BTW, his truck is very well setup with a s/c, davis radiator, 4+ rear bumper, etc. as his sig line indicates. Very clean ride.
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I'd still like to see pictures so I can get an idea for fabrication.

:cheers:
Dave
 
I will snap a pic as I'll be in his neck of the woods for work for this entire summer. It was aluminum I remember that and it looked vulnerable since it didn't have a skidplate and sat completely flush with the frame rails and went from one side to the other.

For your fab concept I'd vote to source the float/sender unit either used from a junked 80, new from Dan or cross-referenced from another more available Toyota. Then just copy the fxn of the oem aux tank and use the same kind of xfer pump, etc. that Dan used. The dual fillers show up on MAF's site even if they are a mint :rolleyes: I still think this would run almost a grand by the time you've got it entirely finished this way though but you'd get a bigger tank than the oem and smaller than the low hanging LongRanger - maybe just right.
 
There are some custom tanks out there. There are after market Gravity feed and simple pump to main tank sytems. There is no of the shelf set up for a 80 gravity feed that I have seen in the states. There are over seas not here. There are Gravity feed off the shelf sytems for fourunners and 40 series cruisers here in the states. The fourrunners sytems seem to work fine. I am sure there are trade offs to a feed tube and a pump. I was told that there was some type of flapper valve and baffling to minimize any back flow. Not sure how well it works.
 
Has anyone looked at these
http://www.fuelsafe.com/
I did a design for my taco and even though I didn't do it the concept seemed sound. Regardless what product I went with I was going to skid plate the tank.
They have cool thumb sized pumps that I thought was a good way to go. You couldn't beat the weight...and the savings could be poured into a skid plate.
Good discussion...I am waiting on the pics as well.
 
I have talked with them and another mfg in Oregon. They both are willing to make a custom tank.
 
I have been following this discussion with great interest. The fuel capacity is one of the only disappointments I have with my 80.

Couple of my personal considerations: Rear tank, behind the axles + rear end collision = BOOM!! giving new meaning to family BBQ. Getting past that (denial is not a river in Egypt), if Toyota makes solutions to this problem of fuel capacity why can we not, as enthusiasts, get real access to them? Is there a reason Toyota does not make these kinds of parts available? US laws or something?

I read in TT about the new FJ Cuiser and how Toyota let all these aftermarket people have access to it to take measurements and such. Ostensibly this was because of their recognition and support of the enthusiast base. Maybe this was just a PR/marketing stunt, but my 162K 1995 FZJ is pretty good PR for Toyota, too. Is it too much to wish for a well-engineered (read SAFE) solution to this issue from the home office?

Sorry about the rant, I continue to follow this subject with interest.
 
There IS a factory auxiliary tank, just not over here.
 
cruiserdan said:
There IS a factory auxiliary tank, just not over here.
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I know about the optional auxiliary tank that was/is available in other countries. My question is where can I get the new, factory parts for my truck? If not, why not?
 
You can get new parts from any dealer in the market area where vehicles factory equipped with those parts were sold new. IE OZ Toyota dealers.
Not the answer you were looking for but the short version.

Because of a number of reasons, including vehicle testing, marketing protection, government regulations ETC, Toyota will not export parts to a market where those parts were not used to begin with. One thing they really monitor is grey-market transatcions. An example would be a US dealer buying case-loads of Diesel filters and then exporting them to Africa, cutting out the African distributor for Toyota. Contractual obligations require that not happen.

In the case of the OZ tank, that particular set-up has not been crashed into a concrete wall (a US concrete wall) and been blessed by US regulations. It doesn't matter that it was flattened against an Austrailan concrete wall...:rolleyes: If TMS USA were to sell replacement parts for someting that was never here they would open themselves up for our litigious culture here the first time a botched install burned to the ground.

Historicly Toyota has "helped" transient owners or owners who have privately imported vehicles obtain non-import parts in order to repair the vehicle. It has to be demonstrated that the vehicle is licensed in the US or is here on a genuine visit in order to get parts ordered. The parts are ordered "off-line" and are not warranted, are non-cancelable and are non-returnable. The process can take up to several weeks to conclude.


D-
 
Thanks Dan. I really appreciate the good info. :beer:

The safety standards are important to me and some of these auxiliary tank solutions do not impress me in that regard. The exception might be The FuelSafe people. A racing derived fuel cell might be better than stock. They have a dealer in Ashland, VA about an hour and a half from me. I will see what I can find out.
 
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What does an OEM aux replacement tank cost an Aussie? If I go over seas and stop by a Toyota dealer, order a tank, and ship it home I wonder how much I'd be out? (Assuming the trip over seas is free.)
 
OEM fuel tanks average 300 to 500 dollars. To that you would add straps, sender, neck, hoses and so-on. I would guess it at about 1200 to 1500 bucks by the time you were done.
 
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