Gas tank in place of spare tire?

[farmerjohnson]

Has anyone done this? I am thinking of using a xj gas tank and hang it between the frame rails. I have never been a fan of side saddle tanks.

[AwesomeJ10]

well it's certainly possible to fab up some brackets and put an xj gas tank in there.

But I think that many folks who swap tanks use one from an 80's suburban as they pretty much fit right in and hold more gas.

[FSJ Guy]

The 91 S-10 TWO DOOR gas tank works well, too. See my sig link for details. But it's less capacity than the Sub tank.

[243]

What did you do for the fuel gauge?

[FSJ Guy]

Stock fuel gauge reads the same "direction". It's just off a bit. If you're really worried, you could put a resistor in-line, but I never did.

[243]

I am surprised the stock gauge works with the blazer sending unit (240-33 ohms).

After I posted I called autometer and was given two options to the 3316 sport comp gauche I bought., use sender 3262 or the programmable fuel gauge that retails for 129.

I do plan to use autometer gauges so no money wasted at this stage.

[Tad]

Mid-90's S10 tank here also, about 20 gallons.
Kind of skimpy but the pre-75 rigs have a different rear cross member that limits space so it's fine.

What did you do for the fuel gauge?

Mine has never worked, I have never cared.
After 120-140 miles, find gas soon.

[farmerjohnson]

Good info. I'm gonna research on the suburban tank swap

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[sonoraed]

In the middle of installing a 42 gallons tank from a 99 burb in my 79 J10 fits just about perfect and notched out in the front corners to clear shocks,going to cut a access flap in the bed to gain access to pump, only thing I'm not sure of is if the TBI fuel pressure regulator (adjustable ) will work will the vortac pump (a lot more pressure) wonder if anybody has done this before and if it works?

[243]

The pump does not make pressure, just flow, the fuel pressure regulator creates pressure so you should be fine.

[XJChad]

What about using the 2 door Tahoe/Yukon tanks? They are 30 gallon tanks and by the measurements are a little smaller than the S10 tanks, except for the depth which is 14". I like the idea of 10 gal more fuel.

The next question would be, which pump would be used? A pump for the 5.7L Tahoe? A truck pump? Would the stock 5.7L pump work with the 5.3L wiring?

I wanted to throw that in there because I was getting ready to buy an S10 tank when I saw the Tahoe tank size and was curious why it isnt used more often. I understand it effects ground clearance in the rear, but I don't think it would hang down that low from the measurements I have taken on my Wagoneer.

I don't mean to take over your thread.

[farmerjohnson]

What about using the 2 door Tahoe/Yukon tanks? They are 30 gallon tanks and by the measurements are a little smaller than the S10 tanks, except for the depth which is 14". I like the idea of 10 gal more fuel.

The next question would be, which pump would be used? A pump for the 5.7L Tahoe? A truck pump? Would the stock 5.7L pump work with the 5.3L wiring?

I wanted to throw that in there because I was getting ready to buy an S10 tank when I saw the Tahoe tank size and was curious why it isnt used more often. I understand it effects ground clearance in the rear, but I don't think it would hang down that low from the measurements I have taken on my Wagoneer.

I don't mean to take over your thread.

Don't sweat it. I'm curious to. It will help me decide which tank to go with.

[Stuka]

What about using the 2 door Tahoe/Yukon tanks? They are 30 gallon tanks and by the measurements are a little smaller than the S10 tanks, except for the depth which is 14". I like the idea of 10 gal more fuel.

The next question would be, which pump would be used? A pump for the 5.7L Tahoe? A truck pump? Would the stock 5.7L pump work with the 5.3L wiring?

I wanted to throw that in there because I was getting ready to buy an S10 tank when I saw the Tahoe tank size and was curious why it isnt used more often. I understand it effects ground clearance in the rear, but I don't think it would hang down that low from the measurements I have taken on my Wagoneer.

I don't mean to take over your thread.

The issue with the Tahoe ones is they hang way below the frame. A body lift lets you raise it, but then you have to deal with the issues of a body lift.


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[XJChad]

Ok, yea I measured under my Wag and it would put the bottom of the tank just above or right at the lowest point on my receiver hitch. I dont really want to fool with a body lift either.

[mattparliament]

this is how I did mine!

http://www.ifsja.org/forums/vb/showthread.php?t=168517

[XJChad]

I have found the 81-86 model Suburbans had a 25 gal tank which shows a depth of 10". The only issue is those were carb'd and not injection. Does that matter? I know it would mean the tank doesnt have baffles, but I have read that the baffles aren't a huge issue. Has anyone ran a tank for a carb set up with their vortec swaps?
Any idea of which fuel pump/sending unit would be needed?

[243]

Are you planning to relocate the fill tube?

[XJChad]

Good point. No I wasn't going to and hadn't looked at where it came in at. I was looking at deminsions. I just hate that the S10 tank is 20 gallons. We plan on driving long distances, but I think Im gonna have to give in and go with what has been proven to work.
Thanks for pointing that out.

[243]

I am with ya, it would be nice for at least 25 gallons, there is the 40+ gallon Suburban tank with more work.

I will be 50 in a few days, 300 miles between whizzes is a stretch so I don't worry about it so much

[XJChad]

Haha, yea I dont want to get far enough into it to do a 40 gal.
When my wife is with me we have to stop about every 150mi anyway... so 20gal will work if it has to.