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Unread 08-30-2009, 11:29 PM   #1
PrinceBondar
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Using under body space - battery and/or air tank?

So, when I was under my Jeep changing the diff fluids the other day, I was admiring all that underbody space. I was wondering about using some of it for a second battery (I don't see any way to get one in the engine bay) and/or a small air tank (for example, Sears has a 135psi, 5 gallon tank for $25 - Craftsman 5 gal. Horizontal Air Tank, 135 psi), or possibly a PowerTank (CO2).

Thoughts?


Last edited by PrinceBondar; 08-30-2009 at 11:54 PM..
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Unread 08-30-2009, 11:59 PM   #2
SaharaBlackNo1
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Benchmark Designs makes an underhood dual battery kit:


I don't know that anyone has thought to run anything extra under their JK, especially a tank that probably wouldn't take too well to being beat up, considering the contents are under pressure. Although anything custom is always cool if done right. Most people seem to just end up mounting their air in the trunk area.
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Unread 08-31-2009, 12:07 AM   #3
PrinceBondar
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Quote:
Originally Posted by SaharaBlackNo1 View Post
Benchmark Designs makes an underhood dual battery kit:
Hm....interesting. I don't see how they made the space. I'd love to see a writeup on that install. Update:$220?!?!!? Yowza! Pretty sure I could do a decent under body install for a lot less.

Quote:
I don't know that anyone has thought to run anything extra under their JK, especially a tank that probably wouldn't take too well to being beat up, considering the contents are under pressure.
Yeah, it would have to be suitably armoured of course - that's a given.

Quote:
Most people seem to just end up mounting their air in the trunk area.
Definitely not interested in that, for various reasons.
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Unread 08-31-2009, 12:58 PM   #4
N2rock
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Definitely can't mount a Co2 tanks. Co2 Tanks can not be laid flat, they must be at 45-degree or more... Actually I'll re-word that before someone comes and corrects me They can be stored flat, but can not be used while laying flat.

So if you mounted a Co2 under there, you would have to lay it flat in order to fit, and then you would have to pull it out & stand it up anytime you want to use it. That would be very impractical.

Now as far as a 5 gallon air tank- completely useless unless you have an onboard compressor filling it. A 5 gal tank would maybe fill up one tire, so you would need a compressor to replenish it... And 135psi would be inadequate to run air tools (if that was the plan).
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Unread 08-31-2009, 02:46 PM   #5
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Somehow compressed gas canisters and the underside of a jeep make me nervous.
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Unread 08-31-2009, 02:50 PM   #6
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Quote:
Originally Posted by dstephns View Post
Somehow compressed gas canisters and the underside of a jeep make me nervous.
Well, sounds like that wouldn't work anyway - so that just leaves the battery.
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Unread 08-31-2009, 10:35 PM   #7
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What about an axillary gas tank?
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Unread 08-31-2009, 10:36 PM   #8
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Quote:
Originally Posted by Enforcicon View Post
What about an axillary gas tank?
I can't even afford to fill up the tank I've already got.
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Unread 08-31-2009, 10:41 PM   #9
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x2 on the cost of gas.
But I only get about 210 miles per tank (give or take) and I don't think I could say no to extending the range I can drive between fill ups.
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Unread 08-31-2009, 10:47 PM   #10
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Quote:
Originally Posted by Enforcicon View Post
x2 on the cost of gas.
But I only get about 210 miles per tank (give or take) and I don't think I could say no to extending the range I can drive between fill ups.
Yeah, I know. That was tongue in cheek (:

I'd love to have an aux gas tank. Probably wouldn't put it next to my aux battery though (:

I'd be more inclined to replace the stock gas tank with a bigger single tank. Going from memory - seems like there should be room to expand that sucker. I'd love to see someone do this mod so I could copy them (:
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Unread 09-03-2009, 04:18 PM   #11
Enforcicon
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Exactly how I feel. One larger tank seems like the way to go.
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Unread 09-03-2009, 06:10 PM   #12
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relocate the muffler and mount the air tank here... It is very out of the way. I have bent axles, knocked the rear bumper all over, bent my crossmember so bad I had to make a new one, broke rear shocks, etc. and this tank has been fine.

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Unread 09-03-2009, 06:13 PM   #13
waterboarder
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Nice mod!

That space on my jeep is reserved for storage area expansion though (:
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Unread 09-03-2009, 06:55 PM   #14
N2rock
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Quote:
Originally Posted by LHS-Cowboy View Post
relocate the muffler and mount the air tank here... It is very out of the way. I have bent axles, knocked the rear bumper all over, bent my crossmember so bad I had to make a new one, broke rear shocks, etc. and this tank has been fine.
yes, but you have a compressor feeding that tank, right?
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Unread 09-27-2013, 11:10 AM   #15
Josephus
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Long Ranger Fuel Tank

Quote:
Originally Posted by Enforcicon View Post
What about an axillary gas tank?
http://thelongranger.com.au/jklongra...k.html#TA64PHD

This is the Long Ranger secondary fuel tank with heavy duty skid plating.
It is designed to tuck up inside the framerail just like the factory OEM fuel tank. Although not quite double the capacity, it does significantly improve your range.
It utilizes a transfer pump, so we get to use the same filler cap.

http://thelongranger.com.au/jklongra...k.html#TA64PHD

Problem is $1600 before shipping and installation.

As my Rubi is already built to within 50 lbs of the GVWR, I couldn't install it yet alone fill it with fuel (legally) :'(

Using that same location you could mount a few air tanks and make a 1/4" steel skid plate to protect it.
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