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Unread 08-25-2004, 08:21 PM   #1
Orange Juice
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Bumper = Portable Air Tank

This idea was given to me the other day by a friend. I haven't tried it, but don't see any reason that it will not work.

Son has 4" x 4" x 1/4" square tubing welded to front bumper. Friend said why not weld the ends up solid, add an air chuck, and then hook it up to a compressor before going wheeling. If it is pressurized up to about 120 psi, it should fill at least 1 tire on the trails. All you would need is an air hose to couple to it to transfer air to the tire.

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Unread 08-25-2004, 09:40 PM   #2
balloo93
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Here's one done on a XJ:

http://www.pirate4x4.com/tech/billav...rearbumper.htm
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Unread 09-20-2004, 02:01 PM   #3
vballman
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i had a friend that did that. works well.
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Unread 09-20-2004, 02:35 PM   #4
igofshn
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You would be lucky to fill even 1 tire. There isn't enough volume. I have a 2.5 gal tank with compressor and if the compressor is off the air in the tank is not enough to fill a tire.
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Unread 09-20-2004, 03:10 PM   #5
wyldejackyl
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That would make for a hell of a rear-end collision! Imagine the look on the person's face after they rupture your pressurized bumper!
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Unread 09-20-2004, 11:33 PM   #6
Qman
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i seriously doubt any collision with a car or truck would cause that thing to Rupture 1/4" steel is thinker than any stock Bumper i have seen on the road. i doubt there would be much if any damage to the Bumper.... probably worst damage would be done to the Frame......


anyone have a link to Roll cage air tank, thought about that a couple times.. thought i saw something about it somewhere once..i would think there would be 2-3 gallons in a stock roll bar and if you could link it to the Front Down tubes would give you anther 1-2 gallons maybe....

bumpers are a good idea if you have big enough ones but mine are small and the rear would be more difficult to seal with the D-rings and tire carrier and i would probably only get a gallon out of them....... suppose you could get crafty and hook the bumpers to the Cage via hose and fittings combined you could fill up a tire or 2 or hook it to a air compressor and have a ton of reserve any of you engineer types care to calculate how many gallons you could get out of a cage a bumper Combo my bet is 3-5 gallons of course bumper size would make a huge differance...

Last edited by Qman; 09-23-2004 at 09:51 AM..
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Unread 09-21-2004, 01:47 PM   #7
JSBlu974X4
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seems like too much work for me. id rather just keep my stock bumper and buy a powertank or outback air co2 tank.
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Unread 09-21-2004, 10:06 PM   #8
DiegoYJ
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Quote:
Originally Posted by igofshn
You would be lucky to fill even 1 tire. There isn't enough volume. I have a 2.5 gal tank with compressor and if the compressor is off the air in the tank is not enough to fill a tire.
Then why even have a tank?
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Unread 09-21-2004, 10:38 PM   #9
igofshn
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Quote:
Originally Posted by DiegoYJ
Then why even have a tank?
It provides a good blast for setting beads and you can also run air tools. The compressor fills the tank as it is being used.
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Unread 09-21-2004, 11:44 PM   #10
DiegoYJ
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Quote:
Originally Posted by igofshn
It provides a good blast for setting beads and you can also run air tools. The compressor fills the tank as it is being used.
OH IC!

I'm a CO2 guy so I wasn't too sure how well the OB compressors worked in conjunction w/ the tank.
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Unread 09-22-2004, 12:57 PM   #11
DestructoJr
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Maybe not enough to fill a tire but at least a good flotation device in case of water landing????
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Unread 09-23-2004, 09:01 PM   #12
Hoxviii
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Think about it like this. Say one tire holds 5 gallons of air at 30 PSI. If you have a 5 gallon tank at 30 PSI you can fill one tire. At 60 PSI, two tires. At 90PSI, three tires. See where I'm going? You don't necessarily need volume as much as you need pressure.

My front bumper is 4" 5/16 continuous weld. It's rated to 1200 PSI working pressure, i can fill it to the limits of any shop/home compressor out there without worrying at all. That's 200 PSI ish and it holds about 4 gallons. I can fill two 35/12.50's off the tank no problem, but i have OBA so i can fill as many as i want .

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Unread 09-24-2004, 05:16 AM   #13
BIGJMCCONNELL
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Quote:
Originally Posted by Hoxviii
Think about it like this. Say one tire holds 5 gallons of air at 30 PSI. If you have a 5 gallon tank at 30 PSI you can fill one tire. At 60 PSI, two tires. At 90PSI, three tires. See where I'm going? You don't necessarily need volume as much as you need pressure.

Not exactly. The pressure would equalize between the the tire and the tank. You would have 15 in the tire, 15 in the tank (if you had a tire with zero pressure) I will agree that you can make up for some volume with pressure as long as you can trust the tank.

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Unread 09-24-2004, 10:08 AM   #14
denverd0n
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The problem is that filling a single 235/75x15 tire from dead empty to 30 psi takes almost 60 gallons of air at ambient pressure. That means that if your tank is at, say 120 psi, then you still need a 7.5 gallon tank to fill just one tire.

Of course, it doesn't take as much air to fill the tire from, say, 15 psi that you might air down to back up to 30 psi for driving home. Still, if you expect to air down and then fill back up 4 tires you will need a VERY large air tank to be able to do it without a compressor to make up the difference.
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Unread 09-24-2004, 02:02 PM   #15
Hoxviii
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i realize the equalization between the tank and the tire, i was just simplifying the concept.

Justin
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