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Unread 04-12-2013, 09:15 AM   #1
HighLonesome
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Portable air tank ?

I carry a little Viair compressor right now and I'm thinking of a portable tank to speed airing back up. What size tank do I need to air up 4 32" tires quickly? I can fill the tank to 125 psi and I usually air down to 12-15 psi. thanks

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Unread 04-12-2013, 09:25 AM   #2
kensnelling
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For 4 tires you'll need a BIG tank. My 7 gallon tank puts about 10 psi in 1 LT265/75R16, then it's time for a refill.

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Unread 04-12-2013, 09:34 AM   #3
HighLonesome
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jeez not what I wanted to hear
maybe its a bad idea
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Unread 04-12-2013, 11:44 AM   #4
Uniblurb
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Yeah, my 7 gal air tank filled to 125psi will only raise the air pressure by 10psi in about 3 1/2 stock tires (M&S 235/75/R15), 4 if I'm lucky, before it's empty. So probably wouldn't be feasible for your big tires unless you had a bigger tank.
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Unread 04-12-2013, 01:10 PM   #5
Technohead
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You need something like a scuba tank.
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Unread 04-12-2013, 02:01 PM   #6
HighLonesome
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Quote:
Originally Posted by Technohead View Post
You need something like a scuba tank.
I don't want anything I have to pay to get filled.
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Unread 04-12-2013, 04:11 PM   #7
joshsmithers
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If you have a shop compressor and an HPA booster, the only thing you'll have to pay is the electricity bill. An air booster can to fill any size tank up to 4500 psi or more depending on the booster. I'm not sure how much air boosters go for, though.
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Unread 04-12-2013, 04:22 PM   #8
joshsmithers
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Here's a compressor that fills up to 4500 psi and requires only 85 psi input air! Starts at $650. http://www.shoeboxcompressor.com/
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Unread 04-12-2013, 05:01 PM   #9
HighLonesome
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Quote:
Originally Posted by joshsmithers View Post
Here's a compressor that fills up to 4500 psi and requires only 85 psi input air! Starts at $650. http://www.shoeboxcompressor.com/
That is cool. That, a scuba tank, and some fittings and hoses should work.

In all reality, I'm thinking of only airing down to 18-20 lbs and going with a 10-11 lb tank. The tank is well under $100.
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Unread 04-12-2013, 05:53 PM   #10
ratmonkey
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co2, maybe a 20lb tank would get you done for a few trips.
125psi air? at least a 20gal
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Unread 04-12-2013, 05:59 PM   #11
WhiteOut
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If you only plan on going to 20psi, I wouldn't bother airing down at all.
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Unread 04-12-2013, 06:02 PM   #12
ratmonkey
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If you only plan on going to 20psi, I wouldn't bother airing down at all.
there is that though. 20psi isn't enough of a drop to matter.
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Unread 04-12-2013, 06:31 PM   #13
HighLonesome
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Quote:
Originally Posted by ratmonkey View Post
there is that though. 20psi isn't enough of a drop to matter.
Been going to 18 lately. I just cruise forest roads with my wife and it really smoothes it out for us old folks.
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