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Old 01-31-2005, 11:54 AM   #1 (permalink)
 
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CO2 and Air shocks

What would happen if you put co2 into an air shock say in an emergency situation? I know co2 goes to liquid at a certain pressure. How would this affect the shock characteristics? I want to know because I would like to start carrying an extra shock just in case but I would rather not carry both co2 and nitrogen. Anybody have any ideas on this? And I have searched.
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Old 01-31-2005, 01:34 PM   #2 (permalink)
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carry the extra shock with the same pressure in it as the highest pressure ones on the rig and bolt it on . if you need less pressure to set height let some out and re charge/check it at home Why would you carry an extra cylinder ? or if space is the concern swap your co2 setup for nitro and just carry nitrogen doesnt last quite as long as co2 bottle per bottle but you wouldnt ruin a $225 shock
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Old 02-01-2005, 10:17 AM   #3 (permalink)
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Quote:
Originally Posted by TJ40
What would happen if you put co2 into an air shock say in an emergency situation? I know co2 goes to liquid at a certain pressure. How would this affect the shock characteristics? I want to know because I would like to start carrying an extra shock just in case but I would rather not carry both co2 and nitrogen. Anybody have any ideas on this? And I have searched.
=================


for an emergency, co2 will work. i wouldn't leave it in for long though. you'll have to change the oil before you recharge with nitrogen due to contaminents. just like kycrawler said, carry a spare shock already charged.

besides what instance would you loose your nirtogen from a shock and simply be able to recharge it? chances are, if you lost your gas, you aren't gonna get more to stay in it. (blown seal, damaged shaft)
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Old 02-01-2005, 11:21 AM   #4 (permalink)
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.............but I would rather not carry both co2 and nitrogen. .

Stop carrying CO2 altogether and just carry nitrogen..........
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Old 02-01-2005, 11:32 AM   #5 (permalink)
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Like Rustynuts said. If you loose pressure you arn't going to get more to stay in. I may be stupid but I see no reason that putting Co2 in in the first place and not N2 at all would be fine for what we use the shocks for. Even Clean Dry air would work to me because it is a matter of water getting in that is the problem so that is part of the reason we use N2.
The answer is yes I feel that it would work fine.
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Old 02-01-2005, 11:38 AM   #6 (permalink)
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mountain bikes use regular old air and dont have a problem, other than loosing some pressure in a couple month period
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Old 02-01-2005, 05:36 PM   #7 (permalink)
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the problem with CO2 in an air shock is the pressure could be high enough that you would get some liquid co2 in there when it is compressed especially on a cold day. I think it would be fine to get you off the trail.

Also you could just drive off the trail on the dead shock. I recently drove off of sledgehammer with a broken main leaf
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Old 02-01-2005, 05:57 PM   #8 (permalink)
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I think just haveing a strut in the length that gives you the ride height you like rather than driveing of the trail on a dead shock. A piece of tube with some weld on tabs on each end that have a 5/8 hole in them would be fine or some tube with some 5/8 heims on each end.
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Old 02-01-2005, 06:14 PM   #9 (permalink)
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http://www.teamlockdown.com/CO2.html


Temp matters allot to co2 pressure, but your not going to turn it into liquid in your shock.


http://www.docsmachine.com/tech/liquid.html
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Old 02-01-2005, 06:28 PM   #10 (permalink)
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Marc, What pressure do you think you see inside an airshock when it is compressed? I am sure some numbers are on the board. Pig posteed a bunch of stuff, and I am too lazy to look, but I bet you would get some liquid. Of course it won't hydrolock because the liquid CO2 take up less volume.
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Old 02-01-2005, 07:16 PM   #11 (permalink)
 
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Quote:
Originally Posted by 66CJdean
Like Rustynuts said. If you loose pressure you arn't going to get more to stay in. I may be stupid but I see no reason that putting Co2 in in the first place and not N2 at all would be fine for what we use the shocks for. Even Clean Dry air would work to me because it is a matter of water getting in that is the problem so that is part of the reason we use N2.
The answer is yes I feel that it would work fine.

Like I said in the original post I would be putting the co2 in a spare shock, not a leaking one. Somebody suggested carring a charged shock but the reason I would not want to carry a charged shock is that it would be much harder to install it compared to charging it after its bolted up. Somebody else suggested carring only nitrogen but then I wouldn't have near the capacity to air up tires. It does make sense to change the oil after you're off the trail. I am surprised to hear that it wouldn't go to liquid in the shock. I thought the internal pressure would be very high.
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Old 02-01-2005, 11:04 PM   #12 (permalink)
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[QUOTE=ItsaCJ6]http://www.teamlockdown.com/CO2.html


Temp matters allot to co2 pressure, but your not going to turn it into liquid in your shock.



===========

what makes you think so?

i get 2000 psi in my air shox regularly when wheeling with the oil/nitrogen combo i'm running (according to a spreadsheet). if you were to put co2 in it's place, you'd have liquid co2 according to the attachment. i wouldn't want it in my shox.
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Last edited by rustynuts; 02-01-2005 at 11:06 PM.
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Old 02-02-2005, 09:20 AM   #13 (permalink)
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[QUOTE=rustynuts]
Quote:
Originally Posted by ItsaCJ6
http://www.teamlockdown.com/CO2.html


Temp matters allot to co2 pressure, but your not going to turn it into liquid in your shock.



===========

what makes you think so?

i get 2000 psi in my air shox regularly when wheeling with the oil/nitrogen combo i'm running (according to a spreadsheet). if you were to put co2 in it's place, you'd have liquid co2 according to the attachment. i wouldn't want it in my shox.
I was ASS U MEing again that 400 psi was the static charge
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