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use of co2
has enyone checked the differance of tire pressures after tire heats up when using co2
went to the local air gas store to price a tank and the gentleman there talked me out of using co2 due to it being an unstable gas that can increse tire pressure to dagerous levels when heated |
Great question. Air expands/contracts within a few pounds of pressure on a 30~35psi normal size car tire. I'd expect the same few pounds of pressure range on a 35" tire, although there is more 'capacity' in the tire, and normal driving is up around 40~50 psi. There might be a little more range because of the increased psi? :thinking:
So the question is...for the range of heat generated in typical driving and weather conditions...does CO2 expand/contract more or less than regular everyday air? :munching: |
co2 pressure will go up when its hot the guy you talked to is correct i wouldn't use co2, now nitrogen yes or just plain air works
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For what it's worth I air down to @ 15 psi and after the run I take it back to @ 37 with C02. The next day the pressure will drop @ 5 pounds. I have not had a problem with C02 expanding to a dangerous point that I know about. If you had nitrogen and were to air aown I can see the $$$ flowing away..
Best of luck. |
the only problem with nitrogen is you cant take a signifigant volume on the trail. you'd need a huge cylinder.
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on that note, do you replace the co2 with atmospheric air for daily driving or is it safe to air up and drive 1,000 miles on hiways
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Pressure x temp = new pressure x new temp. Do the math and figure out how much temp change you'd need to blow your tires up.
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Originally Posted by skeptic
(Post 598164)
Pressure x temp = new pressure x new temp. Do the math and figure out how much temp change you'd need to blow your tires up.
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thats what im gonna do. i dont care to run nitrogen; im more so weighing co2 vs air compressor. im sure ifit were that big of a difference, it would be well known
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Originally Posted by HITMONEY
(Post 598200)
Here is what will sell you...
Go wheeling with me.. after a day of fun and its air up time... I get my hose connect to Co2... you crank up your on board compressor. You get done filling up tire one. I am reeling up my hose to put it away because I am done all four and I am now watching you still bent down on your knees going for tire number 2. And hey...while your down there...... :brows: thanks for the tip. no pun intended |
Originally Posted by HITMONEY
(Post 598240)
I don't know what you are referring too, but I was gonna ask you to check and see if my rear main seal was leaking while you were down there. :dontknow2:
:rotflmao2: |
right on. im in the proccess of putting one together and want to make sure the money will be well spent... thanks for the info.
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Originally Posted by HITMONEY
(Post 598102)
***Good things about N2... N2 molecules are bigger meaning they won't leak or bleed through the rubber as easily as CO2 or O2 or plain ole air. N2 will not release any moisture into your tire from condensation (Co2 is a very dry gas but is very cold when released creating condensation moisture). N2 will not expand as much as Co2 or plain ole air at temperature meaning you keep a more constant pressure in your tire.
***Our sport requires us to actually take our compressed gas with us on the trail so a bottle of CO2 @ 800lbs per square inch is safer than a bottle of N2 @ 3000 lbs per square inch. ***Our sport requires us to take our compressed gas with us, so the amount we can take with us in the smallest containment vessel possible is important.. a 15lb bottle of Co2 yields far more gas than a 15lb bottle of N2. This way you can bring enough Co2 to run air tools as well as filling your tires. And you can pop a bead back on with Co2 and still have enough to fill all your tires. ***In our sport, moisture in our tires causes about as much concern to us as worrying about getting our rig dirty. Definitely on the money there. As for the stability thing, look at the type of pressure you're going to have in your tires. Maybe 35 PSI tops. The whole stability thing is a moot point at that type of pressure and what you're using your tires for. An F1 racecar running slicks at 200MPH with massive braking and burnouts, an issue maybe. Offroad tires at 85MPH, pffffft. I wish I had the link of the test a company did on this Nitrogen superiority myth. They tested a bunch of tires filled with standard atmosphere, CO2, and nitrogen in the Arizona desert. Only difference in the CO2 tire, like 10% more humidity, and many people don't know moisture CAN migrate through your tire. So fill a bottle with CO2 and unless it's like minus 35 don't worry about it. And x2 to your following post HITMONEY |
Forgot to add, x2 on the bead popping. Did it a few years ago on a friend's truck. CO2 made a tough job take about 30 seconds of HighLifting, 4 seconds of Popping, and 25 seconds of filling. No dice with a compressor.
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Originally Posted by HITMONEY
(Post 598102)
Yes, N2 is more stable than Co2 under pressure meaning it doesn't react to temperature differences as much as Co2 does. But for him tell you "can increase tire pressure to dangerous levels when heated" is a lil over the top.
Here is something not over the top.... N2 is stored as a gas at very high pressures.. Co2 is stored as a liquid at much lower pressures. Lower pressures equals lower risk of "BOOM" in say a rollover incident. CO2 also stores more volume because it is stored as a liquid which evaporates and expands into gas as pressure is relieved. N2 stored as a gas yielding less volume. Good things about N2... N2 molecules are bigger meaning they won't leak or bleed through the rubber as easily as CO2 or O2 or plain ole air. N2 will not release any moisture into your tire from condensation (Co2 is a very dry gas but is very cold when released creating condensation moisture). N2 will not expand as much as Co2 or plain ole air at temperature meaning you keep a more constant pressure in your tire. What it boils down to... in our sport.. Off-Roading, the positives of using Co2 outweigh both its own negatives and the positives of N2 for these reasons... Our sport doesn't really need constant tire pressures... high speed racing sports do. Our sport requires us to actually take our compressed gas with us on the trail so a bottle of CO2 @ 800lbs per square inch is safer than a bottle of N2 @ 3000 lbs per square inch. Our sport requires us to take our compressed gas with us, so the amount we can take with us in the smallest containment vessel possible is important.. a 15lb bottle of Co2 yields far more gas than a 15lb bottle of N2. This way you can bring enough Co2 to run air tools as well as filling your tires. And you can pop a bead back on with Co2 and still have enough to fill all your tires. In our sport, moisture in our tires causes about as much concern to us as worrying about getting our rig dirty. Both gasses work, Co2 just fits the needs of the off-roading sport better. PS.. don't worry.. if you even have the slightest clue about how to maintain your rig, your tires wont explode. :rotflmao1: Working in the compressed gas industry I can say your assesment is spot on. I could tell you stories of missuse from both N2 and Co2 that could scare the living crap out of you. As for the OP's original question, "Will co2 blow a tire".....the answer is yes and very easy. Co2 while it is considered a low pressure gas if when filling your tires you have the tank on its side or upside down and you are withdrawing liquid from the tank, your tire will blow very quickly. 4oz of liquid co2 will expell 2400 cuft of gas, with the volume of a 35" tire that will equate to about 30 psi (give or take due to varience in sizes).....so in short if you have the tank on its side while filling and you get 6-8 oz of liquid into the tire the pressure could swell to 100 psi or more. As long as the tank is upright you would be fine. As in anything, if used properly Co2 is great for offroaders, if used unsafe it could go bad quickly. |
Originally Posted by sn4cktime
(Post 602535)
So fill a bottle with CO2 and unless it's like minus 35 don't worry about it.
And x2 to your following post HITMONEY |
Originally Posted by BaltChief
(Post 602678)
Working in the compressed gas industry I can say your assesment is spot on. I could tell you stories of missuse from both N2 and Co2 that could scare the living crap out of you.
As for the OP's original question, "Will co2 blow a tire".....the answer is yes and very easy. Co2 while it is considered a low pressure gas if when filling your tires you have the tank on its side or upside down and you are withdrawing liquid from the tank, your tire will blow very quickly. 4oz of liquid co2 will expell 2400 cuft of gas, with the volume of a 35" tire that will equate to about 30 psi (give or take due to varience in sizes).....so in short if you have the tank on its side while filling and you get 6-8 oz of liquid into the tire the pressure could swell to 100 psi or more. As long as the tank is upright you would be fine. As in anything, if used properly Co2 is great for offroaders, if used unsafe it could go bad quickly. |
Originally Posted by flyer415
(Post 605611)
I am finalizing my decision between the Powertank and The Source. I live in canada and my temps do go to minus 35 (sometimes for weeks on end). Are you telling me to keep the tank at normal temps (therefore store in my basement and not my unheated garage) or are you telling me that my tire pressure will change dramatically over night when the jeep is sitting outdoors.
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I know of Power Tank, can anyone provide website info on "The Source"???:thinking:
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...never heard of this group yet they're far less expensive than Power Tank!!
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If you are looking for a simple set up check out Williams Balloons & Helium, they are in Santa Maria Ca. You can get 5 or 10 pound tanks as well as regulators and hose. I did get tanks there but the hose, regulator and chuck from Power Tank.
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Originally Posted by sandman
(Post 609340)
If you are looking for a simple set up check out Williams Balloons & Helium, they are in Santa Maria Ca. You can get 5 or 10 pound tanks as well as regulators and hose. I did get tanks there but the hose, regulator and chuck from Power Tank.
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