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Joined: Dec 2002
Posts: 13,093
Campfire Outfitter
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Campfire Outfitter
Joined: Dec 2002
Posts: 13,093 |
I have N2 tanks at home. Costs about the same to fill them up as CO2 or whatever. I used them when I service accumulators and landing gear struts. It is moisture free and less sensitive to heat. A lot of people use it in their airplane tires. It doesn't hurt a thing but it is amazing when you ask a salesman about "Nitro fill" they have some pretty outrageous claims.
I know some of the PCP air rifle competitors run Helium in their rifles because it expands quicker than compressed air or even N2. Have you priced Helium lately??
N2 doesn't have any downside except it is expensive compared to compressed air and inconvenient for most folks. It's easy for me as I always have a cylinder or two on hand.
NRA Benefactor Member
Those who live by the sword get shot by those who don't.
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Joined: Jan 2006
Posts: 69,325
Campfire Kahuna
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Campfire Kahuna
Joined: Jan 2006
Posts: 69,325 |
That's from Australia, though. South of the equator, the molecule size difference between N2 and air is reversed. 
“In a time of deceit telling the truth is a revolutionary act.”
― George Orwell
It's not over when you lose. It's over when you quit.
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Joined: Dec 2003
Posts: 86,180
Campfire Oracle
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Campfire Oracle
Joined: Dec 2003
Posts: 86,180 |
I use a special mixture that is 78% N2. I have a patent on it, but for a small fee I will PM the method - no paypal.
If you take the time it takes, it takes less time.
--Pat Parelli
American by birth; Alaskan by choice.
--ironbender
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Joined: Dec 2003
Posts: 86,180
Campfire Oracle
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Campfire Oracle
Joined: Dec 2003
Posts: 86,180 |
When I bought my last set of tires for my Ram 2500, I did so at Costco. They filled them with nitrogen which they do as a standard, no charge practice. The only practical advantage is that in really cold weather, you don't loose as much air pressure. Pretty important when carrying a truck camper and towing a Jeep in below zero weather. There is also the fact that nitrogen doesn't oxidize nearly as readily as oxygen. For whatever that might be worth.
I no longer hunt places with really cold temperatures so I don't concern myself with this. E Tires lose about 1 psi for every 10* temperature drop. I just pop a gauge on the tires about once per month. Right after changing my valve cover gaskets.
If you take the time it takes, it takes less time.
--Pat Parelli
American by birth; Alaskan by choice.
--ironbender
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Joined: Jun 2006
Posts: 46,024
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jun 2006
Posts: 46,024 |
A molecule of air? Seriously?
A wise man is frequently humbled.
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Joined: Aug 2011
Posts: 8,728
Campfire Outfitter
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Campfire Outfitter
Joined: Aug 2011
Posts: 8,728 |
I have used r-22 to inflate a flat.
But, it was taken, immediately to a tire shop for repair.
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Joined: Aug 2011
Posts: 8,728
Campfire Outfitter
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Campfire Outfitter
Joined: Aug 2011
Posts: 8,728 |
Nitrogen in tires, by a tire shop, is, imo , a scam
They charge for N2O
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Joined: Sep 2004
Posts: 4,711
Campfire Tracker
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Campfire Tracker
Joined: Sep 2004
Posts: 4,711 |
I think bicycle racers have used helium. Had one neighbor who got a new car with nitrogen, it still leaked and he had to drive way back to the dealer to get it filled. One trip costs more than the savings in mpg.
A run flat tire would be worth more to me.
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Joined: Nov 2010
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Campfire 'Bwana
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Campfire 'Bwana
Joined: Nov 2010
Posts: 37,093 |
They tried to sell me nitrogen when I bought my 2011 Z-71.
Crazy. I declined.
DF
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Joined: Nov 2002
Posts: 33,690
Campfire 'Bwana
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Campfire 'Bwana
Joined: Nov 2002
Posts: 33,690 |
My wife's Porsche came with nitrogen. When I replaced the tires the local shop filled them with nitrogen at no cost. They also add when needed at no cost.
Conduct is the best proof of character.
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Joined: Mar 2001
Posts: 12,153
Campfire Outfitter
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Campfire Outfitter
Joined: Mar 2001
Posts: 12,153 |
I used them when I service accumulators and landing gear struts. It is moisture free and less sensitive to heat. A lot of people use it in their airplane tires. I fly for a living and the tires in every jet I've ever flown have always been nitrogen filled. An airplane tire can go from 150+ degrees F to -50 in the course of a flight so the nitrogen keeps the pressure swings lower than regular air would. In a car tire it's just a scam to make money, there's no other reason for it.
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Joined: Feb 2004
Posts: 10,086
Campfire Outfitter
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Campfire Outfitter
Joined: Feb 2004
Posts: 10,086 |
I just pop a gauge on the tires about once per month.
Right after changing my valve cover gaskets. You drive 50K a month? HFS...
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Joined: Nov 2010
Posts: 37,093
Campfire 'Bwana
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Campfire 'Bwana
Joined: Nov 2010
Posts: 37,093 |
They tried to sell me nitrogen when I bought my 2011 Z-71.
Crazy. I declined.
DF
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Joined: Dec 2003
Posts: 86,180
Campfire Oracle
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Campfire Oracle
Joined: Dec 2003
Posts: 86,180 |
I just pop a gauge on the tires about once per month.
Right after changing my valve cover gaskets. You drive 50K a month? HFS...  
If you take the time it takes, it takes less time.
--Pat Parelli
American by birth; Alaskan by choice.
--ironbender
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Joined: Dec 2002
Posts: 25,858
Campfire Ranger
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Campfire Ranger
Joined: Dec 2002
Posts: 25,858 |
What N2 does is not vary by temperature as much due to being an inert gas. It doesn't do any other magic besides that really. I use N2 in my fast cars just because I have a bottle. I carry a nice ViAir compressor for the FJ 4x4 type stuff. What the off road guys use a lot is CO2 because it has more volume for the tank size.
Lots of reading to do on the FJ Cruiser Forum on airing up after rock crawling if you are really interested. The Jeep Forums and Pirate too have a lot of threads. Totally false. Avogadro's Hypothesis
Avogadro's hypothesis states that two samples of gas of equal volume, at the same temperature and pressure, contain the same number of molecules. Avogadro's hypothesis allows chemists to predict the behavior of ideal gasses. Amedeo Avogadro made the hypothesis in 1811 in an essay submitted to Journal de Physique. Elaborating on this hypothesis, he asserted the volume of a gas is not dependent on the size or mass of the molecules of the gas. Avogadro's hypothesis was applied in Avogadro's law to show that the volume of a gas (V) is equal to a constant (k) times the number of moles of gas (n), or V=kn. Or perhaps more simply, What is the Avogadro's law?
Avogadro's law (sometimes referred to as Avogadro's hypothesis or Avogadro's principle) is an experimental gas law relating volume of a gas to the amount of substance of gas present. ... Avogadro's law states that, "equal volumes of all gases, at the same temperature and pressure, have the same number of molecules". When I bought my last set of tires for my Ram 2500, I did so at Costco. They filled them with nitrogen which they do as a standard, no charge practice. The only practical advantage is that in really cold weather, you don't loose as much air pressure. Pretty important when carrying a truck camper and towing a Jeep in below zero weather. There is also the fact that nitrogen doesn't oxidize nearly as readily as oxygen. For whatever that might be worth.
I no longer hunt places with really cold temperatures so I don't concern myself with this. E Quite possible. Your tires might last a few weeks longer with no Oxygen inside. Nitrogen is dry compared to compressed air. Moist air expands and contracts more than dry air. Absolutely. A tire filled with pure water vapor would not stay inflated very long. Hopefully the tire store has an inline dryer on their air compressor.
People who choose to brew up their own storms bitch loudest about the rain.
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Joined: Apr 2010
Posts: 20,683
Campfire Ranger
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Campfire Ranger
Joined: Apr 2010
Posts: 20,683 |
I never noticed any "out of round" going on since nylon belted tires were gone. come spend a winter in Fairbanks take off in the a.m. at -40 clunk, clunk,clunk until that air gets warmed up or the pressure from rolling makes the tire round on all sides again.
I'm pretty certain when we sing our anthem and mention the land of the free, the original intent didn't mean cell phones, food stamps and birth control.
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Joined: Jan 2004
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Campfire Tracker
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Campfire Tracker
Joined: Jan 2004
Posts: 4,574 |
Higher end race cars (Indy Cars/F1) commonly use nitrogen as it doesn't heat up during a race. The heating causes a pressure increase that affects the desired contact patch and therefore the handling of the car. We tried it on lower end race cars (Formula Fords, Sports 2000) and couldn't tell much difference and it was a pain to have multiple purgings of our tires to make it really work.
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Joined: Dec 2002
Posts: 25,858
Campfire Ranger
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Campfire Ranger
Joined: Dec 2002
Posts: 25,858 |
Higher end race cars (Indy Cars/F1) commonly use nitrogen as it doesn't heat up during a race. The heating causes a pressure increase that affects the desired contact patch and therefore the handling of the car. We tried it on lower end race cars (Formula Fords, Sports 2000) and couldn't tell much difference and it was a pain to have multiple purgings of our tires to make it really work. Once again, a myth. You can fill the tire with Helium, Hydrogen, Argon, Nitrogen, Oxygen, Carbon Dioxide, Nitrous Oxide, Methane, Propane, or any other gas. Unlike solids and liquids, gases all expand identically with change in temperature. And whatever the gas is, it will assume the same temperature as the tire it is contained within. Sorry folks, this is basic High School Chemistry.
People who choose to brew up their own storms bitch loudest about the rain.
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Joined: Dec 2003
Posts: 86,180
Campfire Oracle
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Campfire Oracle
Joined: Dec 2003
Posts: 86,180 |
PV=nRT
N2 is "inert" because it does not react chemically.
If you take the time it takes, it takes less time.
--Pat Parelli
American by birth; Alaskan by choice.
--ironbender
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Joined: Sep 2008
Posts: 15,521
Campfire Ranger
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Campfire Ranger
Joined: Sep 2008
Posts: 15,521 |
Nitrogen has become old hat - helium is the new rage, especially for the expensive sports car folks. Reduces unsprung weight.
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