Nitrogen In Your Tires
Burning Brakes
Joined: Jul 2006
Posts: 1,080
Likes: 2
From: Pittsburgh PA
I didnt read this I learned this at the track. Then within 2 minutes of research, all signs point exactly to what I was saying.
"Nitrogen Instead of Air
Most of the teams remove the air from the tires and replace it with nitrogen. Compressed nitrogen contains less moisture than compressed air. When the tire heats up, moisture in the tire vaporizes and expands, causing the pressure inside the tire to increase. Even small changes in tire pressure can noticeably affect the handling of the car. By using nitrogen instead of air, the teams have more control over how much the pressure will increase when the tires heat up. "
http://entertainment.howstuffworks.com/nascar5.htm
Say what you want, the big dogs run it. Enough said!
"Nitrogen Instead of Air
Most of the teams remove the air from the tires and replace it with nitrogen. Compressed nitrogen contains less moisture than compressed air. When the tire heats up, moisture in the tire vaporizes and expands, causing the pressure inside the tire to increase. Even small changes in tire pressure can noticeably affect the handling of the car. By using nitrogen instead of air, the teams have more control over how much the pressure will increase when the tires heat up. "
http://entertainment.howstuffworks.com/nascar5.htm
Say what you want, the big dogs run it. Enough said!
Racer
Joined: May 2005
Posts: 497
Likes: 1
From: Casa Grande Az
The idea of using nitrogen in tires is because nitrogen does not expand or contract near as much as regular air as it heats up and cools down.
IE as the weather gets cold out , or hot as hell out the tire pressure will remain the same either way, like wise traveling from low altitude areas into and over the mountains will have no effect on it either.
It will probably not help out the typical car that drives 5-10k miles a year, however on fleet cars / trucks and espically big rigs , its a big deal.
Our entire over the road fleet of trucks (semi's) uses nitrogen filled tires. We however have a very large compressor on site that produces 99.9% pure nitrogen. We use it in our manufacturing process, filling truck tires up with it was a fringe benefit.
Just my .02
IE as the weather gets cold out , or hot as hell out the tire pressure will remain the same either way, like wise traveling from low altitude areas into and over the mountains will have no effect on it either.
It will probably not help out the typical car that drives 5-10k miles a year, however on fleet cars / trucks and espically big rigs , its a big deal.
Our entire over the road fleet of trucks (semi's) uses nitrogen filled tires. We however have a very large compressor on site that produces 99.9% pure nitrogen. We use it in our manufacturing process, filling truck tires up with it was a fringe benefit.
Just my .02
Team Owner
Joined: Mar 2001
Posts: 54,124
Likes: 30
From: Cincinnati, Oh USA
Wannabe, look up, "Universal gas constant". Nitrogen and atmospheric air expand and contract according to absolute temperature. Atmospheric air has some water vapor and it is the water vapor that causes a disproportionate increase in pressure when the tire air reaches 212 F. If dry atmospheric air is used to fill tires, then the pressure relationship with tire temperature is the same as nitrogen.
Orr89rocz: Peculiar to rubber, carbon dioxide diffuses through rubber faster than any other gas. The diffusion rate is not related to molecule size.
Orr89rocz: Peculiar to rubber, carbon dioxide diffuses through rubber faster than any other gas. The diffusion rate is not related to molecule size.
Pro
Joined: Mar 2008
Posts: 702
Likes: 0
water volume increases abt 1600x when state changes to steam...given pressure above atmospheric inside your tire, that would be abt 250*F..."not" likely in street use, "not unusual" in circle track (asphalt) applic...nit bottle is much faster/ more convenient at the track than a compressor, been doin it for years now, it's cheap $ (check your local welding gas supply)
Thank you for stepping into this pissing match with some real experience
Racer
Joined: May 2005
Posts: 497
Likes: 1
From: Casa Grande Az
Wannabe, look up, "Universal gas constant". Nitrogen and atmospheric air expand and contract according to absolute temperature. Atmospheric air has some water vapor and it is the water vapor that causes a disproportionate increase in pressure when the tire air reaches 212 F. If dry atmospheric air is used to fill tires, then the pressure relationship with tire temperature is the same as nitrogen.
Orr89rocz: Peculiar to rubber, carbon dioxide diffuses through rubber faster than any other gas. The diffusion rate is not related to molecule size.
Orr89rocz: Peculiar to rubber, carbon dioxide diffuses through rubber faster than any other gas. The diffusion rate is not related to molecule size.
Pro
Joined: Mar 2008
Posts: 702
Likes: 0
well for top dollar race teams or anyone who really does compete in auto road racing or long term high speed racing, then i can see the advantage of N2 in tires. Those racing styles will definately heat the tires and require attention to that kind of detail. I dont know how much a few psi of difference will effect handling of those cars, but for most street guys or occasional road racer/autox guy, n2 just isnt really beneficial
Melting Slicks
Joined: May 2007
Posts: 2,171
Likes: 1
From: Warwick RI
Thread Starter
Intermediate
Joined: Oct 2005
Posts: 48
Likes: 0
From: Louisville Ky.
Your right, but you want the best for your baby and if there is something new then this is one of the best places to get the truth.
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