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what about towing though? Can you add air with Nitro? Or do you have to specifically add more Nitro to the tire? Nobody's asked this yet....figured I would chime in!
A local Ford dealership in my area charges $5 per tire to fill them with Nitrogen.
I never even considered it because I have to air my tires up and down depending on how much weight I'm hauling. I'll just check the air in the tires often.
Well, for what it's worth, this is a little extract of something I got from another site when the discussion of Nitrogen in tires came up:
"That statement is is comparable to stating that if one person pee's in the ocean the level of the ocean must rise.
Air is 78.5% Nitrogen, 21% Oxygen with with the balance being argon, water vapor, carbon dioxide methane and various other gasses. N2 and O2 are linear not circular molecules. As a quick comparison, we can use the covalent radius defined as 1/2 the distance between to identical covalently bonding nuclei. This is measured in picometers (1 pm= 1x 10-12 m). Nitrogen's covalent radius is 73pm so the length of a nitrogen molecule ought to be about 4 X 73pm or 292 pm. A molecule of oxygen ought to be just a shade larger 4 X 75pm or 300pm. So an oxygen molecule ought to be about 2.7% larger than a nitrogen molecule. All the other minute gasees are larger than Nitrogen. The average size of a molecule in Air is greater than the average size of a molecule of Nitrogen. The leakage rate for pure Nitrogen should not be less than air based on pure permeability.
The ONLY science to the thing is the water vapor content and its affect on pressure with temperature change. Even that is so minute, maybe 0.5 PSI for 50 F temp change, as not to matter to every day driving. In extreme racing applications it can matter. With airplanes it is a combustion support/fire issue.
Save your money for something that really matters, you still need to check the pressure just as often."
If nothing else, it should spark some even more interesting debates!!!
Well, for what it's worth, this is a little extract of something I got from another site when the discussion of Nitrogen in tires came up:
"That statement is is comparable to stating that if one person pee's in the ocean the level of the ocean must rise.
Air is 78.5% Nitrogen, 21% Oxygen with with the balance being argon, water vapor, carbon dioxide methane and various other gasses. N2 and O2 are linear not circular molecules. As a quick comparison, we can use the covalent radius defined as 1/2 the distance between to identical covalently bonding nuclei. This is measured in picometers (1 pm= 1x 10-12 m). Nitrogen's covalent radius is 73pm so the length of a nitrogen molecule ought to be about 4 X 73pm or 292 pm. A molecule of oxygen ought to be just a shade larger 4 X 75pm or 300pm. So an oxygen molecule ought to be about 2.7% larger than a nitrogen molecule. All the other minute gasees are larger than Nitrogen. The average size of a molecule in Air is greater than the average size of a molecule of Nitrogen. The leakage rate for pure Nitrogen should not be less than air based on pure permeability.
The ONLY science to the thing is the water vapor content and its affect on pressure with temperature change. Even that is so minute, maybe 0.5 PSI for 50 F temp change, as not to matter to every day driving. In extreme racing applications it can matter. With airplanes it is a combustion support/fire issue.
Save your money for something that really matters, you still need to check the pressure just as often."
If nothing else, it should spark some even more interesting debates!!!
That whole .5 PSI for 50F temp change is completely wrong.. I have a Hella TC-400 TPMS in my truck.. At Cold PSI my fronts and rears are 45PSI.. Lets say I leave to go to class, 32 miles straight highway for me.. When I get there, my fronts and rears are 51PSI.. The cold temp is roughly 80F and the highway temp is about 110-120F.. Now thats a massive increase and surely not .5 PSI.
In the summer time I have to check my tires very early in the morning. It don't take much of the sun shining on them to heat the tires up enough to get a high air pressure reading.
5psi varitiation between cold and hot tires is common.
In the summer time I have to check my tires very early in the morning. It don't take much of the sun shining on them to heat the tires up enough to get a high air pressure reading.
5psi varitiation between cold and hot tires is common.
Thats for sure... But whatever article he copied that said .5 PSI per 50F of change.. That's like WAAAAAAAAAy off....
Well if your tires heat up that much with air, chances are they'll heat up that much with pure nitro.
Like was said before, air is 78-79% nitrogen anyway. You'll still get a lot of the same PSI increase because it's mostly the same gas.
About the only thing that it has going for it is the slower leak down. However, it still does, and you still have to check pressures and add some every once in a while.
So bottom line as far as I'm concerned-
-If they fill it with nitro for free when they put new tires on, it isn't hurting anyone.
-I'm not going to go out of my way to fill with nitrogen and I'm certainly not wasting 60 dollars on the stuff.
However now that I think about it, I might start selling it as the profit margin should be huge and apparently people will buy it.
That whole .5 PSI for 50F temp change is completely wrong.. I have a Hella TC-400 TPMS in my truck.. At Cold PSI my fronts and rears are 45PSI.. Lets say I leave to go to class, 32 miles straight highway for me.. When I get there, my fronts and rears are 51PSI.. The cold temp is roughly 80F and the highway temp is about 110-120F.. Now thats a massive increase and surely not .5 PSI.
Your numbers are pretty close Storm. The average is about 1 psi per 10 degrees fahrenheit temperature change.
what about towing though? Can you add air with Nitro? Or do you have to specifically add more Nitro to the tire? Nobody's asked this yet....figured I would chime in!
If you air up and down alot, nitrogen is not for you. Unless you have a ready supply. You can add air to nitrogen, but you defeat the benefits of the nitrogen.
Well if your tires heat up that much with air, chances are they'll heat up that much with pure nitro.
Like was said before, air is 78-79% nitrogen anyway. You'll still get a lot of the same PSI increase because it's mostly the same gas.
About the only thing that it has going for it is the slower leak down. However, it still does, and you still have to check pressures and add some every once in a while.
So bottom line as far as I'm concerned-
-If they fill it with nitro for free when they put new tires on, it isn't hurting anyone.
-I'm not going to go out of my way to fill with nitrogen and I'm certainly not wasting 60 dollars on the stuff.
However now that I think about it, I might start selling it as the profit margin should be huge and apparently people will buy it.
Mike
I was under the impression that Nitrogen was a gas that doesn't get altered by temps.. Unlike air which will decrease or expand.. Damn its been a long time since I had a science class.. I feel like an Old Geezer now..
I don't have a problem spending $60 to try it.. Hell I just spent $50 the other day on 15 Paintball Passes that I'll probably never use..
I can see your point tho, if it was free, go for it.. Except I can't find anything here that does it except for MacHaik.
Originally Posted by PowerStrokeHD
Your numbers are pretty close Storm. The average is about 1 psi per 10 degrees fahrenheit temperature change.
Right..
Originally Posted by miller_feed
What will we call this new mod?
STORMTROGEN TIRE MOD????
Nah.. The Stormwillrunoveryourtruckbecauseyouthinkthatwasfun ny
But.....but.....you're supposed to measure your tire pressure cold, the increase in pressure when hot is already factored in, so if nitrogen doesn't expand as much then you'll have underinflated tires!
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