Here's a good one! I have total access to nitrogen (N2 not LN2) and if would fill my tires on my truck with it would they stay cooler while towing aposed to using compressed air that has all sorts of crap in it. In other word would a inert gas create less heat by moving around inside a tire?
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2005 F-350, 6.0 PSD, Lariat,4x4,CC,LB,Torqshift,7" ProComp StageII Lift,MX-6 Reservoir 6 Way Adjustable Shocks, 37" BFG M/T, 18" Mazzi Hulk Wheels, Duel Steering Stabilizers, 6 Piece Billet Grille, Isspro 3 Guage A-Pillar, AFE SS 4" Turbo Back Exhaust, 4:56's, Firestone Air Bags, SCT by ID
The whole idea of using N2 is it eliminates any impurities in the gas filling the tire. ie: water which expands and contracts based on temp. If you use N2 then you should have less fluctuation of the tire pressure from the water in the air heating up and expanding the tire.
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Greg
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96 F250XLT,SC, PSD Hooked to a BTS Tranny, LWB 4x4 (4.10s), D60 Straight axle conversion, Isspro Triple A-pillar Guage Pack, Mag-HyTec Axle Cover and a few others. My Truck Pics Of Truck Stuff
<font color="green">This is the biggest joke to come along in the tire business in years.
The advantages for highway driving/towing are so insignificant that it is hardly worth the trouble.
There are many old air tanks in shops that are painted green and labeled N2, that have nothing in the world but plain old air, and are being passed off as nitrogen.
Who has the ability to tell the difference?? </font>
This is one of the many, many areas where missinformation outweighs facts about 100:1.
First of all, air IS (80%) nitrogen, so there is no appreciable difference in how fast it will leak out.
Secondly, it is not the difference in being able to generate heat, it is the mere fact that bottled compressed gas is usually very dry (as mentioned above). The lower water vapour content (humidity) means less pressure change with the inevitable temperature rise in a working tire. Racers use it because the difference between the "right" pressure and the one that puts you in second place may only be 1 or 2 psi (or at least is may be rumoured to be). It may be more good feeling than good sense, but racing is also full of questionable practices. Having all the "gear" in the paddock seems to be a large part of the experience. There is also the "psych out the cometition" factor to consider.
Finally, the only real advantage I can imagine for an over-the-road vehicle with nitrogen (which is NOT inert) is that if the tire is filled with that instead of air, there is no oxygen available to deteriorate the tire by oxidative breakdown of the rubber. However, I have never seen that kind of failure INSIDE, since usually the UV promotes very rapid oxidation where the sun hits the tire. Ozone (03 - also only on the outside) is much worse than 02 + UV and it the thing to worry about.
Nitrogen leaks through the tires slower than oxygen and,
since the nitrogen has no moisture content, pressures are more stable during temperature fluctuations.
The benefits are better for people that do not maintain their tire pressures, i.e. nearly everybody. I can't tell you how many tires I've changed tires that were ruined simply because they were run low on air.
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1985 International rollback, 6.9L 5 speed "Li'l Big Truck"
As I said, ALL bottled gasses have very low moisture content (none have "no" moisture. They usually have a dew point around -60C. Yes, the oxygen in air might leak faster than the nitrogen, but there is only 20% oxygen in air, so it isn't that big a deal.
As for helium, it is CONSIDERABLY smaller molecule than O2 or N2 adn will leak much more easily. However, if you put sufficiently large tires on, and fill them with Helium, the truck will float longer.
The definition of inert would be not only able to combine with oxygen, but any other element to form a compound. One of the key giveaways is to note that the common isotope of oxygen or nitrogen are di-atomic gasses.
Here is some food for thought. If about 20% of air is O2 and 80% is N2 and the O2 leaks faster, if you kept adding air to your tires, you would be increasing the concentration of N2 while the O2 keeps leaking out. Eventualy, you would almost have only N2 in your tires anyways.
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1993 Ford F-350, crew cab, 4X4, 300000mi, Banks old style turbo, 4.55 gears, 35 in tires; crudy E4od w/ transmission lock up mod, radioactive dirt.
You have just discovered the lowest cost, low-purity N2 separator around. Now, all you need to do is get a few thousand guys coming by your place ever month or so and topping up their tires, then "change their air" when the tires wear out. Of course, you could be rich with all the replacement tire business, never mind the N2 (if you could only find a market.....wait for it.....SELL IT TO TIRE SHOPS!).
The only reason for nitrogen is that is moisture free, and will slow the corrosion between the beam and rim, something that has plagued aluminum rims, over the years.
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'93 F-250 IDI, 4x4, K&N, no soup bowl, stock, with 265,XXX miles 5 speed, 3.55, kind of new LUK clutch, runs great, starts great, it is great. The truck is getting old.
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The only reason for nitrogen is that is moisture free, and will slow the corrosion between the beam and rim, something that has plagued aluminum rims, over the years.
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<font color="green">I agree with the corrosion issues with aluminum rims; but, the nitrogen will be no more moisture free than the equipment used to process and administer it.
Plain old air can be dried to zero moisture content. </font>
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