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12-06-2010, 06:56 PM | #1 |
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Nitrogen Fill
So guys,
A buddy of mine did me this huge favor of putting on my Blizzak WS60s on my Winter wheels, and decided to nitro fill the Blizzaks as well as my Current PS2s/ZCP wheels. My gosh, it's a definite noticeable difference! I feel that the car is a bit more stuck to the ground and the car has less bounce! even driving with EDC on Sport in NYC! Just wondering if any other fanatics have nitro-fill!
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12-06-2010, 07:31 PM | #3 | |
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Yeaaaaaaaah. Considering that air is ~78% nitrogen anyway. My immediate suspicion is that any difference you detect is due to a difference in tire pressure before and after the nitrogen fill. |
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12-06-2010, 07:33 PM | #4 |
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12-07-2010, 08:31 AM | #5 |
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Okay, I had it in my summer tires on my 2008 550i. I took them off around Thanksgiving and put them back on the car in late March. Three of them were down close to 3 PSI when one of the touted benefits of nitrogen is that the tires don't lose air. I think it's total BS.
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12-07-2010, 11:38 AM | #6 |
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Nitrogen tire pressures must be different. I assume rule of thumb extra 3 PSI... but I do not know. BMW assumes you put air, and prints pressures for air, not Nitrogen.
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12-07-2010, 11:48 AM | #7 |
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the machine they have was a swap, you fill your tires up to the PSI you want with Air, then you plug in the nitro machine and it does a air swap, its awesome, process takes abt 15 mins total for all 4 tires.
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12-07-2010, 04:21 PM | #8 |
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the whole point is that given the fact that there is no water in a tire completely filled with nitrogen (as opposed to regular air) the tire will be much less prone to wide pressure variations with different temperatures (read pressure will not go up as much on the track)
as for if it works well or not...well...in theory........... |
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12-07-2010, 05:21 PM | #10 | |
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P=pressure V=volume n=moles of gas T=temperature R = gas constant = 0.0821 L atm K-1 mol-1. Furthermore, tire temps will not get hot enough to cause any moisture in the tire to effect the pressure (it would need to approach boiling point) and that the amount of moisture in the air in the tire is insignificant. If there is still some concern it would be money better spent to buy a dryer for your compressor rather than fill up with nitrogen. |
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12-07-2010, 07:43 PM | #11 |
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•Tires stay inflated. Nitrogen molecules are three times bigger than oxygen, so gas escapes more slowly from the tire. This keeps the tire inflated longer at the correct level.
•Fuel economy improved. Nitrogen expands less than oxygen, so tire pressure doesn't go up and down as tires heat and cool. Underinflated tires reduce gas mileage. •Tires and wheels last longer. Underinflated tires get hot and wear more quickly. And since there's less moisture inside the tire, rubber rots and steel rims rust more slowly. •Vehicles handle better. Nitrogen is more common in 18-wheelers than passenger cars. NASCAR and Formula One drivers use nitro for better steering and performance. Aircraft tires are inflated with nitrogen or helium to minimize expansion and contraction from changes in temperature and atmospheric pressure during flight. Nitrogen is filled even on the ALMS M3 Cars. To those about that say it's BS. I felt the difference in terms of handling. the car has less bounce.
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12-07-2010, 08:09 PM | #12 |
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12-07-2010, 08:31 PM | #13 | |
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* MW of N2 is 28, MW of O2 is 32 - doubtful that N2 molecule is bigger * PV = nRT defines expansion of N2 AND AIR/O2 - basically they expand in exact same proportion with change in temperature * Aircraft use N2 because they want bone dry gas, since water in air would freeze during flight. Also, I seem to remember there is some concern with tire rupture with air being a fire concern, but I could be dreaming that one. discuss... |
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12-07-2010, 08:43 PM | #14 | |
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1) Nitrogen DOES NOT expand less than oxygen. See Ideal Gas Law...again. 2) I have NEVER seen a tire rot or wheel rust from the minute amount of moisture in air inside a tire. I have to call "Shenanigans" on this one. 3) Aircraft tires are filled with nitrogen because nitrogen is not an oxidizer (like oxygen) and will not support combustion. It is good to avoid the chance of combustion in the event of a tire blowout upon landing. 4) Better steering and performance? You are filling the tires with a gas to keep them inflated. If you can provide some specific science to show the type of gas used to inflate the tires makes a difference I will listen, otherwise I need to call "Shenanigans" again. 5) Car has less bounce? Are you trying to say that nitrogen reacts differently than air, which is 78% nitrogen, to compression and expansion? I hate to repeat myself, but I'm going back to the ideal gas law thing again. Last edited by Dave2; 12-07-2010 at 08:52 PM.. |
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12-07-2010, 08:48 PM | #15 | ||||
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Who's using nitrogen with steel rims?? But either way, that's BS too. Nitrogen is not a magically dry gas. During manufacturing (isolation), there's plenty of moisture in the gas. It's run through a dryer, just like the air in my compressor. Nitrogen is dry because it's run through a dryer. They're cheap, get one. Quote:
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12-07-2010, 09:01 PM | #16 |
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12-07-2010, 10:09 PM | #17 | |
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12-08-2010, 06:39 AM | #18 |
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lol I wouldn't have paid for it, I got it done for free. in all of my tires.
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12-08-2010, 09:11 AM | #19 | |
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Nitrogen fill & cold temps
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Greg Lake Oswego, Oregon, USA 2023 M2 Coupe - Brooklyn Grey/Cognac/CF, 6MT; 2020 MB GLE 450 |
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12-08-2010, 10:30 AM | #20 |
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Greg has it right. Benefits of nitrogen do exist, but for passenger car applications are negligible as compared to *well maintained* tires with reasonably dry air.
If it gets cold out, and pressure drops with temperature, just add some air. That'll fix that pesky TPMS light. If you're getting it free, there's no reason not to use nitrogen.. Keep on rockin. If a shop is trying to sell it to you for $10 per tire, it's not worth it.
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12-08-2010, 11:09 AM | #21 | |
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12-08-2010, 11:12 AM | #22 |
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I was thinking the exact same thing +1 Next he'll be dyno testing with & w/o Nitrogen
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