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Old 04-30-2012, 02:24 PM   #11 (permalink)
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If you want to get the humidity out of compressed air, just fill the tank up and let it sit overnight. The humidity will condense as the compressed air cools off and you have dry air in the morning.
Learned this trick painting cars. Fill the compressor and disconnect any air hoses so the pressure doesn't leak down. Pressure will go down overnight and almost every molecule of water will condense at the bottom of the compressor. The air coming out of the tank will be dry until you run the compressor enough to replace all the air in the tank. On nasty humid days here (seen 99 degrees and 100% at midnight) this gets the moisture out that can ruin a paint job even with separators.


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Old 04-30-2012, 02:25 PM   #12 (permalink)
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If I had my choice I would fill my tires with neon because its a nobel gas. (Note Helium would leak out too easily due to its molecular size)
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Old 04-30-2012, 02:54 PM   #13 (permalink)
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Originally Posted by guudasitgets View Post
One poster said if he had 100% nitrogen he wouldn't see any change is pressure. That is false. You can't change physics. If something is heated weather it's air or Nitrogen, it will expand. Don't know how sensitive his guage is but pressure will go up.

Actually, that's not what I said. I said, while performing weekly tire pressure checks on our fleet of large trucks (nitrogen filled) and small trucks (air compressor filled) I don't perceive a difference in their readings. I didn't say anything about temperature variations. Warm tires have increased pressure. Inreases in pressure are not a real issue for someone looking for economy. However, decreases are another thing all together. My point is, if you check your pressure regularly. Save your money and just use air...dry air.

Last edited by Iexpedite; 04-30-2012 at 03:02 PM..
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Old 05-01-2012, 01:48 AM   #14 (permalink)
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Ran it on a few sets for a year or two, since the first fill was free. Didn't see any benefit in terms of pressure retention that couldn't be achieved with "regular" air. For racers, it may have some benefits, but from a dollars and cents point of view, for the regular driver, having your own air compressor is a much better investment than paying to fill up on nitrogen.
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Old 05-01-2012, 02:07 AM   #15 (permalink)
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As a former tire tech, I will just say that if you don't SEE them fill it from a nitrogen tank, don't believe for a second they did. I worked at a shop for 3 months and was never taught how to do anything related to nitrogen beyond swapping to green valve stem caps. Pure 20 dollar cash grab.
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Old 05-01-2012, 12:37 PM   #16 (permalink)
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Originally Posted by JCH View Post
Any one use nitrogen in tires instead of air, any benefits to it?
Air is 78% nitrogen and it is free. The nitrogen is better in a street car scam was dreamed up as a way for tire stores to rip you off.
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Old 05-05-2012, 10:26 PM   #17 (permalink)
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Thanks for all the good info.

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