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Old 07-15-2014, 12:06 PM   #43
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Originally Posted by featherbedder View Post
As I stated before n2 in shocks, airplane struts. Racing tires for build up of heat and stability as we raced motorcycles up to 160 mph, n2 did not give us any failures. N2 is not needed for highway tires, and n2 put in then air put in n2 was contaminated then useless.
There is a logic to this, but it isn't because of the nitrogen, as has been noted above. It is because the bottled nitrogen is dry. Moisture is the problem for pressure stability with varying temperature, as water vapour expands much more than air/nitrogen. You can put a dryer on your compressor to remove the moisture, or you can use nitrogen which is already dry.
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Old 07-16-2014, 07:28 AM   #44
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I'm not completely buying the water in racing tires theory. I concede that liquid water would affect pressure buildup and you would get more with liquid water in the air chamber.

But I strongly suspect the reason nitrogen is used in racing tires has more to do with the fact that a nitrogen bottle is easier to transport than an air compressor.

In the 1970's I used to crew for an IMSA race team. They used nitrogen bottles to power the impact guns for tire changes. Those did not take up a lot of space, it was easy to transport into the hot pits and one bottle could last the whole weekend. We used that bottle to fill the tires. Easy-Peasy!
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Old 07-16-2014, 07:54 AM   #45
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The only performance difference between nitrogen and air is due to the level of dihydrogen monoxide contamination.
Some people have been known to dilute their whiskey with dihydrogen monoxide.
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Old 07-16-2014, 08:06 AM   #46
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nitrogen

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Originally Posted by CapriRacer View Post
I'm not completely buying the water in racing tires theory. I concede that liquid water would affect pressure buildup and you would get more with liquid water in the air chamber.

But I strongly suspect the reason nitrogen is used in racing tires has more to do with the fact that a nitrogen bottle is easier to transport than an air compressor.

In the 1970's I used to crew for an IMSA race team. They used nitrogen bottles to power the impact guns for tire changes. Those did not take up a lot of space, it was easy to transport into the hot pits and one bottle could last the whole weekend. We used that bottle to fill the tires. Easy-Peasy!
We did not start using n2 until the 80s & we found the tire pressure did not go up and very few failures of which we had none versus air filled. When you are racing on 2 wheels at 160mph w/out roll cage seat harness ore other safety devices that cars have, we don't take chances with tires etc. You will get or killed or hurt if falling at these speeds this is not IMSA with a open or closed cage around you & technology has changed since 70s enuf said on this matter as I stated before n2 is not needed for highway use &waste of money unless free. PS I owned the bikes we raced & did all work both on & off track. We raced grand national races all over US & had top pros ride for me & my 2 sons so I did not take chances with there lives
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Old 07-16-2014, 11:16 AM   #47
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Some people have been known to dilute their whiskey with dihydrogen monoxide.

Is that a tongue twisting way to say water?

I use the solid form to start the dilution process in my Kentucky cough medicine.

It's good to see tech discussion interspersed with a bit of levity.

Appreciate the professionals perspectives.
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Old 07-16-2014, 02:22 PM   #48
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I fill my tires with rainbows and the blood of unicorns. Works really well. True story folks.
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Old 07-16-2014, 02:59 PM   #49
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Some people have been known to dilute their whiskey with dihydrogen monoxide.
Never tried it. Prefer hydrohydroxic acid in my whiskey.
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Old 07-16-2014, 04:06 PM   #50
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I filled my AS tires with helium. I now get better mileage as the trailer weighs less. I had to put a spoiler over the rear of the AS to keep it on the ground at high speeds though.
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Old 07-16-2014, 04:22 PM   #51
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If you fill your tires with air and let the smaller oxygen molecules migrate out of the tire you will end up with a tire full of fatter nitrogen molecules.
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Old 07-16-2014, 05:11 PM   #52
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I might try that. Unicorns are getting harder to come by.
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Old 07-16-2014, 06:03 PM   #53
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If you fill your tires with air and let the smaller oxygen molecules migrate out of the tire you will end up with a tire full of fatter nitrogen molecules.
Like all great ideas, this seems so obvious once someone has that stroke of genius.

Much better than unicorn blood. I do use unicorn oil in the truck engine.

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Old 07-16-2014, 06:19 PM   #54
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Gene,

What type ? O AB A NEG other?

Yes Nurse , I did take my meds.

Gary
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Old 07-18-2014, 12:21 AM   #55
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Here in sunny California we are having big-time drought concerns. Does anyone know how I can drain the H2O from my tires so I can use it to water my lawn? Then I can go racing.

The other choice may be to use triple helium: HeHeHe...

Seriously, (not) this is a great thread, lots of creativity and fun.
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Old 07-18-2014, 10:26 AM   #56
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Some people have been known to dilute their whiskey with dihydrogen monoxide.
This is only acceptable in its liquid state... the solid form of the compound detracts from enjoyment of the full flavor of the spirit.
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