# tire pressure: does this exist?
**URL:** https://forums.speedlife.net/t/tire-pressure-does-this-exist/37259
**Category:** NYSpeed Automotive
**Created:** [October 19, 2007, 11:20am UTC](https://forums.speedlife.net/t/tire-pressure-does-this-exist/37259 "2007-10-19T11:20:00Z")
**Posts on this page:** 14
**Page:** 3
### Author:  [@speedracer329](https://forums.speedlife.net/u/speedracer329)
#### Post date: [October 23, 2007, 3:48pm UTC](https://forums.speedlife.net/t/tire-pressure-does-this-exist/37259/41 "2007-10-23T15:48:50Z")
id love to see that explosion.
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### Author:  [@rushman](https://forums.speedlife.net/u/rushman)
#### Post date: [October 23, 2007, 5:06pm UTC](https://forums.speedlife.net/t/tire-pressure-does-this-exist/37259/42 "2007-10-23T17:06:03Z")
hydrogen would leak right through the tire… its just protons 🙂
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### Author:  [@66impalass](https://forums.speedlife.net/u/66impalass)
#### Post date: [October 23, 2007, 5:37pm UTC](https://forums.speedlife.net/t/tire-pressure-does-this-exist/37259/43 "2007-10-23T17:37:44Z")
[quote=“rushman,post:42,topic:37259"”]
hydrogen would leak right through the tire… its just protons 🙂
[/quote]
:tup: for not being intelligent
here’s a representation an hydrogen atom
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### Author:  [@ultradriver10000](https://forums.speedlife.net/u/ultradriver10000)
#### Post date: [October 23, 2007, 7:21pm UTC](https://forums.speedlife.net/t/tire-pressure-does-this-exist/37259/44 "2007-10-23T19:21:59Z")
From what I know Mario Andretti(maybe i’ll find out for sure tomorrow) was the first person to ever implement this in the CART series races. He was also the first to pre-heat his tires before a race and before pit stops. I believe both of these were deemed illegal later on though. Oh and yes they work.
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### Author:  [@Fry](https://forums.speedlife.net/u/Fry)
#### Post date: [October 23, 2007, 7:25pm UTC](https://forums.speedlife.net/t/tire-pressure-does-this-exist/37259/45 "2007-10-23T19:25:48Z")
[quote=“cdvma,post:35,topic:37259"”]
Yea the local places that do fills usually charge an arm for what you get and its never pure enough nitrogen. There is always moisture in there
[/quote]
Unless the gas got contaminated, there shouldn’t be any moisture, as in dewpoints below -50\*F. Granted the quicky lube’s evacuating/purging/filling procedures might not be the greatest…
But not having any moisture is the whole benefit. Who cares if you have 78% nitrogen (air) or 99% nitrogen, right? It’s the water vapor that’s doing most of the expanding.
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### Author:  [@rushman](https://forums.speedlife.net/u/rushman)
#### Post date: [October 24, 2007, 4:07am UTC](https://forums.speedlife.net/t/tire-pressure-does-this-exist/37259/46 "2007-10-24T04:07:04Z")
Fook off… so I forget an electron 🙂
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### Author:  [@Fry](https://forums.speedlife.net/u/Fry)
#### Post date: [October 24, 2007, 9:00am UTC](https://forums.speedlife.net/t/tire-pressure-does-this-exist/37259/47 "2007-10-24T09:00:52Z")
You forgot the electron? You probably listen to Steely Dan too…
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### Author:  [@ultradriver10000](https://forums.speedlife.net/u/ultradriver10000)
#### Post date: [October 24, 2007, 1:58pm UTC](https://forums.speedlife.net/t/tire-pressure-does-this-exist/37259/48 "2007-10-24T13:58:02Z")
It was Mike Andretti that first used these. They don’t have a fast enough responce to allow air to escape during a bump or hard turn. It slowly seeeeeeps air, it doesn’t pop.
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### Author:  [@dmoffitt](https://forums.speedlife.net/u/dmoffitt)
#### Post date: [October 25, 2007, 6:57am UTC](https://forums.speedlife.net/t/tire-pressure-does-this-exist/37259/49 "2007-10-25T06:57:52Z")
Michelin says "We strongly discourage pressure bleeders. A bleeder is another item that can fail. With a proper pressure management program, you can obtain repeatable and correct hot pressures without the risk of additional components. "
from the Pilot Sport Cup brochure: [http://www.tirerack.com/tires/tiretech/general/Michelin\_Care\_and\_Feeding.pdf](http://www.tirerack.com/tires/tiretech/general/Michelin_Care_and_Feeding.pdf)
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### Author:  [@cdvma](https://forums.speedlife.net/u/cdvma)
#### Post date: [October 25, 2007, 10:10am UTC](https://forums.speedlife.net/t/tire-pressure-does-this-exist/37259/50 "2007-10-25T10:10:46Z")
[quote=“Fry,post:45,topic:37259"”]
Unless the gas got contaminated, there shouldn’t be any moisture, as in dewpoints below -50\*F. Granted the quicky lube’s evacuating/purging/filling procedures might not be the greatest…
But not having any moisture is the whole benefit. Who cares if you have 78% nitrogen (air) or 99% nitrogen, right? It’s the water vapor that’s doing most of the expanding.
[/quote]
Yea its not the gas that gets mixed, its the fill that is never “good enough”.
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### Author:  [@Roush97](https://forums.speedlife.net/u/Roush97)
#### Post date: [October 27, 2007, 1:06am UTC](https://forums.speedlife.net/t/tire-pressure-does-this-exist/37259/51 "2007-10-27T01:06:29Z")
I remember last year or the year before some teams where accused of drilling tiny holes in there tires to let air out during the race.
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### Author:  [@BigEd88](https://forums.speedlife.net/u/BigEd88)
#### Post date: [October 27, 2007, 7:56am UTC](https://forums.speedlife.net/t/tire-pressure-does-this-exist/37259/52 "2007-10-27T07:56:59Z")
Are you really changing the capacity of the tire in a turn? PSI measures pounds per square inch right? If the tires size isn’t changing would the PSI? Isn’t it just temperature which changes PSI?
Jacking a car up yeilds the same pressure in a tire as when it was contacting the ground.
Loading the back of a pickup yields the same tire pressure as when it was unloaded.
Just something to think about that I’ve noticed in real world situations.
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### Author:  [@cdvma](https://forums.speedlife.net/u/cdvma)
#### Post date: [October 27, 2007, 9:39am UTC](https://forums.speedlife.net/t/tire-pressure-does-this-exist/37259/53 "2007-10-27T09:39:56Z")
At a macro level the tire will heat up in the turn, changing the tire pressure but its so macro…
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### Author:  [@ultradriver10000](https://forums.speedlife.net/u/ultradriver10000)
#### Post date: [October 30, 2007, 11:42am UTC](https://forums.speedlife.net/t/tire-pressure-does-this-exist/37259/54 "2007-10-30T11:42:20Z")
A load will actually change your tire pressure. The tire will deform under load even though it is on a small level. (It also deforms when conforming to differences in road contours.) This deformed shape will have a different volume than a “normally” shaped tire. These levels of change are very small, but in the end make a difference in a race. The average tire pressure gauge isn’t even precise enough to show a measurable difference.
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