id love to see that explosion.
[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
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.
[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.
Fook off… so I forget an electron 
You forgot the electron? You probably listen to Steely Dan too…
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.
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
[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”.
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.
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.
At a macro level the tire will heat up in the turn, changing the tire pressure but its so macro…
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.