quote:Originally posted by goodroc:
Joules, you just beat me by a minute. Yes you just remove the Oxygen and replace that with more (20%) Nitrogen. But the benefit is also that it is completely dry as where if you use compressed air there is usually some moisture in it. Thats why they use pure Nitrogen in Aircraft Tires. If you want a bottle for the track day just get an old Scuba diving tank or talk to your local Fire Brigade (3000psi of compressed air) and it should be good for hundreds of Tires and will be much cheaper than a Nitrogen tank I suppose ;-)
We use high pressure banks oxygen and our nitrogen tank outlast an entire bank of oxygen tanks. Oxygen bleeds down a lot quicker then a gas that can be taken to liquid.
With Nitrogen you will hold the pressure to the very end.
I think a scuba tank would probably do good but certainly not 100's of tires. If you have to have either filled then there is little difference there.
Of course working with what you have is often everything. We see nitrogen tanks pop up on local auctions for very little money routinely.
