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Miket
11-11-05, 01:13 PM
Just reading an article in our local rag, that a local tyre fitters is now filling tyres with Nitrogen.

Supposed advantages are:-

Improved comfort and ride. :)
Improved safety :)
Increased fuel saving of 2% :D
Improved tyre life of 20% :D

Anybody taken this route and found any difference in any of the above. :confused: :confused:

crendonman
11-11-05, 01:19 PM
Sure its not Nitrous Oxide Mike !!:D :D :finger:

It doesn't help with Fuel economy , but it sure makes you laugh when you get a puncture.:D :thumb:

Grease Monkey
11-11-05, 01:19 PM
Sounds like this story is running 7 months and 10 days late...

dave.n
11-11-05, 01:20 PM
I know nothing about chemistry or much about anything really, but isn't Nitrogen cold?
Therefore take a lot of warming up e.g tyres. Then does it not expand at a higher rate than air?
I gonna make some phone calls.

kitcarman
11-11-05, 01:22 PM
Hi Mike,
Sounds like lead pellets in your fuel line to me!

Are they charging for the service?

I could imagine benefits from using helium but none from nitrogen.
Den

Miket
11-11-05, 01:24 PM
Sounds like this story is running 7 months and 10 days late...
Yes and I didn't get a serious answer last time. :finger: :D

Miket
11-11-05, 01:27 PM
I know nothing about chemistry or much about anything really, but isn't Nitrogen cold?
Therefore take a lot of warming up e.g tyres. Then does it not expand at a higher rate than air?
I gonna make some phone calls.
Apparantly it is an accepted gas for filling aircraft tyres and racing car tyres because there always at a constant pressure, hot or cold.

kenf
11-11-05, 01:33 PM
you learn something everyday, even though this has been known about for several years...

http://www.toyo.com.au/tech_info11.html

first website I found when searching

:thumb:

dingocooke
11-11-05, 02:27 PM
Hi Mike,

You can buy a lot of foot pumps for the cost of an annual gas bottle account with BOC!

Personally I wouldn't bother, most racers don't bother either; unless they're in F1, and even those guys do outrageously laughable things; e.g elastoplast across the bridge of their nose to hold their nose open for better breathing; give me a break!

As for Nitrogen giving you better fuel economy, tyre life, and ride comfort is somebody having a laugh?

Nitrogen is a compressible gas just like the mixed gases in air, both behaving as natural springs, but the difference in compressibility of the two gases in a car tyre is so miniscule it would need the national Physical laboratory to measure the difference!
The only real advantage to using Nitrogen is a slightly slower pressure drop because nitrogen passes through the rubber slower.
Anything else is just hype I'd say IMHO.

Steve:thumb:

ldtopham
11-11-05, 03:24 PM
Nitrogen is used in Aircraft tyres, nothing to do with it being able to maintain a constant pressure with temperature changes though? I have tried to check a 325psi tyre (cold) when hot and the guage didn't like it too much! The old grey matter tells me that the main advantage to nitrogen and this is why it is used in aircraft tyres is that it remains in the tyre longer than standard compressed air when temps are increasing and decreasing. Something to do with rubber tyres having a bleed rate (which changes with temp changes) and nitrogen is less susceptible to this ....there is some technical jargon for this but can't remember it! Confuesd....I am:D

dingocooke
11-11-05, 04:17 PM
I guess we can safely assume we dont need it unless we're likley to qualify on the front row at Silverstone, or were flying at 35000 feet than!!
Steve:thumb:

queeniee
11-11-05, 08:16 PM
All gases have the same expansion rate depending upon the temperature and follow the same physical laws(temperature, pressure, volume: see Avogadro, Gay Lussac, Boyles Laws of "perfect gases etc...)The advantage of using nitrogen is chemical: Nitrogen is a non reactive gas;) and does not oxydize the rubber and keeps their properties longer.(helium would do the same and make your tires lighter but it is more costly). For long lasting storage and for soft drag slicks, we use Nitrogen. Nitrogen (N2)not to confuse with Nitrous oxyde which has hilaring properties.

Purple AK
11-11-05, 08:47 PM
Being as Nitrogen makes up 78.1% of the earths atmosphere we can safely assume that Pure Nitrogen filling has of little or no advantage to the average driver for the costs involved :rolleyes: However the lack of Oxygen (Fire Inhancer) renders it a prefered filling in specialised cases. Petrol Tankers etc