Nitrogen in my 997 Tires? Bring it on!
10-21-2005 | 12:00 PM
#16
Rennlist Member
I agree, but my point was how that relates to our cars and I think I can make a case that states that it doesn't make a significant difference.
It certainly would not hurt to use nitrogen, but whatever benefits there are would not be noticeable.
I would definitely not use the green valve caps!
It certainly would not hurt to use nitrogen, but whatever benefits there are would not be noticeable.
I would definitely not use the green valve caps!
Originally Posted by OCBen
I believe he was directly quoting a source and just failed to cite proper attribution for the referenced source.
10-21-2005 | 12:09 PM
#17
My car allegedly had N2 in the tyres when I bought it. What do I use now? AIR!! I don't think it makes a lot of difference on the road. If you use air you can fill the tyre up at any time vs N2.
Harry
Harry
10-21-2005 | 12:13 PM
#18
Originally Posted by Marv
I agree, but my point was how that relates to our cars and I think I can make a case that states that it doesn't make a significant difference.
10-21-2005 | 12:19 PM
#19
Marv are you new to Porsche ownership? The most **** retentive bunch there is. We'll agonize the merits of colored wheel caps! So the nitrogen topic seems to fit this bunch of merry owners. (me included)!
10-21-2005 | 01:57 PM
#20
Rennlist Member
IF i take out all the air in my tires and use a electric air pump to pump them up again, will that have the effect of not introducing water into my tires? 
10-22-2005 | 12:04 AM
#21
When hot, nitrogen does not expand like typical air does. In other words, on the track with regular air in your tires, you'll gain pressure (between 7-10psi, typically, in my experience). With nitrogen, you'll gain maybe only a couple lbs. More stable and predictable. The lack of expansion properties - caused by the lack of water in the tires - is the best reason to use nitrogen, imo.
10-22-2005 | 01:28 AM
#22
IMO, for street cars, there is almost no advantage to using nitrogen. Sounds like a scheme that these businesses use to make a little more revenue. What's next? The cooler coolant 100% water dyed blue?
AW
AW
10-22-2005 | 10:07 AM
#23
Rennlist Member
Well, I thought I wasn't new to Porsche ownership.
Originally Posted by texas911
Marv are you new to Porsche ownership? The most **** retentive bunch there is. We'll agonize the merits of colored wheel caps! So the nitrogen topic seems to fit this bunch of merry owners. (me included)!
10-22-2005 | 10:24 AM
#24
Rennlist Member
Both nitrogen and oxygen observe the pV=nRT equation in the same way. The only difference I can see might be in moisture content (as you pointed out). Shop compressed air is notorious for containing water.
So what do the big-boy racers use?
So what do the big-boy racers use?
Originally Posted by nkhalidi
When hot, nitrogen does not expand like typical air does. In other words, on the track with regular air in your tires, you'll gain pressure (between 7-10psi, typically, in my experience). With nitrogen, you'll gain maybe only a couple lbs. More stable and predictable. The lack of expansion properties - caused by the lack of water in the tires - is the best reason to use nitrogen, imo.
10-23-2005 | 02:28 PM
#28
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Race teams use nitrogen, partly because it is convenient and it will have less air pressure gain than normal air. If you used an inline dryer from a compressor it would most likely be the same effect.
10-23-2005 | 07:03 PM
#29
In response to the "infallible German engineers" comment concerning the use of H2 in The Hindenburg...they used H2 because the USA had a monopoly on all Helium supplies and refused to sell any to the Germans.
Loved Riad's comment that got this ball rolling anyway!
Loved Riad's comment that got this ball rolling anyway!
10-23-2005 | 09:10 PM
#30
Thread Starter
Burning Brakes
Originally Posted by Marv
Better air retention: You should be routinely checking tire pressure anyway.
Enhanced Fuel Economy: You bought a 997 and worry about fuel economy?
Longer Tread Life: On a 911? Nothing scrubs rubber off a tire faster than a 997, except maybe my 993. Rust? Did you get the steel wheel option for your car?
I can't get a year's driving out of my tires 6-8K miles. Nitrogen will have no significant effect.
Slow chemical aging: If your tires ever show signs of dry rotting it is because you are not driving your car. Again, your normal tread wear will exhaust the tires long before oxidation even begins to set up camp.
Now I suspect that you are not driving your car enough. How else do you find time for these activities?
Enhanced Fuel Economy: You bought a 997 and worry about fuel economy?
Longer Tread Life: On a 911? Nothing scrubs rubber off a tire faster than a 997, except maybe my 993. Rust? Did you get the steel wheel option for your car?
I can't get a year's driving out of my tires 6-8K miles. Nitrogen will have no significant effect.
Slow chemical aging: If your tires ever show signs of dry rotting it is because you are not driving your car. Again, your normal tread wear will exhaust the tires long before oxidation even begins to set up camp.
Now I suspect that you are not driving your car enough. How else do you find time for these activities?
I just tried to stir up some friendly debate and conversation on a topic that maybe has not been re-hashed within the last 2 weeks!!
But we can go back to debating the proper way to break in a 911 again if everyone wants! 
I did clip that source by the way from some random auto internet site.
