I had nitrogen in my Porsche track car; still had significant pressure
increase from tire Kemps. Went back to normal air.
My vote: Nitrogen doesn't work as sold. I started with both new tires and
vacuumed tires with no difference. Still had high temp pressure increases.
Richard of Ky
BN7 440
------Original Message------
From: Dr. B
To: healeys@autox.team.net
Subject: [Healeys] Tire Pressure
Sent: Dec 16, 2009 17:35
Rather than make unsubstantiated statements, "Nitrogen doesn't react to
temperature changes ..." maybe we should look at the scientific data.
From the Handbook of Chemistry and Physics the thermal coefficient of
expansion for Air is 0.0036728 while for Nitrogen it is 0.003673. These
numbers refer to the change in volume per unit volume per degree Celsius
temperature change. So for a volume of 10 lites (Air vs Nitrogen)
undergoing a temperature change of 10 C the change in volume is 0.36728
liters for Air and 0.36730 liters for Nitrogen.
Thus, the statement that Nitrogen doesn't react to temperature changes
as much as air is false. And claims by tire manufactures or sellers is
just that claims, not facts.
Bad science is just like bad math - BAD!
Art Braundmeier
BJ8/43199
--
?Plagiarism is an academic crime,
punishable by academic death.?
---Tommy Lee Jones as Marshall Sharpe in Man of the House
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