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			Boyle's Law does not change. On the track you will heat up the tyres a lot more  but on the street you will doubtfully get much of an increase due to driving alone. Pump them up!!Dirk
 
				__________________Safety Chair, PCA Potomac Region
 Retired DE Chair, PCA Potomac Region.
 Retired Co-Chief Instructor PCA Potomac 2008-2012
 1971 914/6 (Factory) 3.2 Track car
 1988 911 Targa
 1986 944
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