You do notice it in a race car. My Mazda starts at 34 psi cold and it rises to about 40-42 depending on outside air and track temp with air. With nitrogen the tires don't increase as much in pressure. At 32 psi my car slides around and is a handfull untill the pressure comes up in a few laps. With nitrogen I can start at 36 and it still rises to 42, but starting at 36 makes for a more controled first few laps.
For a street car it makes no difference, even if you do track days you can do a few laps to warm up the tires before realy getting on it.
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Karl B
95 E300 D
2006 Mazdaspeed 6
2001 GMC Yukon XL
1997 Contour SVT
Mazda RX-7 SCCA race car
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