Quote:
Originally Posted by mdm
It would be great if we did not just make stuff up here, but have some sort of physics-based estimate, even a crude one.
Because if it is 1 psi, then someone may care (again, in a race car, I am not sure if most handheld tire pressure metter have accuracy better than 1 psi). If it is 0.05 psi, it's another story.
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If you read my entire post I do reference personal experience of seeing ~0.5 psi difference between Nitrogen and atmospheric air in go-kart tires (5-6" diameter, 5"-9" wide) we typically ran at around 10 psi and saw a ~2psi gain after coming off track.
I do appreciate you chemistrying it up though.
Edit: I do have some reservations about your math as I am not saying there is a 150% difference, rather my example is ~3% difference between the two scenarios (~30+3 vs ~30+2), but I am not too bothered by it. Like I said, I'll actually run an experiment if I ever get my tires filled with nitrogen.