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I did a little reading up/research. It sounds as though nitrogen may only have a small effect on the cold to hot pressure delta. In a HPDE setting it may be of little use......just wait a lap till the pressures come up. In a race setting you may not have that luxury. You want to go 100% from flag to flag. For example we want to run about 30psi hot. That means that we start at 22-25 depending on the corner. That is low......if we can move that cold temp up 1-2 degrees using nitrogen then maybe it makes a difference. **keep in mind these pressures are on a 3000lb. E46 M3 race car and do not translate to the e9x M3.
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