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      04-25-2012, 01:16 PM   #20
ILoveChess100
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Drives: 2011 135i (DCT, Sport/PremPkg)
Join Date: Sep 2011
Location: CA, Orange County

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Quote:
Originally Posted by MDork View Post
Interesting thread - why are people running higher pressure in the rear - unless the assumption is the fronts will have a larger temp jump when hot? Considering the weight distribution I'm not sure if that would be the case. I suppose it would make the ride more compliant. I get my Uno on Saturday and will have a fresh set of PSS - will mess around with pressure shortly thereafter...

The fronts definitely warm up more than the rears if you are driving mountain roads (not true on the track).
On a nearby 4 mile twisty road my cold 34.5 F/R went up to 39/37 F/R after 2 runs up and down the hill.

Also I've heard that the original 36/39 for RFT is to induce a little bit of understeer and make the car give an early warning that you are pushing too hard.
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