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      07-23-2012, 08:43 AM   #5
Brigadier General

Drives: Jerez Black E90
Join Date: Sep 2007
Location: STL

iTrader: (3)

Had a chance to get these dialed in over the past few events, and here are the settings I've settled on for autocross Balance is very good now, and any understeer I experience is a result of overdriving the car. Other relevant parts on the car for reference are camber pins are pulled in front, turner endlinks and RD Sport front bar on full stiff, and 295/30-18 and 315/30-18 hoosier A6's.

Bump: 10 clicks from full soft
Rebound: 8 clicks from full soft
N2: 125 psig cold

Bump: 7 clicks from full soft (been using this adjustment to tune on-throttle behavior)
Rebound: 8 clicks from full soft
N2: 250 psig cold

What I found with the 200+psi pressures in front was that the ride height penalty was not worth the extra effective spring rate, and I was giving up front bite due to ride height and loss of static camber. With the struts at 250 psi I was at -1 degree, at 125 psi I'm at -1.4 degrees. Would be nice to have the extra N2 pressure without the ride height penalty but that's life, can't change the spring perch location in Stock class.