Well, -4.2 camber in the front was too much. The inside of the tires were visibly wearing faster than the rest. I think this was primarily caused under braking. Turn in was amazingly sharp. But the understeer we were trying to improve was still there. Applying throttle allows the front to bite again.
We think the ride height is too low with only 1/2" of shock travel up front with the car at rest. During high G high speed turns, the bump stops engage effectively increased spring rate and causing the push.
I raised ride height in the front a total of a 1/2" and also raised the rear 5/16". This maintains 3/4" rake measured at the rocker ends and 11/16" measured at the jack pads.
I guess the new ride height also allows for aero hardware this coming winter.
Also, this car had around a 0.25 deg mis-match with camber using TC Kline camber plates. This equates to a 6mm difference measured at the top of the strut.
A call into TC netted a pair of slotted camber plates. Likely one of the few to have slotted TCK plates. I roughed these in using the iPhone app. Basically, the LH is 6mm further to the outside of the car than the RH.
F3BDDC6C-3DB6-4704-9D8E-534B93860277 by
D S, on Flickr
21FE7610-42BE-4315-B927-73C11D24D528 by
D S, on Flickr