It depends, i usually set my car at .5 inch rake (Front .5 inch lower than the rear) and I found that at speed the rear got pushed down to pretty level.
I have seen most japanese nsx being the rear a little lower, I have yet to try that, but then it also due to the alignment and they have stronger springs in the rear.
I have seen most japanese nsx being the rear a little lower, I have yet to try that, but then it also due to the alignment and they have stronger springs in the rear.