I haven't autocrossed for about 7 years, and then only in AWD cars for the most part, but here is my current setup:
Velox PG-5S wheels, 17x7 +42
Hoosier A6 245/40/17, running 34F, 32R pressures
Strano 22mm hollow front bar, Whiteline adjustable endlinks (currently at about stock length or else the bar hits the frame)
MCS DA shocks
Camber: Front about -1.2 on each side, can't remember the rear
Toe: 0 front, 1/16" toe-in rear
Perrin catback
Radium catch can
I' wasn't able to do any events last year and have done 3 events so far this year so I'm just trying to dial things in. Results so far have been mixed imho, mostly driver related.
With a good driver it's definitely capable of trophying but if the right drivers show up in the Solstice, MSR, and 370Z it's not going to be in the top 3. Not on a nationals style course IMHO. Jay Toussaint has a well prepped one but he was pretty discouraged after Dixie (lack of torque and rev limiter) and may not run it nationally any more.
If the rev limiter didn't completely suck the life out of the car it might be a different story. Having to shift or just coast to not hit it just costs time. If we move to streets it may slow things down a little bit so it's not as much of an issue, really a couple MPH makes a decent difference. I won't be running race tires next year, so I'll either be in the Street class or RTR if that doesn't pan out, or STX.