At Willow Springs, I could not even top 100. Even exiting turn 8 at 95 which is about as fast as any regular road car can go, I still couldn't top 100 on the straight. My AT Lanos I couldn't go no more than 85 around that turn as I didn't have the experience I do now and it would hit 105 on the straight. Mostly due to aerodynamics I'm sure.
Anyway, other than power my biggest complaint is suspension. Even with the H&R's there is WAY too much body roll. The front tires have to do all the work, with some sways that would be fixed.
Yes I have polyurethane swaybar bushings up front, they are loud when it's cold going over speedbumps, but between them and the front lower brace they make the car very neutral. If I brake and then flick it, I can get the back to rotate quite easily. No way it would do that without those two mods.
Tire/wheel I have 205/50/15 Kumho Ecsta SPT's and some 12 pound Rota Circuit 8's. I picked the combo so it would be lighter than stock and have a lot more grip.
My other complaint for this car on a track is the flex in the chassis. It needs a lot more bracing.
More power, it would need better brakes. I only lost the brakes a couple times my last track day which is not too bad when hard braking from 80 to 35. When I first tested them on a downhill canyon run I was able to get them smoking to the point they wouldn't even slow the car after 3 50-10 MPH consecutive hard brakings. This was with the stock wheels, I suspect the additional airflow with the Rotas will improve that.
Congrats for taking your car out there, it's a lot of fun and the comments are funny too. One guy was all "OOH LOOK A FIT!" Someone else referred to it as "the rental"