yes, yes and yes. go to the dealership & see Bob, wouldja?

 

I'm no engineer, but I'll take a crack at this...

Tires have an ideal temperature range where they work best. If you are outside of this window (above or below), the tire will not perform optimally. Within this range, though, the tire works its best. And when your tires are in this optimal range, THEN you can add/subtract a pound or two of air to "tune" the way the car handles. In the situation you describe, the tires temps are surpassing the upper limit of the optimal temp range and need to be brought back down.

I'm sure the track hounds will add or correct as needed. HTH.

 

I am going to schedule a time with Niello next week to set my car to factory settings for now. Thanks guys.

George

 

I will start off saying that I am not a suspension expert – I think that it takes a lifetime of experience to reach that point, IMHO. With that disclaimer, I will say that I agree with all the advice urging you to get a proper alignment and corner balance the car. Corner balancing btw, can be done a bunch of different ways. I would recommend a middle of the road approach by doing it with a half tank of gas and putting an amount of weight in the driver’s seat that equals your own body weight.
Beyond this, if you do the alignment/corner balance and your tire pressures are within the normal range hot but the car still understeers, there are some things you can try. I would recommend going to a softer front sway bar setting or a harder rear setting. Are your shock settings adjustable (compression and rebound)? If so, you could try either softening the fronts or stiffening the rears.
Between adjustable shocks and sways (and tire pressures) you have lots of combinations that could work to solve your problem. There is no one correct setup. They all have their own characteristics, some subtle and some not. It all depends on how you like your car to feel. And if you really want to get **** about it, you can get into setting up the car for specific tracks. I enjoy experimenting so do this regularly, but it is certainly not necessary to do this. Once you find a good general setting, you can usually run it at lots of different tracks and have good results. When it comes down to it, faster lap times are mostly about knowing your own car and being able to manipulate its performance traits at the right moment in time.
Good luck. I hope that you get your car setup the way you like it and get back on the path soon.

 

GT2 and GT3s are well known to be very sensitive to alignment. I'm pretty sure you'll be amazed at the differecne an alignment will make.