1) I just go a question, a race attented a weeks ago i have to left the race because my front tyres (XFR GT, front real wheel drive) where warming up too fast, from a nice green color to a kind of purple color, I stopped the car, wait a couple of minutes and the tires get the green color again. Obviously, my setup was wrong, the point here is ...where is my mistake?? high pressure of the tyres? High set of springs? any advice will be welcome..
2) Any advice to setup a rear wheel drive car to avoid wheelspin ? I mean , how to setup differential or dampers or springs to can be able to apply the full throttle in the apex?
LFS the only game, where is not easy to drive with a poor setup, instead of Rfactor, where this game with no setup the car is easy to drive, if you modify something the car feels the same.

1) Tyre pressure and camber has the biggest effect on tyre temperature, you either had too low pressures, and or, too much camber.

2) The only "real" way to avoid wheelspin is to moderate throttle control, HOWEVER, you can use weight transfer to your advantage, by shifting the car's weight over the driven wheels on acceleration.
To do this I normally buy either making the rear suspension softer and less bump damping, and/or increasing front rebound.
You can also reduce the amount of power diff locking you have, and soften the rear anti-roll bar.

thanks for the advice

the info dan gave you on point 2 is for RWD cars. on front wheel drive cars increase the front rebound and rear bound.

Quote from BenjiMC :

the info dan gave you on point 2 is for RWD cars. on front wheel drive cars increase the front rebound and rear bound.

As was his question number 2 which Dan was responding to ("Any advice to setup a rear wheel drive car to avoid wheelspin ?")

oops heck it's there if you need it anyway