Slicks and sizes?
#16
What I failed to mention is that the EASIEST way to generate heat is to start with lower tire pressures. You get a lot more squirm and generate heat. You may even end up with the same pressure, even starting lower than expected. The 'rule of thumb' is drop 1psi for every 10 degree F drop in ambient temp. So if you normally start at 30 psi at 70F, start with 27 at 40F. But you could take another 5 psi off, starting with only 22 psi, and see what happens. This will sound crazy, but there were times that I started with 8/10 psi in my sports racer.
Second easiest way to get heat is add toe.
But you always have to test this with your car. Much easier to do, and fewer unintended consequences with a purpose built car, as there are fewer compromises in the setup to start with.