Um. The rears need to be higher than the fronts.

 

All bets are off, so to speak, for track use. Do what works best in order to get the feel from the tires you need. Most track tires require constant pressure changes in order to compensate for wear, surface composition and condition, temp., etc. There are too many variables to be able to say the "proper" way to do it.

On most cars, start with inflation pressures between 35 and 40 psi ("cold" inflation pressures for autocross use and "hot" inflation pressures for racing use). Cars that are light, well-balanced and relatively easy on tires will find slightly lower pressures may work for them, while heavy, high horsepower cars that are generally harder on tires may find that they need slightly higher inflation pressures.

Generally adding air pressure in small increments (2 psi) to the tires on the end of the car that loses traction first works best. For example, if a car is understeering, add pressure to the front tires. If the car is oversteering, add pressure to the rear tires.