The recommended tire pressure on my car is 35psi cold. On the street, once warmed up that equates to about 40psi. But if I were to run that on the road course, those pressures would go much higher due to the increased heat and make the tires too greasy under those extreme conditions. So I lower it to about 30psi at the track so they come up to about 40psi under track conditions. The front left I may drop an extra pound or two because of the high speed right corners.