What pressure should I run at the track? I was recommended 20 psi, is that too high/low?

 

a good way to get the best air pressure for your car is set it at what you think is good, then spray a small strip of water in your drive way, and leave a nice dry spot directly after. then drive through the water, and measure the width of the wet tire track. add or remove pressure until you get the widest possible patch, with even pressure across the whole thing.