Many variables.. front wheel drive? rear wheel drive? AWD? weight of the car? alignment? track conditions?.... as you can see the answer can get interesting.. for example I drive an MX-5 weighing 2300 lbs, with max camber dialed in and my ideal pressure is 28 psi all 4 corners to start and that might get changed a psi or two depending on track conditions that day...
My advice, experiment, the best way to do that is attend every event and practice practice practice...