As your running road tyres try to keep them (when hot) at an average recommended road tyre pressure.

30 ish should be fine on a cool / normal day

28 ish on a hotter day

Remember in the morning when they are cold they will increase during the first session so set them below this figure initially - and check them constantly during the day

Build up the pressure during the first 2-3 laps and remember the grip level on a cold tyre is a lot less so take it steady in the first few corners.