The tyre's optimal pressure is 86kpa? Which you cannot set in the setup menu. Is there a reason behind an optimal tyre pressure of 86? Do you know the tyre load figure? Is it around 0.03? If you equate the dry weight x 10 (Newton) / 4 (tyres) x tyre load + base pressure would you get an estimate of optimal tyre pressures? Obviously this would only be standing stats. But the weight distribution is not 50/50 so dividing by 4 is a little inaccurate? What is the weight distribution? If (1440x10/4)x0.03+86 you get 192kpa. Does that sound about right? And tyre temperatures are optimal at 95C but given just a couple of laps and they soar right up to 110 and beyond. Is there a way to combat this?