Here is my Zandvoort setup. Best time: 1.38.1 on mediums and 1:37.9 on softs (1 click less all round in tyre pressures if using softs) in server conditions so possible to go quicker with optimal hotlap conditions
The more pumped up a tire is the more rigid it becomes, what follows is less grip due to scrubbing/friction. Thus higher tire pressure leads to elevated temperatures. @Vascu Dalmao