Haven't used Dunlop runflats for years on track so from memory Nissan used to set them at 28psi front and 29psi rear for the Ring when they were testing. These were then checked after two laps and found to be about 38psi so they brought them down to 32psi front and rear.
Mine went up to over 40psi and I brought them back to 30psi and was told by Misuno-san to reduce them to just over 30psi. They then increased to 35psi and I just took them down to 32psi. I then had to re-inflate them to go home.