Boxster 986 Autocross/Track Setup

[Anker]

For the RE71-Rs the best tire pressure is just over 30 PSI front and back. Fine tune it by chalking your tires. Check the pressure after each run to compensate for heating.

I have not run Toyo R888Rs on track, but have tracked RE71-Rs and found that they overheated. Suggest you start with a fairly high pressure, like 34 PSI front and back and measure tire temperature with a tire pyrometer after the tires have warmed up. For the Toyos they publish a recommended temperature range. If the tire gets too hot raise the pressure, if too cool, lower it.