Originally Posted by wonho
If I were you, I'd start from 36/36 or maybe even 40/36, and take the first few sessions as trial and error and react according to observations.
The starting point depends a lot on the day, how long the course is, your driving. I know for the tires that I run, Hankook RS-3's, they feel best when they are around 38-39 HOT.
Starting 40/36 COLD may not be optimal. But then again, I'm talking from road course experience so I'd imagine on a much shorter, one lap auto-x course may be different from my knowledge base.