Hey all!! This will be my first time autocrossing my Z this upcoming sunday and I have a few questions for anyone that runs the LMGT4's like me!

I'm running the 245/40/18 and 275/40/18 pattern as recommended and I would like to know if anyone has a recommended tire pressure for a perfect balance! I know I used to run quite a range with my Crossfires 18-19in wheel base for autocrossing and I would like to hear if anyone has any opinion on what I should use!! Any help would be gladly appreciated! Thanks!