First autocross of the year

[AGAV13]

I am attending my first autocross this Sunday, it will be my first time doing an autocross in my 135is. I had previously completed autocross for the past 3 years in my old Civic Si Sedan. I plan on going out with an instructor for the day as it is my first rear wheel drive car. I am still running my stock runflats on the car and was looking for sugestions on what tire pressures i should be running for the day. The weather looks like it will be in the 50's with the runs lasting for less than a minutes with about 8 runs. Any suggestions on tire pressures for the day? I plan on running higher psi with the intentions of lowering if needed. I have read that the side wall os the tires are extremely stiff so im not sure how much extra pressure if any to add. In my si, i would run about +7-10 psi for the day. Any information is greatly appreciated.

[Ginger_Extract]

IMO, don't fuss with tire pressures until you have more seat time with the car. Just make sure they're not low.