Tire PSI for completely stock autocross?

[djfuller]

On the stock Michelin's I've been running 40 front and 42 rear after I tried the chalk line trick.

[Ingen]

On stock bridgestones I ended up at 38 front and 30 rear, cold. The rears heat up fast, the fronts don't. I had the fronts rolling over on the sidewalls hard. Like way below the wear arrows.

I was stillll bad though. First timer blues

[Sccabrz192]

I'm running 35-36 PSI rear and 37-38 PSI front hot pressures on the OE Michelins on a completely OE BRZ. The lot is a very large asphalt pad with fairly large sized aggregate and has quite a bit of loose gravel. We don't have any issue with roll-over at all. We ran 2 drivers at the first event and 3 drivers at the second.

For reference I have been around 1.7-2.5 seconds off the top regional driver in the first two events this year, who happens to be running a FR-S in RTR on BFG rivals with an exhaust and FSB. He paxed event #1 and was about 3 thousandths from PAXing the second event... so I don't think I'm too far off what an OE setup with the Michelins are capable of in that regard.