I only run 1-2 autocrosses a year just to get out and play. The first couple I did with my RS last year were on the Toyo all seasons the dealer had installed (I bought it used) . This spring I put on PS4's for my summer tires. Since I do so few autoX I prioritized a street performance tire. I looked back a lot of pages but not seeing info for street tire pressures - it could be that serious autoX needs to have 200TW tires so most of the discussion there.
Here is what I have
- PS4 tires stock size on stock 19x8 wheels
- bone stock suspension - parts, alignment etc.
At an autoX a few weeks ago I started with about 43F and 41R. I forgot to bring my chalk... but sure seemed like the tires were rolling over past the markers. I upped to 46F 44R. Without chalk hard to tell if they rolled over any less. Have another in a few weeks (last one of the year - then snow takes over) and thought I'd see if there are any recommendations. I realize most are on autoX tires and those pressures do not apply. If anyone has experience with a stock setup let me know!!
edit - here is a pic of a front tire - what led me to add is how far down the dark pattern went. when looking closely the abrasion isn't too bad around where triangles would be (there are other little icons) but you can see there had to be something going on. Maybe this is normal with street tires? Or with PS4? Or just touching pavement but not wearing?
And my times were not too bad. Since I don't run often I'm of course not at the sharp end of DS, or over the past 20+ years whatever class/carr I"ve been running. I was 5 of 6, 4 sec ahead of 6, and about 4 sec back from P1. Only a sec back from P3 and 4th. And much closer to P1 than when I had the all seasons on!!!!!!!!