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jdp530
Tire pressures are tough, people don't like sharing those as it can make a large difference and suggestions have a lot of variables to consider so kind-hearted folks are wary of leading others astray.
No direct help but I like running the ZII SS at about 26 psi 'cold' (that is I set them in the morning when I arrive before the sun has the chance to skew temps and pressures). I haven't chalked the tires recently but I did not see anything alarming last time I did and have actually put nearly 100 miles of street driving on them when I was too lazy to bump them up.
If you have a local event that gets you more runs in (place I run at gets me ~6), maybe a test n' tune, start 'em up at where you did before and after the first two runs (for a baseline, the cold run doesn't really count imo) drop a couple psi between each run, that's how I got down to as low as I did, actually dropped 1 psi lower than where I felt the car was the best and the car definitely got worse. If you've got an air tank you can go the opposite way, a ~10 gallon should be enough to bump all tires 5 psi if memory serves correct.
