I ran these in a 205/50r16 size last weekend at Grattan Raceway in Belding MI. It was a hot day, probably 90F ambient and sunny.
Tire pressure was checked following each session and adjusted accordingly. The 39 front / 36 rear cold pressure usually used on the street, jumped up to 49 / 43 hot after the first 20 min session. It took a few incremental adjustments before settling on 38.5 psi front / 36.5 rear run for the rest of the day.
My impression? The tires were hands down the greatest bottleneck on the car, by far! The loss of grip was disappointing. The tires gave up on literally every turn. And although straight line braking grip felt fine (I ran hawk DTC-60 pads up front and DTC-30 rear), the experience as a whole was offset in a negative direction. I was expecting a lot more grip going in based on how they performed out on the street. I'm convinced that a proper set of track tires would have done the trick.
Once back on the street though, they felt fine, and made me appreciate the cushy sidewall, wallet friendly price point, go-kart like feel, and balanced dry/wet weather grip. Overall, I'm going to say that this is a great tire for most people to use out on the street, but don't be like me and expect it be your end all be all summer solution. The 340 tread wear rating shows this. Having said all of this, 10/10 will buy again.
Now to find a dedicated track tire... hmm