I run the cold air pressures recommended for the car. Look at the label inside the drivers door and set your pressures at those numbers. I really never check hot air pressures because these tires are much less fragile than the "R" compound tires I use on my racecar.
My original alignment was halfway between the Owner's Manual track & street alignments, but I think that contributed to quicker cording of the Pirelli's, so now I run the street alignment.
With these air pressures and with a street alignment, the car handles amazingly well. The tire wear is not bad so far, except if you look at the edges of my tires you can tell that I track the car. But, you could tell that after only one track session, since I am driving between 9/10ths and 10/10ths.
As for the tires not yet being N rated--my dealership actually recommended them to me!!
Mr. B

 

I think that I was the one who recommended 37-38 psi for the PSS. At lower pressures I see excessive rollover onto the sidewalls of the tire. Part of this might be alignment and I intend to dial in more negative camber before I go back on the track this spring. Also, I believe the MPSC have stiffer sidewalls so they can run at lower pressures. Contact patch size generally increases at lower pressures.

 

When I'm on the track I engage the shock button to stiffen things up, and I think this decreases tire rollover. I've had very good results running the OEM recommended cold air pressures.
Mr. B

 

This brings up a good point about this "shock button"... To be honest, I've never turned it on in over 20 track days while I have the "sport" button on all the time . A guy in an RS told me when I first started to track my GT3 that on bumpy tracks the "normal" shock setting is more flexible for variable track conditions. And we have bumpy tracks here in Cali! So, what do you guys do with that button most of the time, off or on?

 

On any track with bumpy sections, I run with the "normal" PASM (shock) setting. The "sport" setting feels a bit more nimble but less compliant over bumps. I'm not sure you gain anything in the sport setting except on very smooth tracks. And remember that PASM adapts to the road surface. Even in the "normal" setting, it will stiffen up automatically on smooth surfaces so it's not soft by any means.

 

The Summit Point track is not particularly bumpy and the stiffer shock setting works well for me.
Mr. B

 

Just replaced a set of dead Pirelli Corsas with Michelin Pilot Super Sports. Only have 200 miles so far. Sounds on the freeway have a different pitch, but maybe a bit less noisy. They follow the grooves a bit more. Has a softer ride compared to the worn Corsas, but they seem very grippy. Haven’t had a chance to try the canyons yet.

There’s a downhill grade of almost 2 miles just before my house and I have a habit of cresting the hill at 30-35 mph with a shift to neutral. With new Corsas on the rear and half worn Corsas on the front, it would approach 60 before getting home. This was very consistent throughout the remaining tire life. With the new Super Sports its not getting above 45.

Is rolling resistance relative to tire wear?
Maybe just a matter of being too new to evaluate.

 

Hm, I have never driven my GT3 in neutral before! Am I missing something? I'm certain it would help my tire life, not to mention the mpg.

 

It would also help you keep your license to drive that 3.9. At least once a week there's a radar trap set up on this stretch of downhill.

 

That's good!

 

With only 200 miles on the Michelins, they aren't even broken in yet.
Given them another two hundred, OR one day at the track.
Mr. B

 

I've had the Michelin Pilot Super Sports on the car for 3 track weekends, and they are the best tires I've used on and off the track. The wear rate is great and the traction is great. I'll be buying another set soon. The best prices I've found are at "onlinetires.com" - no affiliation.

Enjoy your car!

 

I just checked SuperDave's vendor recommendation and the 235/305-19 Michelin Cups are $500 cheaper than tirerack with free shipping (but sales tax if you live in CA)! What am I missing? They don't say they are "N1-Porsche" on it but would that make that much difference?