Glad you're enjoying the 911 Carrera S. I like it a lot too.
There has been a boatload of discussion on the official forums (PC side) that the Carrera S is too slow/under-powered in the game. Of course, manufacturers like Porsche & BMW have long been known to under-rate their engine output. However, it's strange that the Porsche engineers didn't whisper into Stefano or Aristotelis's ear and say "add 25hp to put it more inline with real world output". I think the main thread that kicked it off was a test with the Corvette Stingray, BMW M4 & Carrera S. Just throwing that out there to see if you guys have any feelings about that topic. See, on the PC side we can pull down developer apps and get 0-60 times... we can get 100kph to 200kph times... we can get all of those crazy types of car magazine performance measurements and the Porsche Carrera S did appear to be a big slower than real life reports.
Also. The older Porsche's in Porsche Pack 1... The Porsche Carrera RSR 3.0, Porsche 917/30 and Porsche 935/78... You may be curious as to the brake behavior when you get out on the track with one of those old dogs. Brake Temperature is activated on those cars, if it's behaving the way it is on PC, so you've got to get a little heat into those brakes for optimum performance. Hear that brake squeal?
Hope everyone is having fun...Any questions I'll try my best to answer 'em.
EDIT: Oh, the Final Gear Ratio might be wrong on the Carrera S as well. It's been reported that it is currently set to 3.44 which is the plain Carrera & Carrera Cabriolet FG. The correct FG is 3.59....I'll bring more information regarding that matter as I learn it.