Interesting to see the torque graphs easy_rider911 posted. They show in black and white the TWO very noticeable flat spots that the 997S has. Try this - find an open space and do a full throttle pull in second gear from about 1500rpm. You'll notice the car pulls strongly until just over 2000rpm then it just stops pulling any harder until about 2700 rpm. It will then light-up, pulling strongly through 3000 and 4000 rpm then goes flat again through 5000 rpm. It then lights up once again at 5500 rpm for a rush to the red line at 7400.
I've noticed these 2 'holes' in the power delivery of the car ever since I've had it. It's been checked over several times and everything is working normally. I've always thought something was amiss but here are factory graphs showing the torque output of the engine flattening out exactly where I've felt it.
I'm amazed at Porsche letting an engine out of development with such an uneven power delivery. For me it spoils the car. No wonder so many other owners can't wait to start modifying their 997S. Looks like I'm going to have to do the same.....!!
Ian
Edit: PS - The exhaust pic above is the full Europipe system - nice but expensive.
www.europipe.be