Actually, if I'm reading the graph correctly, the picture is even more sobering than that: look like max whp on the 3 runs was 273....It was the torque that touched 300 ft-lbs, at around 4200 rpm.

On the other hand, you'll see these crankshaft-to-drivetrain losses for just about ANY vehicle, so it's not as bleak as it seems. When talking horsepower, you have to compare apples to apples, not apples to oranges.

Your 4.8is still a beast of an SUV, especially with all the Dinan mods you just threw into it. I think you can easily beat a Cayenne S with your package, and are essentially equal to a Cayenne GTS.

Specs from Porsche website:

Cayenne S = 385 hp @ 6200, 0-60mph = 6.4 sec
Cayenne GTS = 405 hp @ 6500, 0-60mph = 5.7 sec

The BMW company specs on a stock 4.8is are 355 hp (crankshaft), 0-60mph = 5.9 sec.
I would imagine the CAI, exhausts, and throttle body have shaved 1 to 2 tenths off your stock 5.9 time.

There JSears ! Do you feel better now?