[-Jayson-]

GM didnt raise the redline on the ecotec motors to give it better HP numbers. The 2.0T has a redline i think of 6250. I have the 2.0 SC which is basically the same motor and i daily hit the rev limiter of 7000RPMS, 27K miles and no problems at all, engine is running great. 2.0T stock dynos usually put down 230-240WHP.

the G85 limited slip is a real limited slip differential. The traction control is its own independent feature that pretty much cuts spark when it senses the wheels spinning. This LSD isnt designed for straight line performance, its designed to improve handling. It sounds like you dont understand exactly what an LSD does, might want to read up on it at howstuffworks.com.

The 2.0, 2.2L and 2.4L are basically identical engines, they just have different internals. The 2.0L has been stroked to lower the engine size and allow for higher revs. It also has forged rods and crank. But all the engines share the same block. There is nothing legally preventing them from putting a bigger engine in the car, there are no laws governing HP/weight ratios. 2.4L with a turbo isnt possible from a factory stand point, that engine makes its power through compression, 11.5:1 which is insanely high to make a factory boosted car like that, also the bigger displacement means longer stroke per piston, something that isnt really wanted on high reving 4 cylinder motors. Engine displacement on forced induction 4 cylinders isnt as important as compression ratio and PSI. When you put boost on an engine you are increased the cylinder size. The 2.0L is the amount of air the engine can suck in per 2 revolutions of the motor (its a 4 stroke), but when the 2.0L is running under boost, the engine is sucking in much more than 2.0L, so its displacement is more so variable.