Originally Posted by dcramer
Really, and what magic force improves acceleration ?
Same reason 1st gear accelerates faster than 2nd gear in a car. When you switch gears, the horsepower and torque doesn't change.
The ONLY way to change horsepower is to modify the engine or reduce drivetrain loss.
If the diff ratio changed horsepower, that would mean an automatic M3 with a 3.38 ratio would have more horsepower than a manual with a 3.23. Which isn't the case.