|
I have always thought that E92 M3 gear ratios are rather long. This could turn out to be a great upgrade.
1. Top Speed is not really affected. Theoretical top speed with stock diff is 196 mp/h (315 km/h). Theoretical top speed with 4.10 diff is 183 mph (296 km/h).
2. Speedo accuracy does not change. This was also true for the E46. It measures the rotations of the wheel.
3. About shifting gears more often, you are probably right. But with the shorter gear you can skip downshifting many times, so it could go either way, depending on driving style and traffic conditions.
4. You have to rev the motor more to reach the same Autobahn speeds, so this means more fuel, more noise and more motor wear.
|