[justpete]

Originally Posted by andrey_gta

Going up decreases the top speed of each gear, so yes probaly 7% increase in RPM for a given speed, but acceleration is better.
@justpete swapped in a 3.73, I wish he would comment on the new shift points and daily life. That is a 15% increase and its very tempting because of numerous junker 3.73 parts for sub $500

For a 128i to get 3.36 or 3.46 we have to either get a custom small pumpkin or think about drive shaft mating to large one and half shaft fitments. I have no idea what is a direct swap

With a 15% increase in torque at any given speed it's actually easier to drive on the street, not to mention being a lot more fun, too. It does rev higher so shift points move up but it's not an issue really. It does require more shifting but by allowing it to rev higher between shifts it doesn't matter much. You can still short shift and keep things quiet but if lots of torque is needed it's going to have to rev higher than before so it might get loud depending on exhaust. Since I have the race clutch now it's easier to shift smoothly at higher revs so it works out. Loudly, but it does work out.