Having more than 100 HP does make the W11 more lively, but adding the LSD makes it a rocket off corners, even with less than 100 HP.
If you have never driven a W11 with the LSD, you need to. Being able to accelerate through a corner without spinning the inside wheel is liberating, and allows the driver to hold a drift, greatly increasing corner exit speed. I use the TranX in all my W11s.
Note that you will need race axles, even with the stock engine. Even the stock torque will twist the standard axle in half or twist off the drive plate (I have done both in the same week) when a majority of the torque is put to the pavement.