shortening the wheel base is suppose to help in HIGH bite situation to allow the car to turn better.......in fast direction changes, however in large sweeping turns, it would do just the opposite. It would be good if you are running on small electric tracks.
If I am incorrect, please someone correct me. This is just theory. However, I don't realy see a need to do this, there is way too many other adjustments that can be done to make the car do what you want.