They are designed to improves control, ride and performance. Get up on plane faster, and eliminate cavitation and porpoising. My Dad put one on a boat with a 50 hp. and it definitely helped with the planing aspect, I'm not sure about the other stuff. To your other question about weight in the front of the boat, that might also help with planing the boat, hwoever won't do anything for stabilizing. If you are having issues with bow rise, I would look at the whaletail.