Thats funny you asked this ? boblee. I was just wondering the same thing after reading one of waterthunders statements of a boat he was riding in ran on the nose and porpised.
Most guys think a free running hull is one that doesnt ride on the nose and the spray coming off the back of the boat is about even with the headers (3 ft). Thats the ordinary guy but I have heard alot about mounting your engine 1/4 bubble low and working the bottom and getting it to run lose and walk on the chimes. Some say you put it on a concrete slab and put just enough jack in it to have it rock a little and some put less or more jack for racing, cruising and riding the hill.
Hopefully someone will chime in (cont 520) and give us the rite formula to run the hill, run the water and racing