Well, I don't have a dog in this hunt and probably should stay out or this but here goes. A number of years ago when I was real heavy into car engines (specifically 383 chebbys for a claimer class dirt track) I read an indepth article written by this old country boy named Smokey Yunick. His theory on making the maximum hp from an engine was make the combustion chamber as small as possible and use a dished piston if possible. His theory was with a dished piston all the energy was directed to the center of the piston and in a straight downward force on the rod. He went on to explain that any energy directed towards the edge of the piston was not utilized as well because that energy was actually trying to turn the piston sideways in the bore. Take it for what it's worth but I didn't write the article.
I'll bow out and let the festivities continue.
I'll bow out and let the festivities continue.