[HawgRyder]

I remember an experiment by Bill Elliot (NASCAR) years ago...he had the piece of the piston in between the first and second ring land machined in a sort of saw tooth design.
The idea was to build up a pressure wave to help support the top ring and prevent it from twisting (so that the face of the ring stayed in better contact across its surface).
Also..he bumped the compression ratio up near 17:1 in the engine (incredible!)
The end result according to him (and his engine builder) was...the pressure wave from the mod leaked up around the first ring slightly...and created a rolling? wave front to prevent the charge from reaching the cylinder wall all around (360 deg I guess) and this prevented detonation from bouncing off the wall?

The mod was banned about 1/2 way through the season as being a cheat or something....but it is interesting.
Bob