The top rings seem to be getting thinner and harder as the ring manufacturers move forward. The problem is that the package includes the hardness of the block, design of the piston and how far down the top ring groove is from the top. Also gas ports come into play and how many. With all this...
Would anyone like to comment on new trends in cylinder honing of automotive engines ? Diamond stones have been around for awhile, but I hear the trend in the performance industry is turning back to the conventional, silicon carbide stones.
