Quote:
Originally Posted by SuperchargedStealth
I like the way Wiseco designed their pistons. Skirts are nice, the top ring is way down and the oil rings are 4 rings and not typical 3. They have a very sturdy ring that sits on the bottom and the rest of the oil rings are assembled on top.
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Other makers do that too including Diamond etc, they are forced into doing it when the bottom ring intrudes into the wrist pin area where there would be no support otherwise.
So the 4th ring as you call it is there purely from need, not as a want.