[CMOS]

Originally Posted by Marrk

You have that backwards. A hard break-in is to seat the rings — a good thing. The cylinder bores are, in fact, imprinted with a hatch-mark pattern so that they are "rough" when new. The idea is that the slightly over-sized new rings will wear against the rough cylinder walls and seat against them. The roughness of the bores actually gets smooth very quickly. Some people say the entire process is over in the first twenty miles.

With a "rough" break-in, you are using compression to force the rings against the rough cylinder walls.

At the minimum of 10hz those things should have been mated by the time the factory finished on the dyno. I'm more worried about the chunks of metal in the oil having sufficient time to be blown away rather then trapped in between.