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Old 11-07-2010, 08:06 PM   #32
supershaft
because I can
 
Joined: Sep 2010
Location: San Francisco Bay area
Oddometer: 8,830
I meant the surface of the cylinder bore.

Rings do effect the piston's ring grooves! I would call that the surface of the piston. Ring grooves have specs just like the rest of the stuff in question.

Knowing the specs is one thing and taking accurate measurements is another. It takes skill, tools, and experience. And then it takes some experience knowing what top end specs BMW pulled from outer space and what specs work here on planet Earth.
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