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Can someone elaborate a little about CNC porting? I seem to bypass most magazine articles on porting, but I seem to recall that it involves a computer programmed machine instead of porting by hand?
If so, I suppose the advantage is a more consistant port size from cylinder to cylinder?

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I think that all of the CNC programs are based on hand porting two cylinder ports, a left and right hand port(I hope that makes sense ) to get the optimum flow and then have the CNC probe measure and store all the numbers in its memory and make all the other ports match those two, one left hand and one right hand If I'm wrong I hope someone will correct me Jeff, Dan, Todd?