The best cylinder bore finish is one that provides a good sealing surface for the piston rings, minimizes blowby while also retaining oil for proper ring lubrication. The cylinder bore finish will depend on the type of rings used, the type of honing stones used, and the boring and honing techniques used to finish the cylinder bores. Surface finish parameters and techniques to optimize the finish and reduce bore distortion are all covered in this article:

Adapted from an article written by Larry Carley for Engine Builder magazine