[Trackrash]

Originally Posted by sugarwood

Stupid question of the day, but why does it matter if the piston has nicks on top?
It still gets pushed down by the spark plug ignition, no?

With damage to the area above the rings, there is a very good chance that the forces either weakened or distorted that area. You would hate for a ring or piston to break after trying to reuse such a damaged piston.

If the rest of the motor is good, I imagine there are good used piston and cylinder sets available.

Check post #6 in this thread. http://forums.pelicanparts.com/911-engine-rebuilding-forum/956309-mag-case-porsche-historic-racing.html