Milling a stock head

[Bruce Compton Canada]

How much material can be removed from a stock T head, and is it worthwhile? I'm a little concerned that going to a "Z" or Prus head will be too much of an increase in stress on the bottom end of my "freshened-up" stock motor. Thanks : Bruce

 

[Layden B]

In my opinion milling a stock head other than to true it up is a waste of a cylinder head.
It is impossible to substantially change the compression ratio without making the head so thin it will warp.

 

[Dodge]

.125 on an early head you can feel the difference. Not worth it on a late head.
Egge pop up pistons are a bigger bang for the buck.