Thanks for your reply. However, it didn't really answer my question. My question wasn't about the advantages and disadvantages of different types of cams. That variable has been taken out of the equation.

I'll try to restate it so that it makes more sense. What is happening to the valve when it floats? Is it hitting the piston? If so does it always do that, sometimes do that or never does that? On the other end, what is happening? Can the valve damage the lifter or can the lifter damage the valve? Or is this just a temporary loss of power and rpms that will go back to normal when the rpms drop enough for the valve spring to catch up?

The other things you bring up, while probably pertinent to a general engine question don't seem to me to be important considerations concerning my question. Whether or not the heads go back to Brodix for rebuilds shouldn't matter in the context of this question.

The reason I am being so specific is that I don't want this topic to just bounce around with little tidbits of information here and there, but never answering the specific question.

I plan on starting a thread to discuss pistons too.