Cylinder head dyno shoot out

In another thread Brian Hafliger talked about a port being 'out of balance'. I've thought a lot about that. I think this TF head is the perfect example. Opening up the pushrod pinch and the chamber make both areas more efficient, or capable of flowing more air with less pressure drop through that section. That really exposes or puts additional pressure on the short turn. With the larger valve I've seen velocity above 500 fps in the center of the apex. Even a stock TF with a 2.02 valve has apex velocity in the 460-470 range.