"Your port shape, tapering, short turns, valve job, guide work, surfaces, bowl blending, hips and roof wall should all be going after velocity."

Everything I've underlined IS primarily what makes shape, lol. I'm pretty new to this so don't think I'm debating lol. I learned from your videos and I really appreciate them. I just enjoy reading about this stuff and trying to get my mind around the flow of air through an engine.

Point I was making is that you can't focus on just one aspect of it. Just as you were saying its not ALL about volume, I thinkbyou can also fairly say its not ALL about velocity. It seems controlling the movement of air through the runner is what the pros try to do. They go to great lengths trying to get the air to stick to the short turn, including ADDING material to the floor. Somewhere I read that the ST radius would need to be around 4" to get optimal control over it. Since that is not feasible, they will allow the port to expand around the valve seat area, before it constricts again through the valve. This allows the air to slow a little and hug the ST more, which allows it to utilize more of the valve opening.

Regardless, its all very fascinating. Just wish I had a hundred sets of heads and a nice flow bench to see it all for myself