[Formulajones]

There was another test they did on a Ford that did a little better job of what you're referring to Mike. It was pretty much the same result though using a handful of AFR heads on that one. Started with 165's and went up to 195 and then either 220's or 235's. Torque was still excellent down low. The interesting part is that the 165's and 195's were almost identical throughout.

I think Steve Brule even did an episode on Engine Masters about this theory.