Hey Jerry, one item missing what year cylinder was he testing? 87 or 88 and up?  Now I would like to go back and re dyno myself with different Spring tensions, when I did testing my PV was set at 2 turns, due  that Mat Shearer stated that his testing the longer the P/V stayed open the more low end / mid torque, I guess is come down to how the pipe design is to work with the P/V, Again Thank You Jerry for your time and patience for doing this.