Nux -- I just happened to take a look at that post that you pulled off the 993 forum and that was actually my post from a long time ago. What I found interesting is that dyno graph is not what I saw on future dyno's. I had my ref flap actuator fail and went to the dyno (as I noted in post). Saw that the top end HP was down so tie wrapped the flap open. It was a few years later that I noticed that on that dyno that I did with res flap failed closed, my torque was higher in the mid RPM range (no idea how I happened to notice it, but I did). So I got a new actuator and headed back to dyno the next spring...
Bottom line there were mid range gains there. Pic below are the torque differences with res flap open <5.7k (orange), and closed <5.7k (blue). Had to pull off multiple dyno's so put into excel.
I am still puzzled by that original dyno. Only thing I can attribute is Hi/Lo settings of the actuator were mixed up when we were testing.
