The reason for the dyno visit again was to see how it looked with the uhhhh "octane booster" added. Unfortunately I consider it inconclusive because it didn't produce clean runs. I need to run it on a different dyno across town and compare them. Not really for HP/TQ numbers, but to see if the curve returns to being more linear.
(Dotted line is the original baseline run)
The two dynos are both Mustang AWDs and they are real close in numbers when I've compared in the past. If I re-run it on the other dyno and it's still showing that kind of curve then it's probably that "octane booster" doing it. If it comes out pretty normal then that was just a funky set of runs.