It would be interesting to see the SuperFlow graph with the various correction factors/filters applied. The CF utilized on your graph is definitely the heartbreaker one. I have graphs from them in both "WhlPwr/WhlTrq" and "SAE HP/SAE TQ" both of which are much closer to Dynojet numbers (comparing the same car/setup), i.e., SuperFlow "SAE HP/SAE TQ" of 529.5/476.8 compared to 546.4/487.1 on a Dynojet using STD correction, Smoothing 5. Nice numbers on CES's dyno! They're a good group and I'm excited to see how they progress with their shop car. RE: 15:1 AFR at WOT --- that's definitely much leaner than norm even for a DI car; however.... getting an accurate AFR reading at the tips through cats and a stock exhaust, particularly one with valves can be problematic, in my experience. It's very possible the sensor is not getting an accurate reading due to positioning, etc..