Thank you, Dave. From what I know about the NBO2, it looks like it's working normally by watching the monitor. Pretty regular swings from 100 to 900 mV. It does plateau low or high for a few seconds at times, but then starts swinging again. I'm going to bump up flow rate to 82 lbs and see what happens.
As for SA, I also plotted that on the monitor and it looks more normal there. Previously I was just watching it on the analog gauge in TP dashboard. At the end of the drive I let it idle for several minutes in closed loop and the SA stayed pretty close to 17-18, with swings of a degree or two either way, but very consistent. It did bounce around quite a bit more if I rev'd it, but I think that's expected. I also noticed that SA was very large (40-41) on cold start up and linearly decreased as engine warmed. Weird?
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