PRP Velocity Lessons

Not a head porter, nor did I stay at a Holiday Inn Express last night but my understanding of the "Your flow bench is lying to you" refers to a couple of things.

1. Engines don't run at 28" so it's not really representative of what's going on in the engine.
2. Engines don't run "dry", see #1
3. Max flow doesn't mean Max power.

I'm sure there are more reasons, but again, I'm no expert. I sit in the corner and watch them and learn.
I think all of your statements are correct. If you test at 28", the flow bench is reporting what is going on with dry air at that pressure. Instead of "your flow bench is lying to you", we should say "your assumptions about your flow bench data may be incorrect". If the bench is calibrated, the data is correct.