Thanx for the feedback. This engine was dynoed at 615HP when built, but since I'm still tuning, I don't think I'm up in that range at this point.
And the strange thing to me is that it starts losing pressure at lower RPM. I'm down 2PSI at 3500 RPM when I did the 1-2 shift, and 3PSI at 4000.
I'm going to need someone with more engineering knowledge about the flow requirements than I have off-hand to help determine if I need a bigger pump.
I'll try to Google it later, but I would be surprised if I'm losing pressure due to lack of flow that early in the engine speed scale.
I'll see if I can add the injector flow rate to the chart. Maybe that will signal something to me as well...