First thanks to 91_hd for the part number for the FP guage.

Hopefully this will help someone, since I see FP questions posted a lot.
I have a Holley 670 tbi with 85pph injectors with built in AFPR.
Rest of the fuel system is stock.
The minimum fuel pressure it will allow me to run is 15psi.
The maximum is 20psi.
While the screw turns many times. The enitre 15-20 range varies(min to max) in only 1/3 of a turn.

Also from a stop if I floor it, it will drop 2-3 psi before recovering. I don't know if all tbi's do this or just ones that can consume a huge amount of fuel quickly(85pph)

 

I can tell you I do not get a drop in pressure. If indeed your pressure does recover, that might be a sign of some other problem. If pressure was simply dropping because of high consumption, the pressure should continue to drop as consumption increased.
I can't imagine it's the pump because a "bad" pump would not recover pressure as RPM built. Where are you measuring the fuel pressure? What type of gage?