I have mine on vcontrol and a governor. I run the Vbar Neo governor .
You probably should run a governor on it or run v curves. Your v curve will need to be set at an output value that will achieve the desired head Speed . For instance lets st you want 2000 rpm and at that head you need 80% throttle. Then your v curve will be at 80 80 75 80 80.
I run a 0 25 50 75 100 pitch curve because that what the Vcontrol and Vbar neo use for all 3 IU settings.
Back when I first starting fly in my IU 1 bank would be 45 47 50 75 100. My other 2 IU banks would be 0 25 50 75 100.
Let us know what FBL unit you have and if your running a governor. For head speeds on a governor I would shoot for 1800 2000 2200 for your IU banks or if you like higher heed speeds then I would go 2000 2200 2400. Pro pilots will run around 2700 max. I use the lower set on a 12s 3000 or 3300 set up And net between 6.5 and 7.5 minutes at the 1800 head Speed. If you go to 2500 don't expect more that, maybe5 minutes of flight time.