Hi Bob,
Well yes ... but this presupposes that you are going to prop and set the RPM in the right neighborhood. How comfortable are you with e-power in the first place? Upping the voltage 25% can have a dramatic effect (way more than 25%) on the current draw, depending upon a whole pile of factors including the motor specs.
Let me suggest this: gather the 3 important specs for your motor (Kv in RPM/V, Ri in milli-ohms, and Io or the no load current) and go to the Aveox website. Under UAV propulsion (hey that's us!) find the virtual testbench.
Now let's make some assumptions: Let's say you have a ~ 4 A-H battery. That means to fly comfortably, but with as much power as practical, for ~ 6 minutes you will prop to 30 A. That drains about 3/4 of the battery capacity. Put your motor constants in, and you will have to guess at the number of nickel cells that equate to 4 lithium. Depending on the current, it will work out to about 14 cells. The Aveox virtual testbench accepts fractions of cells (e.g. 14.7 cells). We all seem to fly within a few percent of 55MPH, so work out a prop diameter and pitch that draws 30A and flies at 55 MPH at the correct motor voltage (about 14.4 for 4S) . Feel free to use oddball pitches like 4.35 and non-ieven inch diameters. Note the diameter, RPM, and pitch.
Now add 10 or 20% in pitch, to get the prop you will really use. (find the next standard pitch up, or two) Then take that % increase in pitch and take the same percentage off the RPM the simulator showed, and set the Governor to that RPM. That will keep 55 MPH. The average current draw should be very close to 30A. With the higher pitch put into the sim, it will show the maximum current BUMP you could possibly get from the ESC in a vertical climb. You may not get that much because the ESC will only do what it has to to maintain RPM, but you can see how much "headroom" is available for grunting through high drag and climbs.
The governor is not the same as throttling back: your controller came in normal throttle mode, and you will have to change it to heli-governor mode.
I hope I helped, but yell if I just made a mess.
Dean Pappas