ORIGINAL: grraphal
MotoCalc (RC Software Co), has all tha data you will ever need, on motors, esc,s etc. go to their link at:
http://www.motocalc.com and go to the Data/Motor section.
Hope you find what you need. Also it's free.
As long as one realizes that Motocalc can provide a ballpark figure, but one needs to test one's own system to see exactly what is going on.