Now lets draw on our prop people. Most prop people will tell you to prop for a 1000 rpm over max torque. This avoids torque loading the drive and such.
So lets see what we have:
(502/2) * 4500 / 1728 =653.64
653.64/8= 81.7
Let's use a duration around 224 and see what we get;
224/720 = .31
81.7/.31 = 263.54 cfm
Hmmm, our Canfield 310 is 266CFM at .400 lift. We now have arrived at our "infield ballpark" duration and lift. . . .
I will continue. . .in at bit. . .
Chris