Hi John
Turnigy, Rimfire and E-Flite (probably others) have all tried rating their motors directly with glow - problem is the match-ups are all wrong.  Note that the Turnigy G32 data includes test data with 14" and 15" props - no IC ".32" on the planet could turn those props.

If you are really looking for a 32 equivalent (something that will turn a 10" prop?) consider a Turnigy 35-36, Eflite Power 15, AXI 2814, Scorpion 3014 or Arrowind 2815 - or countless others of similar size right around 4 oz.  You should also be looking for a kv somewhere between 850-950 that will run on 4 cells.

BTW the kv rating is the expected revs the motor will turn per volt input.  In practical terms the kv=770 will work well with a 5 cell pack, the kv-600 will work well with a 6 cell lipo.

Note that the Turnigy G32 data includes test data with 14" and 15" props - no IC ".32" on the planet could turn those props.

Dennis:  http://www.modelenginenews.org/sparey/five.html.  5cc, 16 inch prop.  Neener.

John:  The difference in Kv is basically the difference in how fast they'll spin at a particular voltage, or if you turn that upside down, how much voltage they'll need to spin at a certain speed.  If 850-950 RPM/volt is right for four cells, then 770 RPM/volt means you'll probably need five cells, and 600 RPM/volt means you'll probably need six (!).