Gearbox Testing Update!

Black Can Heng Long High RPM Motors and Freshly broken in Gearboxes with White Lithium Grease for lubricant. Motors and gearboxes were broken in with toothpaste for 2 hours running directly off 7.2v battery. Then 30 minutes submerged in the sink while running to clean them up and break in the motors as someone mentioned on here awhile ago.

Black Capped Motor in High Mount Metal Gearbox turning Tiger Sprocket hooked directly to battery:
.32A 7.41V 2.3W @ 386RPMs

Black Capped Motor in Low Mount Metal Gearbox turning Tiger Sprocket hooked directly to battery:
.28A 7.36V 2.0W @ 386RPMs

Graupner Speed400 in High Mount Gearbox (same as first test)
.40A 7.36V 2.9W @ 390RPMs


Have a question for you motor experts. Don't know how to measure torque, I remember that the Speed400s when installed in a Pershing was 2.5 times faster then my fastest tank at the Time, a black capped, plastic track/gearbox Panther. The Pershing smoked it! The Pershing weighed nearly twice as much and has a smaller sprocket. These tests are run with no load. Can we logically deduce that the even though the Black Capped Suntechs and Speed400s performed nearly the same in a no load situation that the Speed400 would be superior in a loaded one or is there a way to test?