[brian015]

I'm planning to do a similar on-road buggy conversion. Plugging the numbers in the calculator (I had to guess on tire diameter because I don't have any - but assumed they'd be a little smaller than my off-road buggy tires) made me realize that I should pick up a CC 2650kv motor (instead of the 1800kv I use in my off-road buggies). I'm going to run standard 43/13 buggy diffs and 46t spur on 4s. This should give me good gearing options from 40-50mph.

For example:
Differential Ratio: 3.3076923076923075
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 46
Pinion Tooth Count: 15
Total Voltage: 14.8
Motor KV: 2650
Tire Diameter (inches): 3.7
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor Coil Resistance: 0.0035
Spur/Pinion Ratio: 3.07 : 1
Total Ratio: 10.14359 : 1
Tire Circumference (inches): 11.62 inches (295.25 mm)
Rollout: 1.15:1
Total Motor Speed: 39220 RPM
Vehicle Speed: 42.56 mph (68.37 km/h)
Effective KV Value: 2650
KT constant: 0.51 oz-in/A
Motor Torque: Amperage not specified...
Final Torque: Amperage not specified...
Final Power: Amperage not specified...