ok so does anyone think I'm undergeared at 12/42 running 2200kv Castle motor on 4S? Was discussing this on another forum and was told "undergeared will take the motor out if its efficiency range, cause heat possibly, and diminish run time"

I have a 13 tooth pinion available to try in it. Guess I'll give it a shot and see what that does. Not entirely sure what speed to gear for. At the last big race the A Main Pro buggy winner averaged 19.5 mph over a 30 min main (nitro). This is the only track I've ever run on so I don't know if it's a "fast" track or not. With 12/42 my theoretical top speed is like 30 mph. Maybe it's undergeared?

Differential Ratio: 4.3
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 42
Pinion Tooth Count: 12
Total Voltage: 14.8
Motor KV: 2200
Tire Diameter (inches): 4.5
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor Coil Resistance: 0
Spur/Pinion Ratio: 3.5 : 1
Total Ratio: 15.05 : 1
Tire Circumference (inches): 14.14 inches (359.08 mm)
Rollout: 0.94:1
Total Motor Speed: 32560 RPM
Vehicle Speed: 28.96 mph (46.52 km/h)
Effective KV Value: 2200
KT constant: 0.61 oz-in/A
Motor Torque: Amperage not specified...
Final Torque: Amperage not specified...
Final Power: Amperage not specified...


Just looking for some insight.

Thanks.