[Bondonutz]

The 1518 would be a great choice, IMO the 1717 is too heavy for any kind of race application especially when running 4s. The 1518 is still more than you'll need but will def run cool and be plenty powerful, you'll just need to gear up a bit more to get the speed you want.

Just guessing the spur tooth count at 45

Differential Ratio: 4.3
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 45
Pinion Tooth Count: 20
Total Voltage: 14.80
Motor KV: 1800
Tire Diameter (inches): 4.5
Tire Ballooning (inches): .10
Motor Current Draw: 0
Motor Coil Resistance: 0
Spur/Pinion Ratio: 2.25 : 1
Total Ratio: 9.675 : 1
Tire Circumference (inches): 14.77 inches (375.04 mm)
Rollout: 1.53:1
Total Motor Speed: 26640 RPM
Vehicle Speed: 38.5 mph (61.85 km/h)
Effective KV Value: 1800
KT constant: 0.75 oz-in/A
Motor Torque: Amperage not specified...
Final Torque: Amperage not specified...
Final Power: Amperage not specified...