Castle Creations motor and ESC combo recommendations for the Arrma Typhon 6s.

Monster X w/1515-2200kv - Stock gearing (14/50) on 6s = ~55MPH
Monster X 8s w/1520-1650kv - 16 pinion/50 spur on 8s = ~65MPH
Monster X 8s w/1717-1650kv - 19 pinion/50 spur on 8s = ~75MPH

Note: All speed estimates are with stock tire diameter, high quality batteries and appropriately sized battery connectors.
Always monitor ESC, motor and battery temperatures on new setups or when changing gearing or batteries.