I decided to once again upgrade my motor on my electronic monster truck. The maximum upgrade people seem to recommend for a truck of thistype is a 12 turn with x2. the x2 gives it a little more torque to make up for the torque lost by using a lower turn motor. In order to use this I also had to replace the stock speed controller with one that would support a 12t motor.
The motor is an LRP v10 spec5 12×2 and I am using a Modelsport Sniper RV-12 ESC.
They seem to give the truck a nice boost compared to the small gain received by upgrading it with a tamiya motor.