Presuably this is a similar effect to the slot.it controllers traction control. Your mechanical "fix" limits the torque to the wheels to at or below the point at which the wheels spin , the pinion spins instead. This is in effect ABS for 1:1 cars in reverse. In ABS this that is done actively by sensors, by reducing the torque to the max before wheel spins. The slot.it controller does a similar thing by limiting the rate at which power is increased to the wheels, again keeping the torque within wheel tolerance. So the fundamental logic for youe achievement is sound. What is supprosing is that it is repeatable race to race. The setting may vary on temperature amd track grip but is a very interesting way of achieving the effects.
In theory it can be done by the driver by not squeesing the trigger so fast but that easier said than done ;-).
In theory it can be done by the driver by not squeesing the trigger so fast but that easier said than done ;-).