parachute quickness/ finishline activation/engine braking

The primary reason we dump air pressure in the Lencodrive or any converter drive is to keep it from trying to wipe the bottom rod bearing. Especially in quarter mile applications, there is usually not much oil left in the sump or in the tank, so if you allow it to engine brake on decel, it can wipe or worse spin the rod bearing due to decel load and lack of oiling. Parachute hitting and sending the oil to the front of the pan or tank doesn't help. Clutch cars simply push the clutch in to de-couple it, converter cars down shift to make it over run the converter sprag.