Originally posted by Aku-Man
Can the car drive without any tensioner? I tried it on hpi rs4 pro 2 before, the car just spin 360 degrees. Belt will have great amount of extension under acceleration without tensioner, which will lose some power transfer to wheels. I haven't tried it on my 414 without any tensioner. I use tensioner just to make the belt stable under acceleration and deceleration not to tighten the belt. That is my point of view.
I use NO tensioner on MY Xray or TA04R with no problems. There is no loss of power to the wheels trust me. The only time there would be loss of power would be if the belt is skipping due to a worn and stretched belt.
If you ask other racers I am sure they will agree. This point has come up in the TA04R thread and most say they don't use the tensioner.