Set the brake at 100%, make sure your TX is also set to 100% and then regulate the brake on the stick.
The amount of brake you get will depend on the motor you run, the ratio you run and the speed the car is doing when you haul on the anchors. As the car is heavy and the motor is probably carrying timing, don't expect it to have a lot of brakes.
If you are using brakes in GT12 you will be slow around the lap - they are not required in the pan classes unless you race 12th Modified. HTH
