Hi guys, anyone thats running a 901 superflow with a aftermarket system such as YourDyno etc, there is a calibration issue i have found with the factory calibration arm, whilst it is 36inches (3 Feet) long from brake shaft to weight hanging point, you must take off 6inches of the arm length calculation as the load cell is 6inches away from the center of the brake, so it is 30inches (2.4 Feet) for arm value instead, otherwise your HP/TQ readings will be too high, so your weight should show 2.4 times the calibration weight on the end of the arm (not 3 times the weight) this will show on the screen in load cell settings