On there website it says that they use the dastek dyno This is what they say about it mate. Our Dynamometer uses sophisticated digital processors which give exceptional speed control. Unlike other dynamometers which use ABS-type pickups (at 100 signals per revolution), the Dastek Dyno gives us 500 digital pulses per revolution and also gives us temprature compensated load cells. This gives us consistently accurate results regardless of ambient temprature or how hard we push the dyno. Our Dyno is suitable for 2WD and 4WD cars. To accomodate the latest generation of 4WD cards with electronic control, our dyno has a highly sophisticated front to rear speed control strategy. All resuts on dyno can be stored on a database. This allows quick reference to previous dyno runs and allows us to track improvements over several visits or phases of engine development. Craig