How accurate is the ProScan dyno?
The most reliable way to dyno a vehicle is on a chassis dynamometer. It can theoretically be estimated fairly accurately using vehicle weight and acceleration data, but there are so many variables that reliability is an issue. The most reliable method within ProScan is to verify your vehicle’s transmission ratio and axle ratio and calculate the following ratio for the gear you will use in your dyno pulls: Kilometers Per Hour / Engine RPM You can then input this value into the vehicle manager settings. The drive ratio calculator will attempt to calculate this value for you, but if you have an automatic transmission, the calculator is not as reliable. As long as you can keep your car in the same gear during the pull, ProScan can reliably determine vehicle speed (in kilometers per hour) directly from engine speed (rpm). You will need to be on level ground. If you are accelerating downhill, your car will accelerate quicker and ProScan will think your car has more power than it truly does.
