Why does COBB Tuning prefer the Mustang dyno to hub-style dynos?
The Mustang actually loads the car more closely to how the car is loaded on the road because it uses a load cell to load the vehicle based on an aerodynamic profile and vehicle weight. We test the vehicle in AWD mode because the static weight of all rollers better matches the vehicle’s actual weight, versus front or rear half of the rollers or a hub dyno. Hub dynos are convenient in that they do not take up much room, but we feel they do not duplicate road conditions as well as the load-based Mustang dyno for a few reasons. Hub dynos do not allow the car to be loaded as it is on the road. The loading of the vehicle on a Dynopak is linear because it is based on time. The run is 10, 14, 18, etc. seconds long…that is all. Very seldom is an engine’s torque curve perfectly linear. Engines make less torque until they are on boost or in their greater VE areas, and they make less torque as camshaft efficiency rolls off.
