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In The Dyno Cell

“Trust but verify.”

Mercury Racing trusts technology and believes in the accuracy of all the cutting-edge computer-driven design tools at its disposal. The computer predicts the power potential of a new engine or an updated design. But that digital prediction is verified in the real world using a dynamometer, one of the most important tools in the Mercury Racing shop.

A dynamometer, or dyno, is a tool used to simultaneously measure torque against rotation and rotational speed (rpm), which is then used to calculate horsepower. The dyno can be used to generate a map of horsepower and torque curves, either through a transient sweep through the rpm range or through discrete steady-state points. For power development, Mercury Racing relies on steady-state, point-by-point power curves where the engine is held at wide-open throttle to saturate oil, air, and water temperatures.