Dynamometers, or just dynos as they are better known, have become invaluable tools for testing and tuning engines and the cars they power. There are many different methods for dyno testing, from rolling chassis dynos to engine dynos. And as with everything in the automotive industry, there is plenty of debate surrounding the best methods for measuring power.

Luckily for us, AEM has introduced its new Dyno-Shaft Dynamometer, which is literally a mobile dyno system hooked up directly to your car, providing incredibly accurate horsepower and torque outputs.

For this video, AEM put a 1970 Chevy Nova on the standard chassis dyno. Powered by a 408 cubic-inch small-block Chevy engine, this ol’ Nova is the perfect testbed for AEM’s new Dyno-Shaft dynamometer. The AEM Dyno-Shaft Dynamometer uses a specially-designed yoke for your vehicle’s driveshaft, providing accurate measurements of power and torque at the driveline, unlike some dyno setups which use “estimations” to guess your power.

The Dyno-Shaft dynamometer provides plenty of obvious benefits for amateur enthusiasts and serious racers alike. By being able to accurately measure horsepower on the fly, while driving, and not be restricted to a garage dyno setup, you can get a better idea of what your car is going through under real world conditions.