All across America, in unassuming garages, shops, and industrial parks, small tuning shops and engine builders are creating massive horsepower with some simple tools. But in order to properly tune the cars and engines that come into their shop, they need more than just wrenches and wingnuts. They need dynamometers, or dynos, to test both flywheel and wheel horsepower, because otherwise what would you have to brag about?

The SuperFlow Corporation is a leader in both car and engine dyno technology, and they produce some of the sturdiest products in the business. Superflow recently released this video of their SF-902S engine dyno in action.

The low-inertia design of the SF-902S makes it perfect for testing small, high-revving motors like those belonging to ATVs and motorcycles. It can handle a rotating capacity of up to 15,000 RPMs, and the stainless steel components are designed to take up to 1,500 horsepower and 1,200 ft-lbs of torque. There aren’t many motors that put down more power than that.

The SuperFlow SF-902S comes with the latest in operator controls and the WynData data software, allowing the operator to measure and test many different dynamics. The SF-902S is designed for prolonged, high-RPM testing, like what circle track racers regularly put their motors through, and for shops that regularly build high-revving engines, its pretty much a must-have tool.