Step testing allows you to test bolt-on components or a complete valve train at avarious engine speeds. With the step testing software, the SPINTRON spins the engine at each RPM you've entered in the set-up screen. It records and graphs data from a variety of sensors at each speed, then moves on to the next set of RPM. This is an excellent way to test oil pumps, because you can record vacuum, flow, pressure and horsepower required at each step. It's equally effective for determining optimum performance for power-steering pumps, fuel pumps, timing sets and other components. You can run these tests at speeds from 500 to 20,000 RPM.