I know that they call it a supercharger because it's belt driven. I talked to the guys that designed it and it is based on a turbocharger design. It is not a Roots style blower which is also belt driven. They use a turbocharger compressor design but don't need the turbine side because it's belt driven. The belt drive gives it boost without the spool the exhaust driven turbo's put out. Exhaust driven turbos are hard to control and were designed for diesels and a more constant rpm. Also it's the heat that drives the turbo and not the exhaust flow. If you think about all forced induction could be called superchargers but not are all turbochargers. That was my point.