HP Header Image copyright (c) 2011.

HP Twin Screw Rotors Image copyright (c) 2011. Supercharge your performance



Although originally invented in Sweden in 1939 this design has only recently been made available in sizes to suit automotive applications.
A total rethink in design and utilizing the latest extrusion, casting and manufacturing technology to provide near optimum engine efficiency.
TWIN SCREW operating principle
twin screw

Within the extruded light alloy casing there are two intermeshing rotors. The male and female rotors are helically cut and geared to run in sympathy without touching. Because of the relative movement of the two rotors the inlet gas is squeezed into a smaller space as it travels along the device, creating the increase in pressure. Because the rotors don't touch, the friction that plagues other superchargers is not present.. Friction causes heat, a heat buildup can and does undo work performed by the supercharger. A hotter, thinner charge loses power and frictional loads mean that a higher level of engine power is required to drive the supercharger with a corresponding increase in fuel consumption.

HP Autorotor See Thru Image copyright (c) 2011.