This calculator works out the overdrive percent that a lyscholm (screw) supercharger will have to run to achieve a horsepower target.

supercharger sizesize of supercharger, in Liters
horsepower requiredflywheel horsepower required
max engine rpmthe maximum rpm that the engine will operate at
required supercharger speedthe supercharger speed to achieve the required horsepower
supercharger overdrivethe percentage of overdrive that the supercharger will have to run
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