TorqStorm Supercharger build advice needed
There is a big difference in the boost pressure, and CR relationship, for "positive drive" superchargers and turbochargers. Also between street drivers which spend 90 % of their time at less the full throttle, and race cars which spend most of their time at full throttle. Boats are another thing. They are usually operated at a "steady" throttle. A turbo in a street car (personal opinion) should have more CR and less boost than a race car. A turbo generally doesn't produce much boost at low rpm steady throttle conditions. It should therefore have more CR to get the car moving away from stop signs, before the boost takes over. A positive drive super charger generally has the same amount of boost available at the same rpm, regardless of throttle position, or load. So I would think you would want less CR, and more boost. (As I previously stated, I have no hands on with super chargers)