Your right it is a "wee-bit" of a ricer question but hey...everone ask one sometimes.3

Anywho like everyone else has stated turbo no matter the setup. As long as there is a BOV mounted there will be sound. Remember BOV keeps excess pressure from building up between throttle plates and turbine. Therefore no matter the drive type. When you get off the throttle...there will be a sound. S/C can make the same sound along with the "nifty" little whine as long as there is a BOV on the car. People have a hard time concieving this because well.....they think there is no way a S/C car can have a BOV. Becuase they forget it's operation for some reason.