hello guys
the only car the I heard a super charger from is the 2014 HSV GTS only!! GT500,zr1,zo6,hellcat, sound realy ugly without super charger sound 
the 2014 HSV GTS you can really heard it very clearly and this is not fair at all hope to fix it.
Upgrade supercharger= supercharger whine and more power 
Not so, there are a few cars with S/Cs which are inaudible.
For example, the '98 Aston Vantage V600 (Twin superchargers) cannot be heard stock or upgraded which totally ruins the character of the car.
agreed