I thought a supercharger was banned regardless of how much power it makes. I was reading it then, it leads me to believe i could have a supercharged VT calais (still on green Ps) because its a family car, not a performance vehicle, and that the power to weight would be lower.
And i would have thought the engine wouldn't get damaged not running the supercharger if it was a s/c engine, but that it wouldnt run efficiently therefore making it a bad decision to have it off.