turbocharged

So I've been busy the past two days and acquired 2 more Vmax's and an 83 Venture Royale. I have an itch to build a turbo venture. Here are the details/goals I've brainstormed. Discreet appearance: Would like to retain stock bags and plastics and hide turbo/intercooler behind the fairings...

Why does there need to be an intercooler if it is supercharged, it must be turbocharged as well? Why? http://jpx.responsejp.com/jpx/images/2004/04/02/59155_1.jpg?fit=normal

http://www.youtube.com/watch?v=FWb3ObGWkdY&feature=player_embedded