I just thought this was interesting and maybe a repost, but Psi-Fi took a supercharged mini cooper and then twin turboed it. Now I gotta admit, that's badass:
http://******************/showthread.php?t=432
Sounds like fun and costly, but fun none the less.

Yes Psi-Fi has pointed out its twin charging system, sick video tho! Imagine that thing under the hoods of our brand new Cobalts :-D

heard lots of talk but thanks for the vid. Instant power from the SC, then the turbo spools up and wow... that BOV sounds like a cracking wip. i want to see a vid of that in a Redline, he's working on it now .. i can't wait to see numbers.