Contour Enthusiasts Group Archives Forums Modifications Forced Induction Convert a turbo to a supercharger?

Well yeah, that's what a vortech is essentially.

Or the old Paxton ones, or the pro-chargers.

I'd guess that it would not be impossible for the DIY'r but probably unobtainable for most people.

Aside from that, you are back to the point that it is the wasted exhaust energy that spins the turbo so it is very efficient whereas the supercharger uses engine power to do it.
On top of that the centrifugal compressor types don't make good power until the engine rev's are up there.