Variable drive supercharger

[Arnout]

What are the developments currently on the market for this?
I've seen two speed drives and some variable drives but none are available to the (after)market yet.
Would be nice to drive the supercharger the speed you need, and not bleed off the boost with a recirc valve

 

[stageajay]

What are you thinking, along the lines of a cvt to the supercharger?

 

[spf_lexus]

Its a great idea. Any factory cars running this tech? I would liek to take a differential and combine it with a CVT. Tall or short gears on the fly would be awesome.

 

[Arnout]

Here a two speed supercharger drive:
http://www.gizmag.com/go/6214/

Variable drive supercharger:
http://www.youtube.com/watch?v=ihdo78KsMOA&feature=related

Another variable driver:
http://www.fallbrooktech.com/accessory-drives/supercharger


This was about what I ran into when I was googling for it.