[mike25]

Originally Posted by seanm@stillen

The short version:

Two main types for cars. Procharger, Vortech, Paxton all use a centrifugal type supercharger. They are very similar to a turbo, however instead of being exhaust driven, they are driven off the crankshaft. Boost pressure is linear, and follows engine RPM. The higher you rev, the more boost you make.

Positive displacement/Roots - Magnuson, Eaton , Edlebrock , etc. These use rotors/screws to compress the air. They are also driven by the crank, but the difference is they actually put out a significant amount of airflow and boost at low RPM.

The long version - http://en.wikipedia.org/wiki/Superchargers

So, what would people want for their V-6? Positive displacement, or Centrifugal? Turbo? The varieties of people, the varieties of choices, again all have to make sense when you are looking at a product like forced induction.

I have seen alot of requests for a roots style charger setup personally...the only real issue i see would be a new intake manifold of some sort, and depending on belt direction etc...maybe a couple new pieces of equipment there in addition to the standard heat exchanger and all necessary lines hoses etc. Twin screws are some of the priciest blowers on the market, but they are pretty efficient..im not sure if theres a cost effective blower out there to produce a well priced(4-5.5k) to undermine the turbo application..but its worth a look in my, as well as many others opinions.