For those of you like me who are reading but not fully understanding all the recent postings on superchargers, roots blowers with carburators or what !?? and waht all the argument is about. The site below gives a view from a person who has installed a lot of blowers both centifugal and roots or positive displacement. Also gives a lot of good links and opinions on various brands also mentions turbochargers too.
30 minutes on this site and you will at least know what a roots blower (Holly, Eaton, etc.) is and how it is different from a Vortek, Paxton or ATI Procharger and pros and cons of both classes.
http://home.att.net/~jroal/blowers.html#Positive
or
http://home.att.net/~jroal/
Hope I am not the only one that needs educating on this subject.