Agree with all thats been posted above
Despite a few people having Rotrex superchargeres fitted its still unproven in my book, sorry if this offends people but fact is go look at the USA where Jackson superchargers have been used widley, also the Comptech ones.
The Rotrex is still and im sure richard at TTS would agree with me here a development kit, much like the JR was when G had his fitted, the Jackson charger has undegone much development to get it where it is today.
Ok you can argue that its not the most effiecient charger out there and generates a lot of heat at highboost lvls but as others have stated who would want to drive a car with more that 250-300 BHP through the Front Wheels no ta Ill leave the 400-500 BHP for the 4WD boys.
Ok there is applications for 400-500 FWD but thats mainly Drag Racing applications, using a Turbo, at least with a Turbo you can turn the boost down and use it as adaily driver................
As for the Dan Ferret Rotrex supercharger and the claimed 450-500 BHP he has or has not had etc etc, It would appear that the car is currently undergoing a rebuild !! I wonder what that tells you
Ohh and its still very much unproven as I have not seen the car at any shows meets track days drag strips the list goes on, all I have heard is the pub talk 500 BHP figures.
Im not trying to start an argument here im just stating facts