Dyno figures are much less important than reliability, in my opinion. The Kraftwerks superchargers seem to dyno high, but are constantly having issues...

 

I have the kraftwerks kit, no issues to speak of, I think it's all about the install and knowing the quirks like loctite and proper belt tension, etc.

 

And you track the car?

 

yes

 

 

I think the roots style superchargers are awesome, but they have been out of production for a long time, so if anything goes wrong fixing it won't be easy. Also not many of these were made, so not much info is out there on how they hold up long term.

 

There is a guy selling a complete SOT kit on facebook right now if you can find it. I always felt it was the best kit, wished they kept refining and developing it...who knows where it would be at this stage.

 

 

Reliability out of the box.

 

Although its a neat concept, and provides a better trq curve over the typical centrifugal sc, it wouldn't be my first choice for best chance at a fuss free reliable track option, not too mention the added heat this kit will be producing reaching 350whp which is the top range for what it can yield. Nothing beats the reliability of a Paxton supercharger and coupled with a well designed kit such as SOS, it is a no brainer best option street or track for reliability. You can run a modest 9-10psi and make 350whp, along with their upgraded larger racing heat exchanger and a recommended oil cooler, be well within reliable track performance.