The compressor wheel design is awfully crude. The 90° transition in the compressor is downright lousy. They quote a whopping 1.5PSI of boost, with no flow rate specified. www.microboost.com.au That's ten percent more air and theoretically HP, minus the shaft power required to turn it. You can get far more than 10% with standard modifications.

Let's see a compressor map, or dyno!