Using the TVS1320 is definitely good for people wanting to make more power. The issue though is for people looking to stay under say 300WHP you may be spinning the blower under its main efficiency range while dealing with more parasitic loss. The Cosworth TVS900 may be a better fit, all depends what you are after. More options is always better though.
I've posted this before but this is a dyno from KSR's TRD supercharger, which also used the TVS1320, almost identical in design to the Harrop. This is about 13PSI on 98 octane, 9.5:1 CR motor. I'll be interested to see what Harrop is getting out of them.
