Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB - View Single Post - Jackson Racing Rotrex Supercharger System Info and Discussion

mad_sb · 01-14-2014, 08:04 PM

So, i was under the impression that the benefit of a rotrex unit would be that you could spin up the compressor earlier than with say a Vortech to get boost down low and then limit the boost up top by using inlet restrictors.... I'm not seeing that in this application though... it seems the rotrex units are not making any more boost down low than the vortech units.... this is based on the dyno plots (power output) i have seen, not actual boost plots...

Is it possible that with a larger impeller and a smaller inlet we could get the best of both worlds with more boost and torque down low without "over" boosting up top?

I am asking as a prospective customer of one of the rotrex kits, not as a fanboi of one of the other options.

01-14-2014, 08:04 PM	#266
mad_sb Senior Member Join Date: Jan 2013 Drives: 2013 Asphalt FR-S Location: Orange County Posts: 1,639 Thanks: 632 Thanked 982 Times in 537 Posts Mentioned: 100 Post(s) Tagged: 0 Thread(s)	So, i was under the impression that the benefit of a rotrex unit would be that you could spin up the compressor earlier than with say a Vortech to get boost down low and then limit the boost up top by using inlet restrictors.... I'm not seeing that in this application though... it seems the rotrex units are not making any more boost down low than the vortech units.... this is based on the dyno plots (power output) i have seen, not actual boost plots... Is it possible that with a larger impeller and a smaller inlet we could get the best of both worlds with more boost and torque down low without "over" boosting up top? I am asking as a prospective customer of one of the rotrex kits, not as a fanboi of one of the other options. __________________ ~Namaste~ 2013 Asphalt FRS Last edited by mad_sb; 01-14-2014 at 08:26 PM.