2 speed supercharger?

YourHondaSux

I like Supras
Aug 12, 2005
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Panther Country
www.cardomain.com
http://www.worldcarfans.com/tuners..../antonov-unveils-first-two-speed-supercharger

Anyone else read about this? I don't really understand the benefit of a 2 speed supercharger. The article says that the charger operates at a higher speed during low RPM's and a slower speed at high RPM's. The only benefit I can imagine for that setup(as opposed to operating at full-speed throughout the RPM range) is fuel economy at higher RPM's. But if you're supercharging your ride, most likely gas-mileage isn't your main concern. Perhaps its intended more for rides that come from the factory sc'd? What do you guys think?