FULL DYNO RESULTS! SAME BOOST, AF & TIMING. WHO WINS? Roots Blower vs The World! Roots vs Twin Screw vs Centrifugal vs Turbos, same motor, same boost, same timing, same AF ratio. Who comes out on top? Factory 2003/4 4V Cobra crate motor with factory Eaton supercharger vs Kenne Bell twin screw vs Vortech centrifugal vs HP Twin turbos. It's on!