928 Motorsports - Porsche® 928 Performance Parts - Good Used Powerdyne XB-1a-R (reverse rotation) with Impeller Upgrade - Porsche® 928 World record Holder 216.63537 mph

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Good Used Powerdyne XB-1a-R (reverse rotation) with Impeller Upgrade

Background: The Powerdyne XB-1a was designed to fit into the same brackets as the BD-11 series blowers, but replaces the internal belt drive with straight-cut gears.

XB-1a-R Hybrid: This supercharger is a reverse-rotation unit, designed to spin CCW (most XB-1a units are CW rotation). This supercharger is also fitted with the 928 Motorsports Billet Impeller and larger volute, which increases its output by another 20% from the stock XB-1a. This is a $540 upgrade. US Patent Number D554,150 S

History: This particular supercharger was used in 2009 at the Pikes Peak International Hillclimb where it won 3rd place in the Open Division. Photos shown as it is installed on that engine provided for examples of how you might want to install it on your car. Note the air inlet is at the front, the pulley and belt are at the back (Like a Vortech would be)