Background: The Impeller inside your Powerdyne is typical of superchargers designed about 20 years ago. Straight vanes, some curl at the inlet (top), and manufactured from a casting. The vanes cannot be curled much more than they are, or the impeller will not release from the mold when it is cast.
Today’s Impeller: With advances in 5-axis CNC milling, these impellers can now be cut from a single aluminum billet. This allows us to use higher-strength alloys, and machine it to closer tolerances. We cut in tighter inlet curls and progressive vanes that were computer-designed for optimum flow inside the Powerdyne casing. Each impeller is spin balanced to 0.006 grams/inch, and designed to spin up to 60,000 rpm. This alone is a big help in making bearings last longer. This Impeller has been more than a year in development and testing, and so unique that we have a Patent Pending on it.
Balanced and Ready to Run: All of our impellers are balanced to 0.006 grams/inch at 60,000 rpm. That’s a very high standard that most manufacturers do not achieve. In addition, we have performed over-speed tests on our 60,000 rpm impellers to 72,000 rpm (a 20% safety margin for you) without damage. You can rest assured that your new impeller from 928 Motorsports will arrive ready to install right out of the box!
On-car and on-bench testing reveals that our impeller moves about 20% more air at the same RPM as the original one, and at about 20% greater PSI
Simple Installation: You can change-out your impeller by removing the scroll and one nut on the end of the impeller shaft. Slide the old impeller out, slide ours on. We designed it specifically to fit within the Powerdyne casing without and modifications, so it is just that easy. IF YOUR POWERDYNE HAS A TRIANGULAR CENTER SHAFT, we have a new impeller shaft available to update your Powerdyne so you can use this impeller.