Anyone know what manufactuer of Blowers makes A blower or Centrifical Supercharger for a Counter Rotating Engine??????

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I am not much on centrifical superchargers but I am sure procharger or paxton could tell you if you called them. I run a littlefield roots blower and although I have never tried it I would think you could swap the rotors and rotate drive housing to drive off the other side thus reversing rotation. Call Marv at The Blower Shop or Mooneyham or Littlefield blowers I am sure they can tell you exactly what is involved and cost to change. I don't see why it couldn't be done.

yeah, you should be able to swap the drive to the other side of a roots blower. The GM blowers have a drive snout that bolts to the rotor gear and you could just keep the same rotors in the case just like they are. Some of the aftermarket blowers have a physically lonnger shaft on the driven rotor - those will need swapped in the blower case and the drive shout housing flipped over.

Vortec, I believe, makes a reverse rotation impeller for some of their centrifugal pumps - other mfrs might as well - worth a call to them.