If electric super chargers actually worked......well they don't. You cannot even come close to the necessary volume of air required with a simple fan. Without getting into exact numbers, an basic small block engine can easily pump through 600cfm. A really powerful high volume 4" computer fan can deliver ~50cfm. The reality is; even at idle, the air demand of the engine is greater than the fan can produce.
Now....if it had a 50HP motor and turbo veins and turned at 30,000 rpm.....that's different story.....but I think ProCharger already has that available.....but it's a few bucks more than the $225 for the electric.