Oh i understand how expencive that is, Its just a concept, I have been working on it for about a year now, and now is the first time I found anyone that actualy knows what I am talking about.

I finished it the day I posted (Bumpidy), it works, it costed me 340$ that is just to make the compressor section, The tip clearances were not a problem, the first 2 stages I used plastic computer fans, and wasnt very worried about clearances, for the main compressor section I went to a airfield junkyard and found the smallest APU I could find, the rated RPM on the APU I used was 37,000, I took out the compressor section, the guy charged me 150$ for it...I used a vacuum motor to drive it, and to test how much PSI I could get out of it, I still havent tested the operation at the different RMP ranges, all I know is that it puts out a constant 4 PSI at 4000 RPM and 6 PSI at 7800 RPM, I need to find a way to control the output without blowing it up or puting too much backpresure on the blades, because the motor I am testing with is almost toast, it wants to spin faster, but I havent goten that far yet.... Everything is in perfect balance and does not even shimmy when I had it at 7800 RPM, I work at Flex-a-Lite (cooling company) and used there balancing machine befor I hooked the motor up to it, it spun it at 10,000 RPM for 20 minuites and it was all fine, very warm, but fine...I was checking out electrical superchargers on the internet, and they dont put out 1/2 as much boost as mine does? I am guessing its just a different design? Also the ones on the internet spin at 24,000 RPM ! I am currently working on welding together a bracket and geting together a gear ratio that will spin this thing to make a constant RPM while the engine is makeing a different RPM= so it pushes a constant PSI, not 2-9 PSI.

I have also been working on a one way air valve for the intake system, that way I can hook it up to the stock/aftermarket intake tube that way when its not in use, or if the engine needs more air than the charger can push it will breath through the stock intake and filter.... So far all I have is what resembels a big air valve for a blow up beach ball, just like a door with a spring. I will post the results when I hook it to my car (after I fab up some brackets to mount it to the belt) I am also using some crappy roller skate bearings for the shaft to mount to the bracket, if you have any ideas on somthing beter let me know.... Because I have a feeling they were not ment to spin at over 4000 RPM..... My design has 4 stages of compression, its 16" long and 8" in diameter. It would fit perfectly below the Intake manifold with some small modifications to the brake lines and other fluid lines.... As far as cooling, I havent goten that far yet, I am thinking about making a high flow air Cooler at work, somthing that can handle high pressure....

Please give me your opinions.