The electric turbo has been tried several times. The problem with them is finding an electric motor that will supply the required RPM (approx. 22,000) without drawing too much power. If anyone can find such a motor, I say go for it, but deffinately do your research, and it will cost more than $120 to build. AFter that, hook your motor up to a compressor housing from any turbo, and use a pressure regulator in the Intake
line to prevent the pressure from getting too high at low engine RPM or between shifts, in the same way that a blowoff valve works. Good luck, and PLEASE don't buy the Ebay crap!