No fan at any velocity can produce boost. Only a compressor wheel can do that. Notice a turbos compressure wheel is fully encased and not just shooting into the intake stream. It has to take and compress the incomming air then shoot it out, a "fan" can not do this.
Also in a 12 Volt system there really just ins't enough electrical power to compress air. Once cars switch over to 48 volts in a decade or so then it may be more possible. But for know you will waste more power by spinning a larger alternator then you can by the 1 PSI of boost an electric compressor can make.
Also in a 12 Volt system there really just ins't enough electrical power to compress air. Once cars switch over to 48 volts in a decade or so then it may be more possible. But for know you will waste more power by spinning a larger alternator then you can by the 1 PSI of boost an electric compressor can make.