Let me explain why this "fan" is not going to work.
"FAN" aloan CANNOT create pressure (boost).
Instead, fan increases flow (velocity) of the moving air by transfering rotation energy from the fan blade to the air mass. With basic fluid dynamic theorem (Bernoulli's), faster moving fluid has lower pressure than slow moving fluid.
Hence, a "compressor" need a "diffuser" to slow down the fast moving air. With proper design, the diffuser convert the energy in fast moving air to pressure with smallest amout of loss as possible. While the pressure is built up, the molecule of air are packed closer to each other. This is how compressor pack more air into the engine.
Electric or belt driven "fan" will not increase pressure (boost) in your Intake
system, unless something obstructs the flow of the air. Since the air is moved by the vacuum inside the cylinder, the fan is pretty useless.
Here is a pic of diffuser.
It consists of straight vanes and a set of flow straightening radial vanes at the circumference. The diffuser does not rotate. The compressor blade in the middle does.