lpbman said:
I know I'm hijacking, but the idea is that these bikes are cheap, and no one wants to spend a 1500+ dollars for a proper turbo... but if you could get 2-3 psi out of a 150 dollar "axial flow compressor" then you might have something.
The pressure rise will be a heck of a lot less than 3 psi, more like 0.3 psi if you're lucky..............
I've just done some quick calculations. This fan delivers around 0.58 psi when running in free stream with no obstructions. As soon as you start to obstruct the flow with an intake that is smaller than the fan diameter of 90mm the pressure will drop as the fan flow conditions change and the mass flow rate drops, so I think I was being optimistic with my 0.3 psi guess above. If you have an intake diameter of, say, 40mm (pretty big for a small bike), then you will be obstructing around 80% of the fan. My guess is that this will cause partial or full stall and the pressure will drop to maybe 0.1 psi if you're lucky.