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Okay I actually built one for craps and giggles for my silverado. Keep in mind i was in high school and completely bored. I used the compression fan from a model aircraft jet engine. While it did absuolutely nothing but make noise, there was somthing crazy-cool about doing it. (it came off after a week of insanity) The Home made CAI box stayed however....and yes that is dryer ducting.
Anyone have a hair dryer and some duct tape? Ha, would make for an interesting picture and deliver the same amount of power as this thing-- ZERO.
So lets see the hair dryer electric supercharger!!
One could even claim it preheats the air as to get a better air fuel mixture (I know a bunch of BS).....
If we run a 5.7 liter engine at 6000 rpm, that's 600cfm if my math's right:
5.7 liter x (6000rpm /2) x 1cf/28.3 liter = 604cfm.
6000/2 is for four cycle..... only pulls air every other rotation, right?
This thing is stated to be rated at 500cfm. So, at full speed, this thing would seem to just be a restriction in your intake....
Flow isn't the only thing you'd have to worry about. It's the compression that makes forced induction work. The power required to compress air is significant. While and electric supercharger could work if you took a mechanical one and hooked up a high capacity electric motor to it, the electronics involved to keep it in sync with the engine and fuel system would make the unit significantly more expensive.
Air pressure at seea level is 14.7. If I've done the math correct, 6 psi (pretty conservative boost) on the engine mentioned above would generate a a boost of roughly 41%. This equates to a required flow of 846cfm in with the power to also compress the air in addition to moving it.