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I always wondered how can a electrical supercharger be really efficient.
Starting from the fact that if you take power from the stock alternator you won't have enough boost to note any difference, I'm guessing such a system should include a different power source (a battery pack).
The charge should be anough to use the compressor a few times, like a "boost button".
But isn't it just a less efficient version of a electric KERS?
After all the KERS transfer power directly to the wheels or gearbox, a much more direct route.
Are there any calculation of the kind of power you can get and for how much time, based on a reasonably sized battery pack that can fit in the car?
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