Quote:
Originally Posted by niky
Doesn't matter how fast they spin. It's how much positive pressure they can generate. Thomas Knight's motors had a 15 hp draw. That's about what it would take to make positive pressure on a modest four-banger. (Indeed, their dynos showed that boost petered out at higher rpms on the 2.4 liter Altima they used as a test car.
5-7 kW might just cut it... probably enough to give your Jeep around... 5-6 psi of boost...  ...the question is how much weight in capacitors or batteries you're willing to carry around? 
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yes it does, force= mass * velocity
mr. knights device was powered by 1 or 2 extra batteries required to power the 3 starter motors; and i think in the end the car was hauling around 200lbs more then it would have with a normal m62 or m90, completely making 5-6lbs of boost, negated by the additional weight.
ps. 15hp=12kW