I like the idea but you would have to math things out. i don't know how many watts it takes to spin up a turbo to say 10lbs of boost, but it gets negated by the added power generated. with an alternator (assuming max efficeincy of the belt drive and that it's rated at 90amps) 90amps x 12volts = 1080 watts / 745.7 = 1.44hp required to turn it under a 90 amp load.
Can that be squeezed out of an exhaust turbine?
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