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Old 05-04-2010, 10:24 PM   #13 (permalink)
cujet
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A recent test of an exhaust driven turbine (on a normally aspirated engine) driving an alternator shows potential gains. Yes, there are additional pumping losses. However, with proper camshaft design (less overlap), the net result is slightly higher overall efficiency.

I don't remember the specifics, but I believe something like 4%. In other words, the weight is worth it.

I suppose this would be for a hybrid car.
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