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Originally Posted by serialk11r
That's true, although I think that matters more for improving torque at different points in the rpm range than emissions and whatever. Set up the ports for very little overlap, set up intake for high rpm power, low rpm VE goes down and fuel economy goes up. Of course, this is given that they can figure out the rest of the problems first.
Now the little overlap is bad for power, but one of those electric turbo systems could nicely take care of the problem and give efficiency improvements, albeit at higher cost. But we're talking >400hp anyways :P
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They've mentioned the rotary in the context of the generator engine in a Volt-type hybrid in the past as well. This may be more realistic.
They are un-nervingly smooth, and can probably be tuned to be very efficient at a narrow rpm, and just spin there until the battery's charged.