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Yea the temperature is lower after the throttle plate, but if you took a volume of gas and adiabatically expanded its volume via a piston, the temperature would be even lower. The heat addition just doesn't "make up" for the expansion effects, but there is a heat addition.
drmiller, let's do a real world data comparison. I've seen 60% claimed fuel consumption decrease from variable intake duration systems...I think that matches the <1hp estimate pretty well.
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