Quote:
Originally Posted by legion
I was thinking about my truck's engine. It is a V8 that shuts down 4 cylinders to conserve gas.
See where I'm going here?
.... An engine that can run as a V8 or supercharged V4.
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Others have already pointed out some of the inefficiencies; I'll add that when you are down to operating on 4 cylinders, you are doing so because you don't need extra power.
Supercharging a motor has more to do with "getting more power" than it does with getting more "efficiency" out of the motor.
When your truck's motor is running on 4 cylinders, supercharging those 4 cylinders won't really increase efficiency -- and since you don't need the extra power -- why do it?