Still working on your answer. lol
The 2.0 L engine size problem is that even at a needed 4 hp to 6 hp the 2.0L engine would have to be running in vacuum and could not utilize the turbos
FE efficiency at this very light load. On my car I have to overcome AWD drive train loss and with a Cd of .29 so the hp that is needed is around 10 hp @ 55 mph.
So in your case the turbo could help with extra power when needed if you choose to run a 3 valve setup.
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Pressure Gradient Force
The Positive Side of the Number Line
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