Hey John,
Just some more peanuts for you to chew on in your dreams, but Detroit Diesel used a turbo to pressurize the supercharger on several of their 2-stroke engines. Those things were big truck motors, sure, but there are always pictures that I come across of guys that try a similar approach to make huge power, i.e. multiple compressors of whatever type in series (one after the other).
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David
newbie #4153