Leawood911:

But Mike sounds like he is on the correct track.  Some type of hybrid Turbo 

Maybe an electric super/turbo-charger unit whose output plumbing is merged with and supplements the exhaust-driven turbos?  Keeps the exhaust heat from conducting into the electric stuff?

I still like the idea of electric spool-up assist via common impeller/compressor/electric-motor shaft, but recognize that shaft conduction of exhaust heat is a problem that might take exotic remedies.


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Mike

918 Spyder + 991 GT3 RS +Tesla Roadster 1.5 & Model S + Panamera Turbo +  BMW Z8 + BMW 3.0 CSi + Bentley Arnage T