All these claims of efficiency being poor or not, are all very entertaining, but perhaps the claims one way or the other could be substantiated by, oh I don't know, some actual data or links, etc.
Saying a turbocharger is 'very' inefficient or that, 'say 10%' of this power or that is recovered/lost/pulled-out-of-a-hat remains just rhetoric until figures are offered up or failing that extrapolated.
I don't suppose the TIGERS inventors have given figures on differing load efficiencies or back-pressures, but the shaft power for a standard turbo should get us some of the way there I would have thought.
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