Twin serial turbos

[steveb@newkla.kla.com (Steven Buchholz)]

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I read an article in a swedish car mag a couple of years ago about a
Volvo 245 that a turbo shop in Gothenburg had put two turbos in.

The interesting thing about it was that the two turbos was connected in
series, and that the turbos was of very different size. The turbo
closest to the engine was small and would thus give good low end
performance while the other was a large one giving the real boost.

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I believe that Porsche used this same strategy on the 959.  Not aware 
of any Audi apps though.

Steve B.