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Re: twin turbos?
On Wed, 5 Jun 1996, Steve Powers wrote:
> Mazda uses a sequential setup on the RX7. The small
> turbo spools up quickly to provide HP down at lower
> exhaust pressures while the big one will kick in at
> greater exhaust pressures. I believe that both actually
> work at higher pressures.
One minor point here, both turbos on the Mazda twin turbo setup are
identical. Other than that, you are right on.
> Other than space (and budget) limitations, control
> complexity, etc., is there any fundamental reason why
> this approach hasn't been developed for Audis?
Since the Audi is a 5 cylinder, that compounds the difficulty in
designing and fabricating an exhaust manifold. I _think_ that a plenum
that fed the two turbos could be made to work though. I like the idea.
Graydon D. Stuckey
Flint, Michigan USA
'86 Audi 5000 CS Turbo Quattro, GDS Racing Stage II