quattro digest, Vol 1 #2101 - 7 msgs

[Per Lindgren]

Wasnt this basically the same that was done on the Porsche 959? That one had two
different sized turbos, one smaller to get rid of the lag. the small one handled
the bottom end, the big one handled the top end of the revs.

PerL
92 Cabrio 2.3E



Andrew Lundy wrote:

> Sequential turbos...
>
> You have two SAME size turbos.  You hook one turbo on each bank of
> cylinders.  One turbo is set to spool up at an earlier RPM than the other
> turbo.  As you indicated, this early "spool" is to reduce turbo lag.  With
> sequential (and generally twin turbos) the turbos used are small.  Again, to
> reduce lag!!
>
> The first car that I saw that did sequential turbos "successfully" (no lag)
> was the 1996 993 Turbo.  It's becoming the norm with twin turbo's now!!
>
> That's as much (or as little) as I know on the subject!!
> ---
> Andrew Lundy
> fast928 at prodigy.net
> 90 80q
> 99 A6q
>
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