[s-cars] Sequential Turbocharging
Jason Mawhinney
jmawhinney at skybest.com
Fri Jan 6 09:24:12 EST 2006
I think the new (Europe only) Golf will get the twincharger engine that I
think was mentioned in another post. Sounds very interesting but also
sounds pretty complicated. Here's a short article on it.
http://www.popsci.com/popsci/automotivetech/502459855fd27010vgnvcm1000004eecbccdrcrd.html
----- Original Message -----
From: "Richard Tanimura" <richard.tanimura at gmail.com>
To: "Dave Forgie" <forgied at direct.ca>
Cc: <s-car-list at audifans.com>
Sent: Friday, January 06, 2006 1:58 AM
Subject: Re: [s-cars] Sequential Turbocharging
A mechanic friend who does Porsches built what I think might be just as
interesting. He had a sequential blower and turbo. The
blower/compressor/supercharger gives him a lot of grunt at low RPMs.
Probably more than and further down than a small turbo can give. He has
built a mechanical control somewhat like a heart valve. When the pressure
from the turbo exceeds the pressure from the blower, the valve switches over
and the blower cuts out.
You could use a very small turbo in the first stage but the parasitic losses
caused by pushing gas through a small restrictor (hotside of the first
turbo) would be a negative factor for getting real push out of the second
stage. Both ideas are fun. Looking forward to seeing somebody try some
solutions.
Richard
On 1/6/06, Dave Forgie <forgied at direct.ca> wrote:
>
> Steve: I think I saw the BMW sequential turbo thing on Top Gear. I was
> also thinking about this and how Toyota did that with the early 1990's
> Supra. I think one of the problems that would have to be over come is
> getting space to locate the two turbos with out one of them being too
> close to something that burns. Maybe something small like a K04 for the
> lead turbo and something bigger like a K27 (26??) for the upper end.
> Software would be the second challenge.
>
> Dave F.
>
> _______________________________________________
> S-CAR-List mailing list
> S-CAR-List at audifans.com
> http://www.audifans.com/mailman/listinfo/s-car-list
>
_______________________________________________
S-CAR-List mailing list
S-CAR-List at audifans.com
http://www.audifans.com/mailman/listinfo/s-car-list
More information about the S-CAR-List
mailing list