[s-cars] Sequential Turbocharging

[djdawson2 at aol.com]

Nope... turbo mounted directly on top of the blower inlet... early ones didn't even use an aftercooler.  The blower provides instant boost at low rpm.  As the turbo boost builds, it simply feeds higher pressures to the blower.  Typical measurements were 28psi from the turbo, and an additional 8-12 from the blower.  The result is a small engine with a great torque curve.
 
These engines were also unique in that they were 2 strokes... with 4 exhaust valves in the head.
 
Dave
 
-----Original Message-----
From: Richard Tanimura <richard.tanimura at gmail.com>
To: djdawson2 at aol.com <djdawson2 at aol.com>
Cc: Strangconst at rogers.com; s-car-list at audifans.com
Sent: Fri, 6 Jan 2006 18:14:28 +0100
Subject: Re: [s-cars] Sequential Turbocharging


Dave,
 
I know you well enough to assume that you meant a blower feeding a turbo...right? Otherwise enlighten me cuz I can't see the principle.
 
....
Detroit Deisel used a turbo feeding a blower on top of a V configuration engine from WW2 until very recently.  No special vng, and it worked quite well... serving duty in arena where the competition was using engines of much larger displacement to do the same job. 
...
 
Richard
 
PS - There is still Trevor and Mike.