<VV> Re: For True Turbo Techies

[John]

The article Seth references is at:
<
http://www.ai-online.com/issues/article_detail.asp?id=545
>

Grab it before it is replaced by next month's issue.  I've converted it
to a pdf file if anyone is interested.

John Dozsa

> From: Sethracer@aol.com
> Date: Fri, 10 Sep 2004 14:33:41 EDT
> To: virtualvairs@corvair.org, fastvair@yahoogroups.com
> Subject: <VV> For True Turbo Techies
> 
> In the August Issue of Automotive Industries Magazine, there is an article
> on a new BMW Turbo-diesel 3.0 Liter inline 6-cylinder motor. It uses two  t
> urbo-chargers, but neither in the side-by-side set-up like the 300ZX or the
> compound, in-line, version like the 3rd gen RX-7. Instead it uses them in  parallel
> (sort-of). A small turbo to boost at low revs with intake air  pulled through
> the larger turbo (it's exhaust side operating but not very  effective, since
> the exhaust gas has already gone through the small turbo.) At  mid-range, the
> exhaust goes through both turbos, though some exhaust gas  bypasses the
> smaller turbo and goes to the bigger one. Eventually only the large  turbo is
> operating, and the small turbo is bypassed. The engine puts out 268 HP  from 183
> cubes, (and 391 lb.ft or torque) and the torque curve is flat from  1500 RPM to
> 5500 RPM - A high RPM for a diesel. The AI article  has some schematics and
> photos. Worth finding a copy. - Seth  Emerson