[s-cars] NAC: 997 & 911 GT3

[Dave Ellis]

I was interested by the VTG (variable turbine geometry) turbo mentioned, 
and did a little digging for more info.  While there's not a lot of 
in-depth info available on the 'Net, phrases like

   "...working with Borg Warner Turbo Systems, Porsche
    has overcome the temperature limitation [of using
    VTG designs on a gas engine] through the use of
    temperature-resistant materials derived from
    aerospace technology..."

make me think this VTG turbo will be amazingly expensive, at least for 
the first few years.  Even if pricing was not an issue, the variable 
vane geometry is controlled not by a mechanical system, but 
electronically through the car's Motronic ECU programming.  It's not 
clear at this stage what would be required to adapt one of these VTG 
turbos to our cars;  if our current ECUs could be adapted in some way, 
or a separate "black box" solution could be found, or if a completely 
new ECU and engine management system would be needed.

Just openly (and idly) speculating,
-Dave



matt ludwig wrote:
> wow......
> 
> http://www.porsche.com/all/masterwerk/usa.aspx
> an awesome summation (and glorification) of the turbo
> 
> http://www22.porsche.com/all/originmotorsport/usa.aspx
> a great rich-media display of what we would like to hope to sit in,  
> er- hope Paul K. can sit in and tell us about in detail.....
> 
> matt ludwig.
> 1995.5 S6 Avant
> Lima, Peru