Re: Injesting pieces parts

[QSHIPQ@aol.com]

In a message dated 98-06-13 09:40:02 EDT, you write:

<< I was wondering that myself.   I wonder if the 3-way outlet splitter in 
> the manifold can crack enough to let pieces go into the turbo?
Sure.  So can whatever the turbo tried to injest, as it slows down on shutoff.
Once the parasite is upstream of the compressor, the next place it will make
mucho damage is in the turbine blades.  

 
> Has anyone ever slimmed down that three way splitter to improve flow out 
> of the exhaust manifold?
Not sure why, be careful here.  I suppose you could get a better flow by
making it a blade at the end, but I doubt your gains measureable.  Slimming
down the splitter can change the runner/collector/nozzle ratios, something I
would recommend understanding (and working thru the math) before using the
dremel or EH services.  The audi turbo exhaust manifolds are pretty good in
rock stock trim.  Gains here are minimal at best.  I certainly would address
the components after that collector first, like the turbo, the downpipe and
the exhaust.   Then I would go upstream of the collector, like the IM, head,
and FI.  Even then, not sure the collector would give any measureable
improvement.  RE-designing the EM to be equal length headers, now that's a
different story.  Huge project tho...

Scott Justusson
 
 Later,
 Graydon D. Stuckey
  >>