[s-cars] Re: Exhaust dyno results...

[Djdawson2 at aol.com]

In a message dated 9/14/2004 3:37:59 PM Mountain Daylight Time, 
seiche at shadetreesoftware.com writes:

> Dave,
> My understanding has always been that the big gains given by the 
> Stromung system over stock are in the downpipe. I have noticed that the 
> turbo definitely spools faster on cars with the 3" downpipes.   I was 
> told in the past that the restrictions are in the cast turbo flange and 
> the Y where the pipe splits.   
> 
> Personally, I would love to see a test with the stock downpipe (only) 
> and the Stromung downpipe (only).
> 
> Steve
> 

This could well be true.  Unfortunately, I don't have such a downpipe to 
test.  Maybe at some point.  Can't help but wonder why it was designed that way.  
Certainly, a dual exhaust costs more to produce... 2 cats, dual inlet/outlet 
mufflers.  So, that leads me to believe there was some engineering rational for 
its use.  But that's pure speculation...
dave