Re: Performance difference w/o a cat?

[Jim Buck <vwpride@mixi.net>]

"New 2" Racing Dual Downpipe for Scirocco 16v
Same as above except with 2" primary pipes. This
 downpipe was designed for modified engines. Adds
 approximately 11hp."

I don't claim that it adds 11hp Chris, TT does.  It may be less, it may be more,
but my main point was (and still is) that consistent pipe diameter throughout the
sytsem will provide more torque and hp than a big ole cat chamber just 1 1/2 feet
downstream from the header (read: turbulence=bad).  The Scirocco cat is one of
the best out there, but still is no match for a non-cat dual downpipe, even if
the one i've described is for modded engines.  Get one=go faster.

jim



Chris Coracini wrote:

> >
> >I agree.   Precious exhaust gas velocity is severly hindered when the
> >downpipe opens
> >up into the cat, then must be re-funneled into the rest of the system.  Not
> >exactly a
> >device designed with performance in mind, although it is a highly efficient
> >unit, as
> >far as cats go.  Going with a catless downpipe like the new TT offer greater
> >torque,
> >throttle response, and hp (I think TT claims 11 peak).
>
> hold on, 11hp?!?!  hmmmm...  i seriously doubt that, VERY seriously.
> maybe comparing the single outlet manifold/downpipe w/cat to a dual
> outlet manifold/dual long downpipe, then MAYbe it would be close to
> 11hp.  but not comparing the 16V dual downpipe with or without a cat, no
> way...
>
> chris
> 86 16V scirocco
> >

--
Jim Buck
1990 Passat Wagon 2.0 16v
1987 Scirocco 16v "lil 109"
1982 Rabbit Convertible **FOR SALE** http://www.mixi.net/~vwpride/cabbie.htm

Got Wheels? Visit anyway!

http://www.mixi.net/~vwpride/



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