RE: Performance difference w/o a cat?

["Crane, Damien" <d3c@TENNANTCO.com>]

	One of the magazines I just got (don't remember which one) was
working on a project car.  They were doing an exhaust thing and found their
car had a hollowed out cat.  They put a new cat on, and the car made more
power with the cat than without.  

> >
> >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
> >
> 
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