Cats - new reply to old thread re: How much restriction can a Cat be?

[rfkellner@snet.net (Rick Kellner)]

I hope PETA is not monitoring the list.
Rick Kellner
84 8v
----- Original Message -----
From: "Rabbit16v" <Rabbit16v@attbi.com>
To: "Scirocco List" <scirocco-l@scirocco.org>
Sent: Wednesday, November 20, 2002 11:52 AM
Subject: Re: Cats - new reply to old thread re: How much restriction can a
Cat be?


> Depends on where they are.  If you get a cat stuck in your air box, the
hair
> would probably create quite a restriction but I don't think you could get
> one in your exhaust unless it was a kitten or you had 3inch exhaust!!  In
> any case you should blow it right our upon starting the motor.  Having cat
> troubles??
>
> HTH!
>
> Dave
> ----- Original Message -----
> From: "T Berk" <tberk@mindspring.com>
> To: "Rick Kellner" <rfkellner@snet.net>
> Cc: <scirocco-l@scirocco.org>
> Sent: Tuesday, November 19, 2002 11:54 PM
> Subject: Cats - new reply to old thread re: How much restriction can a Cat
> be?
>
>
> > Rick Kellner wrote:
> > >
> > >     I am in the process of replacing my entire exhaust with a TT
system
> and
> > > a TT down pipe so everything is off including the catalytic converter.
> I
> > > have never take this one off and was surprised to see how it was put
> > > together.  It is just a can filled with screens!  I know people
replace
> > > these with high flow cats but how much restriction can these be?
Anyone
> > > really notice a difference between the stock and an upgrade or even a
> > > straight pipe?
> > > Rick Kellner.
> > > 84 8v
> > >
> >
> > Rick,
> >
> > Sorry for the delay, I am just now going back over some unread list mail
> > from October.
> >
> > Your look down the cat looks like it's screens but what you are seeing
> > is a matrix or a ceramic type substance. Note how the holes are
> > parallel, they are like long thin tunnels packed close together, side by
> > side.
> >
> > A good cat doesn't restrict too much, and only really aids HP gains when
> > in the near redline area.
> >
> > 'Upgrading' to straight pipe should only be done if it comes without
> > introducing restrictions or changes in diameter. Hollowed out cats are
> > worse than good cats because of this reason.
> >
> > If you are in California or some other state/area that cares you won't
> > want to get caught without a cat in a car that came with one.
> >
> >
> > hth,
> > TBerk
> >
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