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

[Rabbit16v@attbi.com (Rabbit16v)]

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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