924Board.org

augidog · Joined: 03 Mar 2003 Posts: 1360 Location: New Jersey

I think mine is falling apart inside because it just cleared a blockage and it seems to run and sound better
Is it worth the trouble and what should I expect afterwards?
Does it have asbestos in it?
Thanks
_________________
1978 924 95 mile daily driver.
Audi TB/POR174M/High Flow Cat/2.25" exhaust
I knew that positive thinking thing wouldn't work.

Paul · Posted: Sat Aug 23, 2003 12:50 pm Post subject:

Its easy to do, just unbolt it and use a long screw driver.

Be sure to use at least a face mask, you don't want to breath in any of it

Put it in a kitchen trash bag, pull one end of the cat to the top of the bag, seal it with one hand, use the screwdriver in the other.

chriso · Joined: 23 Dec 2002 Posts: 36 Location: Lincoln Nebraska

Call a muffler shop and have them make a replacement pipe. Tell them its for a track car and give them the measurements. They can expand the pipe on both ends and/or weld in flanges.
Mine cost $50.00 and they did a fine job.
Gutting the cat is a power beneficial move, I just worried that I wouldn't get all the crap out or something
_________________
86 924S + 86 944T = one big smile
There is no quick fix or cheap power, not in the Porsche world so learn to drive your car.

Paul · Posted: Sun Aug 24, 2003 8:22 am Post subject:

A bypass pipe is ok if your state does not do a visual inspection of your exhaust system during emissions testing.

blury · Joined: 14 Jun 2003 Posts: 137 Location: Oklahoma

Bursch off raod pipe, Oklahoma kicks ass. No inspections at all.
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Polish your apc banner and shut up

augidog · Joined: 03 Mar 2003 Posts: 1360 Location: New Jersey

yes ,I'm going to have to keep the cat shell.
Visual inspections here along with road stop inspections.
_________________
1978 924 95 mile daily driver.
Audi TB/POR174M/High Flow Cat/2.25" exhaust
I knew that positive thinking thing wouldn't work.

dwak · Joined: 03 Nov 2002 Posts: 839 Location: Eastern Ontario

I've gutted quite a few. Take the unit off and, with a long steel 'spike' and hammer, bust all the coated 'ceramic' stuff into a bag. Do not ingest, etc. Not difficult at all and big brother thinks you're legit. Actually, I think my cars would pass any clean air test without because they're always in tune.

dwak

teo · Joined: 07 Sep 2001 Posts: 637 Location: Hungary, Europe

Actually you should not, one thing is it's not a very friendly thing to do to a cat, the other is that a gutless cat is not that good in catching the mouse.

augidog · Joined: 03 Mar 2003 Posts: 1360 Location: New Jersey

I found this on a web site that upgraded a 924 na-

To handle the exhaust, a EuroCar anit-reversary header was used. Experience has shown this to be the best header for the 924 to date, although it is no longer available. A Borla free-flow stainless steel exhaust, complete with that tiny catalytic converter, carries the hot gasses to the rear of the car. (Funny isn’t it, how tiny and bad for performance the early converters were for the U.S. market, but when German law started encouraging converters, Porsche came up with systems that offer no loss in performance!)

I'm killing my cat this weekend I hope, At least gutting it :)
_________________
1978 924 95 mile daily driver.
Audi TB/POR174M/High Flow Cat/2.25" exhaust
I knew that positive thinking thing wouldn't work.

augidog · Joined: 03 Mar 2003 Posts: 1360 Location: New Jersey

avitar

Paul · Posted: Sun Aug 31, 2003 2:00 am Post subject:

There's nothing like gutted cat.

Pretty easy to do....

Neil924 · Joined: 18 Mar 2003 Posts: 4225 Location: Canada

When they are blocked with crap do they glow red? Possible to see it by looking under the car?

Paul · Posted: Sun Aug 31, 2003 2:04 am Post subject:

Red cats usually means a rich mixture...

Vince Ponz · Joined: 02 Nov 2002 Posts: 3581 Location: Florida

Two of the three holes are blocked. Anybody can see this.
_________________
"Never let them see you sweat"
77.5 924 modified track car
79 931 Euro stock
88 924S SE
87 911 Targa stock

Lizard · Posted: Mon Sep 01, 2003 11:15 am Post subject: