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Punched the Cat?
Jack (fellow Pelicanite) and I have always suspected that my catalytic converter has been punched out. Mainly, because his car (87 Coupe) is so much quieter than mine (88 Cab) at idle.
I decided to change out my 02 Sensor (since it’s never been changed) and I thought I would be able to see if the CAT was punched out. Well, I can stick this copper wire all the way down the CAT. So does that confirm it? Shouldn’t I be running into the inerd’s of the CAT with the wire if it is NOT punched out. Now I’m wonder how the P-Car will run with a new 02 and a punched out CAT (if it is)?  
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10-04-2004, 03:05 PM
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Yes you should run into something with the copper wire.
The CAT has a fine grill-like look. Will run fine with a new 02 since it reads the info prior to entering the CAT.
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Tim. 1988 911 Carrera. Silver. 1973 914 Metalic Blue. 2012 Cayenne S |
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10-04-2004, 03:17 PM
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Join Date: Oct 2000
Location: TX
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Does it sound hollow if you tap on it? I converted mine some years ago before the SSI conversion. Without the ceramic grid in place it sounds much "Emptier" if you rap it. There is no way you could get that wire in there either as the holes in the ceramic are too small to allow a bent up wire to pass through.
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Eric Purdy |
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10-04-2004, 04:05 PM
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MBruns for President
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So, got the O2 sensor out eh?
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Current Whip: - 2003 996 Twin Turbo - 39K miles - Lapis Blue/Grey Past: 1974 IROC (3.6) , 1987 Cabriolet (3.4) , 1990 C2 Targa, 1989 S2 |
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10-04-2004, 05:04 PM
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yep....PB worked well, thanks for the info Jeremy....banged my hand right off the brake drum though when it broke free.....I had few choice words....kids weren't around to hear those words..... and ice got the swelling down. Porsche's can be painfull to wallet and apendages.
Jason |
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10-04-2004, 05:21 PM
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Yepper....must be hollow then. Oh and Jack spotted that someone took off my rear brake pad sensors. Gee....another project.
Jason |
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10-04-2004, 05:27 PM
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Join Date: Mar 2004
Location: WV.
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How much of a performance gain will you see with a cleaned out cat? Is this an accepted mod or a no no??
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10-04-2004, 05:28 PM
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MBruns for President
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Quote:
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Current Whip: - 2003 996 Twin Turbo - 39K miles - Lapis Blue/Grey Past: 1974 IROC (3.6) , 1987 Cabriolet (3.4) , 1990 C2 Targa, 1989 S2 |
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10-04-2004, 05:56 PM
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Someone proved that you get a performance drop if you gut the cat. I ran a gutted cat for a while. It's just louder. You need some back pressure.
You gain a bit of power if you install a euro pre muffler. I have one now. A search will touch on all of this. There is also a chart comparing the euro pre+ 1 in two out and the ssi systems with 2 in 2 out. Lee78sc
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78SC coupe, Silver Metallic |
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10-04-2004, 05:59 PM
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Too big to fail
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Quote:
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"You go to the track with the Porsche you have, not the Porsche you wish you had." '03 E46 M3 '57 356A Various VWs |
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10-04-2004, 06:20 PM
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"As a COBOL programmer" and
"meanwhile the rest of us are running disc brakes on our 911s" Actually, Systems Programmer on CICS and MQ. Good catch.....slip of the tongue (and hand on the DISC brake - OUCH). I use to live in Orangevale. Sure miss that part of CA. Jason Last edited by cicsprog; 10-05-2004 at 02:51 AM.. |
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10-05-2004, 02:49 AM
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Join Date: Aug 2002
Location: Galivants Ferry, SC
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parking brake is *still* a drum......so it's not as absurd as it first sounded...
Wil
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Wil Ferch 85 Carrera ( gone, but not forgotten ) |
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10-05-2004, 04:51 AM
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1988 Porsche 911 3.2
Gone to California
Turbo
Silver 911SC
