puching cats.

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puching cats.

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Audi Forums >> Audi Models >> S Car Model Line >> puching cats.

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puching cats. - 5/13/2008 5:39:26 AM

pepsicolla

Posts: 39
Joined: 5/2/2008
Status: offline

If I punch cats on my 2000 s4 will i throw codes? If so what can i do to avoid this?
I pretty sure i read somewhere that an aftermarket chip will ignore this but not sure where i read it now.
Does anyone else have a tough time with this sites "search" option? cant seem to get any results out of it.

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RE: puching cats. - 5/13/2008 6:12:32 AM

sweeds4

Posts: 940
Joined: 8/1/2007
From: Boston
Status: offline

Vast CELimiators.

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2001 black stage 3 Totaled!

2001.5 Nogaro- stage 2 - soon to be stage 3!

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Post #: 2

RE: puching cats. - 5/13/2008 6:32:57 AM

Blue_S4

Posts: 471
Joined: 8/27/2007
Status: online

i have my cats completely gutted, not just punched, and im not throwing codes at all.....may just be lucky tho

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RE: puching cats. - 5/13/2008 7:16:39 AM

CamoA6

Posts: 631
Joined: 8/19/2006
From: New Haven, CT
Status: offline

Blue S4, did you notice a difference and power? if so, how much?

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RE: puching cats. - 5/13/2008 8:03:25 AM

pepsicolla

Posts: 39
Joined: 5/2/2008
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quote:

ORIGINAL: sweeds4

Vast CELimiators.

Sweeds4: If i gut the precats and get cel eliminators....will i still have to relocate and plug the O2 bungs? or can i leave them in their current location?
Also, will this method also work for the rear cat?

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Post #: 5

RE: puching cats. - 5/13/2008 8:08:42 AM

sweeds4

Posts: 940
Joined: 8/1/2007
From: Boston
Status: offline

I dont think so, but check out the vast site, they might tell you on there.

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2001 black stage 3 Totaled!

2001.5 Nogaro- stage 2 - soon to be stage 3!

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Post #: 6

RE: puching cats. - 5/13/2008 7:48:38 PM

drev500@aol.com

Posts: 133
Joined: 1/14/2008
Status: offline

I just did the piggie pipes and they were a PITA. But to answer your question, you can get the eliminators or relocate the O2's. Also since your already putting holes in the cats you should just take them out completly. Its hard work but pays off at the end when your making boost the second you touch the gas. Also you can hear the turbos a lot more

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Post #: 7

RE: puching cats. - 5/14/2008 8:09:21 AM

audi ops

Posts: 618
Joined: 10/7/2007
Status: offline

Relocating them is the better way. The car is better off with the info from the o2 sensors for air mixture and fuel mixture and good running order and all that. You get like a few hp doing it, but the real trade off is instant spool for the turbos. Oh and its the rear ones you relocate and would get the eliminators for you don't touch the front.

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The Rides...

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Post #: 8

RE: puching cats. - 5/14/2008 10:56:27 AM

Blue_S4

Posts: 471
Joined: 8/27/2007
Status: online

not in the seat of my pants....i did several things at once, but i can gaurentee it made a difference since my old ones were pretty messed up and melted.

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RE: puching cats. - 5/17/2008 7:02:05 AM

SVOSHOP

Posts: 7
Joined: 5/15/2008
Status: offline

First post... Hi everyone.

Do the rear O2 sensors actually relay information to the PCM for fuel mixture purpouse. Or are they there simply to enforce that the converters are working as they should. ie... the pre converter 02's take the readings for fuel mixture, the rear 02's just ensure that the converters are doing what they should, based on the difference in value read by the 02 sensor itself.

Mike

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Post #: 10

RE: puching cats. - 5/17/2008 8:56:11 AM

meatbiscuit

Posts: 295
Joined: 6/14/2006
Status: online

quote:

ORIGINAL: audi ops

Relocating them is the better way. The car is better off with the info from the o2 sensors for air mixture and fuel mixture and good running order and all that. You get like a few hp doing it, but the real trade off is instant spool for the turbos. Oh and its the rear ones you relocate and would get the eliminators for you don't touch the front.

Agreed.

Also, if you are throwing codes, you can get the chip from APR and have fault code erasing programmed in at install time. Might want to check and make sure it will clear codes from the O2 sensors though, it might only clear codes related to things like overboost.

(in reply to audi ops)

Post #: 11