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Off Topic Forums => General Chat => Automotive => Topic started by: brandogg on September 22, 2004, 11:23:00 AM

Title: Eliminating Catalytic Converter In A '97 Accord
Post by: brandogg on September 22, 2004, 11:23:00 AM

Howdy. Here's my problem(s). I have a '97 Accord (haha Rice, haha). It's not "pimped-out" or anything like that. Anyway, my exhaust has basically rusted through the entire catback, and recently (about 2 weeks ago), I hear a rattling sound when I'm driving, my 2 knowledgable buddies told me it's my catalytic converter, which makes a lot of sense to me. From what I understrand, it's about $250 to replace, but to just take it out and put in a piece of steel pipe would be a hell of a lot cheaper, and actually give a slight performance boost, since I'm also very soon going to get a new exhaust system, new headers, and probably a new throttle boddy and fuel rail. Is it easy just to take out the cat and replace it with some stel pipe? I know it's illegal, but no one ever checks for this kind of stuff.

Title: Eliminating Catalytic Converter In A '97 Accord
Post by: fishlord on September 22, 2004, 03:33:00 PM

Yes.  It is easy.

Title: Eliminating Catalytic Converter In A '97 Accord
Post by: Rylinkus on September 22, 2004, 03:52:00 PM

Itll need flanges welded on to it to attach. Generally its 2 bolts at each end of it. What I did with mine was pulled the cat. Got in a different car and went to a few parts shops til I found a place that sold flanges almost identical to the ones on my car. (Close enough to work) Then I got a piece of Stainless Steel piping in the proper size and length. I went to a local muffler place and had them make me an "Exhaust Extension" for my car. If you pick the right shop you could prob get all the parts and have it assembled there for 40 bucks.

That being said, test pipes ARE illegal. Never use the word test pipe or talk about replacing your cat. The best excuse is that you got a cheap exhaust system from a friend and need X inches of pipe to attach your header to your cat since you're falling that far short. Any competant muffler shop should be able to rip one out in 15 minutes at worst.

Title: Eliminating Catalytic Converter In A '97 Accord
Post by: fishlord on September 23, 2004, 01:39:00 AM

you dont need the flange... couldnt you just get the ends flared?

Title: Eliminating Catalytic Converter In A '97 Accord
Post by: Rylinkus on September 23, 2004, 01:42:00 PM

generally theres flanges on the cat that attach to flanges on the headers and flanges on the exhaust. I suppose you could cut those off, but I'd be damned if I'd do that to parts of my exhaust system.

Title: Eliminating Catalytic Converter In A '97 Accord
Post by: fishlord on September 23, 2004, 02:26:00 PM

is the cat attatched directly to the exaust manifold in an accord?  I was assuming that there would be a piece of pipe running from the manifold to the cat in which cast one woudlnt need a flange (especially if he is planning on ditching the whole setup soon anyways)

Title: Eliminating Catalytic Converter In A '97 Accord
Post by: fishlord on October 02, 2004, 09:30:00 PM

yup u do.

Title: Eliminating Catalytic Converter In A '97 Accord
Post by: Rylinkus on October 02, 2004, 11:50:00 PM

QUOTE (fishlord @ Oct 3 2004, 05:33 AM)

yup u do.

There's 50 states, that only applies in some of em.

Title: Eliminating Catalytic Converter In A '97 Accord
Post by: fishlord on October 03, 2004, 11:31:00 PM

there are states that dont require a cat?

Title: Eliminating Catalytic Converter In A '97 Accord
Post by: ocojaa on October 04, 2004, 09:18:00 PM

Kentucky (the state I live in) has no emissions, or any other testing.

Title: Eliminating Catalytic Converter In A '97 Accord
Post by: zerphyte on November 19, 2004, 05:55:00 PM

For a 97 or older, North Carolina doesn't require emissions.

Anyway the answer to your question.

Get about a 3" *MANDREL* bent stainless steel pipe. Make sure it's mandrel bent or you'll be sorry.

Title: Eliminating Catalytic Converter In A '97 Accord
Post by: jesterrace777 on November 21, 2004, 03:12:00 AM

QUOTE (Rylinkus @ Oct 3 2004, 07:53 AM)

There's 50 states, that only applies in some of em.

Actually it can also varry by county.  The county I live in requires air emissions, but both of the counties on either side of mine don't.

Title: Eliminating Catalytic Converter In A '97 Accord
Post by: mynuffinfutsitch on November 24, 2004, 06:28:00 PM

you could drill the catyltic converter out . Little be-bees will come out

Title: Eliminating Catalytic Converter In A '97 Accord
Post by: drink or die on December 09, 2004, 12:28:00 AM

QUOTE (zerphyte @ Nov 20 2004, 02:58 AM)

For a 97 or older, North Carolina doesn't require emissions. Anyway the answer to your question. Get about a 3" *MANDREL* bent stainless steel pipe. Make sure it's mandrel bent or you'll be sorry.

are you just pulling that word out of your ass? mandrel bent tubing and compression bent tubing have nothing to do in this case. it's a straight pipe, with flanges on the end. I have yet to see any catalytic converter that had a bend in it.

Title: Eliminating Catalytic Converter In A '97 Accord
Post by: fishlord on December 09, 2004, 10:59:00 AM

QUOTE (drink or die @ Dec 9 2004, 09:31 AM)

are you just pulling that word out of your ass? mandrel bent tubing and compression bent tubing have nothing to do in this case. it's a straight pipe, with flanges on the end. I have yet to see any catalytic converter that had a bend in it.

not to mention the fact that 3" is completely rediculous for the car in quesiton.

Title: Eliminating Catalytic Converter In A '97 Accord
Post by: Rylinkus on December 09, 2004, 09:23:00 PM

QUOTE (mynuffinfutsitch @ Nov 25 2004, 03:31 AM)

you could drill the catyltic converter out . Little be-bees will come out

Or you can just drive rebar through it to knock out all the crap inside. Though that's a pain in the ass as the crap in a cat is MUCH harder to brake then one would think. Though it CAN be beaten out.

Title: Eliminating Catalytic Converter In A '97 Accord
Post by: drink or die on December 10, 2004, 06:30:00 PM

My catalytic convertor had no bb's in it. it's sorta a ceramic honeycomb type deal. to get it out, I found the easiest way is to jam one of those huge flathead screwdrivers into the honeycomb, and then twist. it broke out the honeycomb in big chucks, and they were then able to be poured out of the end of the pipe.