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Old 09-09-2003, 03:40 PM   #1
pistoffjstr
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Default Gutted CAT

I have a 2000 RS with Borla headers and a Tanabe super racing medalion cat back would it help or hurt to gut the cat/cats and has anyone done this
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Old 09-09-2003, 06:15 PM   #2
Julian
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1. Why would you think it would help?
2. Don't you care about the air you breathe?
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Old 09-09-2003, 06:23 PM   #3
JewPac42
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Quote:
Originally posted by Julian
1. Why would you think it would help?
2. Don't you care about the air you breathe?
Why do you ask such stupid questions instead of answering his question?

Yes, of course removing the cat would help free up more power. Currently you have a bottleneck of airflow at the cat and removing it would free up a little more power.
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Old 09-09-2003, 08:00 PM   #4
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You could always go to a muffler shop or performance shop and get a custom catless midpipe made for cheap.
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Old 09-09-2003, 08:33 PM   #5
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Quote:
Originally posted by Zen
You could always go to a muffler shop or performance shop and get a custom catless midpipe made for cheap.
You get more power this way because the piping is also a bottleneck in the cat section.
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Old 09-09-2003, 09:51 PM   #6
pistoffjstr
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Quote:
You could always go to a muffler shop or performance shop and get a custom catless midpipe made for cheap.

thought about that too then i would have to get the end fittings so i could bolt it right up maybe i will just do that ....looking at my cat it might cause wierd airflow instead of smooth if i just gutted it
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Old 09-10-2003, 11:30 AM   #7
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Quote:
Originally posted by pistoffjstr



thought about that too then i would have to get the end fittings so i could bolt it right up maybe i will just do that ....looking at my cat it might cause wierd airflow instead of smooth if i just gutted it
Bingo! Gutting the cat on any car, and especially our cars with the pipe routing will lead to significantly more turbulence in the exhaust system. It would definitely be better to get a test pipe made up, better for power and you can keep your cat section for those "just in case" times.
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Old 09-10-2003, 05:39 PM   #8
Julian
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JewPac, who let you out of your cage?

In any case, why do you think the cross section of the cat is so much larger than the inlet pipe diameter? Do the math.

If you think gutting your cat will gain you any noticable horsepower in your Subaru, think again. Or show me the dyno sheet.
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Old 09-10-2003, 06:52 PM   #9
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Julian, you could have been a little more helpful at first. Honestly who answers a question with a question. You definatly came off as a wise guy. Maybe you are, I don't know you. If he knew the answer he wouldn't be asking it. I'm sure someone talking as if they know it all dosn't help, just a simple answer would probably help him out.
If I were you I would get a pipe made or just buy a high flow cat. You may find it hard to get a shop to make you a pipe since you would be removing your cat. If you get pulled over and you rat them out they will get an insanly huge fine. They basically say they will forget the ticket if you tell them who took it off. If your good friends with the person who did it then you obviously won't rat them out but normal shops won't take a great chance on someone they don't know.
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Old 09-10-2003, 09:11 PM   #10
pistoffjstr
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i was thinking about just going to a junkyard and getting a small cat and ramming a strait pipe through it and then getting the proper fittings welded to it and put that on ....that way it at least looks like there is a cat
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Old 09-10-2003, 09:17 PM   #11
mprezuhguy
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Would it be important for it to look like there was a cat? Would a cop really check to see if you had one? And would he know where to find it? It seems to me having a replacement mid-pipe made with out the cat might be a good idea, then you can take the stock one off and put it back on for smog time.
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Old 09-10-2003, 10:15 PM   #12
EvasionOfTruth
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Quote:
Originally posted by pistoffjstr
thought about that too then i would have to get the end fittings so i could bolt it right up maybe i will just do that ....looking at my cat it might cause wierd airflow instead of smooth if i just gutted it
That it does, it also sounds really odd too. I ended up getting a high flow cat and pipe made up. Ran me about 140 for cat and pipe.

As for not adding performance I'll throw up the BS flag. People that have rode in my car numerous times noticed the difference. 4th gear pulls a good amount harder. As for dyno sheets pay for it and I'll gladly get you some

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