Could a gutted cat be used as a Y-pipe? - TCCoA Forums
 
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post #1 of 11 (permalink) Old 10-08-2009, 10:03 AM Thread Starter
 
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Could a gutted cat be used as a Y-pipe?

basically what it says. I have to replace my cats and I'm ditching the third, I have spent literally every penny on the new cats and O2's, so if I remove my third cat, and gut it, could I use that as a Y-pipe, how would it affect flow and sound?
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post #2 of 11 (permalink) Old 10-08-2009, 02:53 PM
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I remembered being happy with removing my 3rd cat, but I'm sure the change in sound in not substantial. I removed it on my 97LSC and had a homemade x pipe in place of it and it made it sound slightly more aggressive. Wish I had better info for you.
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post #3 of 11 (permalink) Old 10-08-2009, 03:00 PM
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Sure, you could use it as a y-pipe, but a huge empty chamber is catastrophic to exhaust gas velocity.

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post #4 of 11 (permalink) Old 10-08-2009, 03:03 PM
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Quote:
Originally Posted by master486 View Post
Sure, you could use it as a y-pipe, but a huge empty chamber is catastrophic to exhaust gas velocity.
even more than a huge chamber filled with restrictive stuff?
post #5 of 11 (permalink) Old 10-08-2009, 03:21 PM
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Yes.

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post #6 of 11 (permalink) Old 10-08-2009, 05:07 PM
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.... but a huge empty chamber is catastrophic to exhaust gas velocity.
And is also the reason they sound so bad.

Delete my account.
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post #7 of 11 (permalink) Old 10-08-2009, 05:36 PM
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What's with all the cat gutting talk these days? When did the neon/cavalier crowd start buying these cars?

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post #8 of 11 (permalink) Old 10-08-2009, 06:52 PM Thread Starter
 
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Sure, you could use it as a y-pipe, but a huge empty chamber is catastrophic to exhaust gas velocity.
Thanks, that's what I needed to know. I wasn't sure what that the empty chamber would do.

What if I were to divide it with a piece of metal down the middle, or two pieces in a V like shape to direct the flow a bit??

I don't have enough parts to make a Y-pipe or any money to buy the stuff or a Y pipe, but I can find the stuff to modify a cat slightly.

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Originally Posted by bob9646 View Post
What's with all the cat gutting talk these days? When did the neon/cavalier crowd start buying these cars?

This has nothing to do with me wanting to keep an empty cat on my car, it has to do with having no money to buy the necessary stuff and trying to use what's already available.

I'm not trying to achieve anything more than merging two exhaust pipes together in a way that's beneficial to the flow, not detrimental.

I don't know or understand why anyone would want to gut one or what they hope to achieve, I had to ask because as mentioned above, I don't want it to be a detriment to my exhaust.

I'm still running two cats, and should pass an e-test fine, I'm just dropping the third since it isn't needed, and I'm sure it will help the flow not having it there..... I just need to merge those two pipes in an acceptable manner.

I do also want some sound, I like it loud, and a drone has never bothered me.
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post #9 of 11 (permalink) Old 10-08-2009, 07:16 PM
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get a cheap y-pipe off ebay.. cant find one for $20 or so? beats beating the hell out of a pipe


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post #10 of 11 (permalink) Old 10-08-2009, 07:35 PM Thread Starter
 
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get a cheap y-pipe off ebay.. cant find one for $20 or so? beats beating the hell out of a pipe
Don't have $20.....

keep in mind conversion and shipping to Canada generally makes the purchase 2x more.
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post #11 of 11 (permalink) Old 10-09-2009, 02:42 PM
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It's not hard to make a basic Y pipe, just cut the end of two pipes at an angle, then weld together into a V. Then slip a third piece over that weld, mark, cut, and weld into a Y.

Needs more stall.
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