Will a new Cat converter be louder ????? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 07-29-2004, 11:13 AM   #1
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Default Will a new Cat converter be louder ?????

I need to change my Cat converter. The stock converter is huge, and I am wondering how much it acts like a muffler. I plan on replacing it with a very small converter from Random Technologies. Can anyone comment on how much louder my system might get with a new converter? The rest of the exhaust system is stock.

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Steve
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Old 07-29-2004, 11:35 AM   #2
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It will have more of an effect on a 92 or 93, as those 2 years didn't have a factory-installed resonator. However, your muffler appears to be stock, so any cat change would be barely noticed if at all. The combination of Cat and Muffler, with the lack of a resonator, is what really affects the sound.
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Old 07-29-2004, 12:45 PM   #3
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The pipe diameter isn't smaller, though, right??
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Old 07-29-2004, 02:38 PM   #4
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I had a performance muffler on when i got my high flow cat installed and it was definatly louder. i have the stock resonator too.
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Old 07-29-2004, 03:01 PM   #5
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Pipe diameter is the same all the way through the SSEi'*. 2.5"

A performance muffler will allow you to hear the difference in cats, but the different cats won't be as obvious through a stock muffler.
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Old 07-29-2004, 03:04 PM   #6
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Default Re: Will a new Cat converter be louder ?????

Quote:
Originally Posted by TelePlayer
I plan on replacing it with a very small converter from Random Technologies.
The one from Random Technologies is just smaller in the catalyst area, not the pipe diameter, right?


That'* what I meant, Will.
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Old 07-29-2004, 03:08 PM   #7
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I heard a big differance with a high flow cat on my 93 SE but I dont have a res.
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Old 07-29-2004, 11:37 PM   #8
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Default Re: Will a new Cat converter be louder ?????

Quote:
Originally Posted by TelePlayer
I need to change my Cat converter. The stock converter is huge, and I am wondering how much it acts like a muffler. I plan on replacing it with a very small converter from Random Technologies. Can anyone comment on how much louder my system might get with a new converter?
IMHO, the new convertor will be slightly louder, but maybe not for the reasons you think; it would probably sound louder because it'* new and clear, whereas your (12-year-old?) original convertor is probably at least a little corked-up by now.

I can tell you from experience that if the rest of the exhaust system isn't there, the difference in noise levels between a convertor only, and nothing at all, is the difference between Loud and D*mned Loud. So there'* some noise muffling ability, but your old one is doing more of that than your new one will.
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