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| Engineering/Technical Ask technical questions about cars. Do you know how a car engine works? |
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11-21-2007, 02:35 PM
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#1 | |
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AF Newbie
 Join Date: Aug 2007
Location: mayfield, Ohio
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catalytic converter Q
i know the cat. reduces emitions but does it affect the sound at all?
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11-21-2007, 02:43 PM
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#2 | |
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Professional Ninja Killer
 
Join Date: Nov 2002
Location: Penn Hills, Pennsylvania
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Re: catalytic converter Q
Yes, it has a small muffling effect. It muffles about half as much as a good muffler would.
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11-22-2007, 12:52 PM
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#3 | |
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AF Enthusiast
Join Date: Jan 2006
Location: Shelbyville, Tennessee
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Re: catalytic converter Q
It affects the sound a great deal. With cat and muffler exhaust is nice and quiet, with cat and no muffler exhaust is quite a bit louder, with muffler and no cat exhaust is between stock and without muffler but not much louder than stock setup, with nothing just straight piped it's extremely loud almost to the point of a nascar exhaust.
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11-22-2007, 08:12 PM
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#4 | |
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AF Newbie
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Re: catalytic converter Q
so if you wanted to make a sleeper could you put 2 cats on or 2 mufflers? i mean just so it is real quiet
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11-22-2007, 08:34 PM
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#5 | |
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Professional Ninja Killer
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Re: catalytic converter Q
Yes at the risk of restricting exhaust flow to the point where your power suffers considerably.
Use good quiet mufflers, use a crossover pipe (H or X), and add resonators. Resonators are basically extra mufflers that use sound deadening material in a free-flow design to further cancel noise. Some people use race "bullet" mufflers as resonators with good success.
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