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Old 06-21-2005, 07:57 PM   #1
wgb113
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Default What determines loudness of exhaust?

Diameter piping?
Size of muffler?
Shape of muffler?
Resonator?
Tip?

Bill
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Old 06-21-2005, 08:00 PM   #2
elijah25rs
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It's a combination of the engine and the restrictions in the exhaust line (ie resonators, cats, muffler design).
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Old 06-21-2005, 08:01 PM   #3
mycarsux
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everything that you mentioned and what the other guy mentioned. i'm not sure, but i think intake also has a play in it...i want ITBs hahaha
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Old 06-21-2005, 08:04 PM   #4
renslin
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A sound meter will actually determine the loudness of your exhaust!
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Old 06-21-2005, 08:10 PM   #5
cabe
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^^^^LOL^^^^ good point
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Old 06-21-2005, 08:17 PM   #6
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Quote:
Originally Posted by renslin
A sound meter will actually determine the loudness of your exhaust!
no it will measure how loud it is. not DETERMINE how loud it is.
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Old 06-21-2005, 08:22 PM   #7
renslin
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Websters.com
Determine:
To decide or settle conclusively and authoritatively.

A sound meter WILL determine exhaust loudness.
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Old 06-21-2005, 08:29 PM   #8
gtwagon941
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but the meter can't actually "decide or settle conclusively and authoritatively" as it is merely a device that performs a specific task. It is not capable of anything more, such as making a decision or settling something. There is nothing to decide with that device, it measures the sound and produces a reading, that then can be used by a person to determine things.

back on topic:

The biggest things determing how loud are the resonators, cats and engine. Everything listed will contribute, but on a given engine the two things that will most affect sound are the cats and resonators.

Jared
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Old 06-21-2005, 08:34 PM   #9
mycarsux
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just test it out damnit....take everything off and put it back together piece by piece. start with the header and work your way through lol.
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Old 06-21-2005, 11:11 PM   #10
Tim Sanderson
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Sound is vibration. Eliminate vibration and you eliminate sound. Deflect it, absorb it, contain it, or produce the exact opposite frequency to cancel it.
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Old 06-22-2005, 10:03 PM   #11
Caplin 2.5
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mostly what kinda muffler, resonator and most of all how many cats you are running.
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Old 06-23-2005, 05:44 PM   #12
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loud is subjective tho, my brothers legacy turbo is LOUD but its nice throaty loud you'd love to wake up to, whereas my RS is also very loud but more a painful in your face loud(that i love)... i woudl think a sound meter would pick up similar levels.

a resonator really has that much more effect than the actual muffler? for a turbo i can see that being true because the mufflers have much less work to do.

i need to find before and after resonator high quality sound clips...
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Old 06-24-2005, 01:07 AM   #13
Ice Master
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Quote:
Originally Posted by wgb113
Diameter piping?
Size of muffler?
Shape of muffler?
Resonator?
Tip?

Bill
All of those and
the amount of cats 2 versus 1 high-flow or none
Configuration of the headers the un-equal lenght seems louder.
The thickness of the metal

So the stock configuration which is small headers , with two cats, two resonater, small mid-pipe piping , the whole exhaust is made of thick stainless steel and the front is covered by heat shield plates, and a muffler with a maze in it. Versus a Set-up borla headers, catless, midpipe straight 2 1/4 inch, conected to a fart can type muffler you would get the loudest sound.

Here is a clip of my car when I had a Brullen exhaust, headers equal-lenght with one high-flow cat, mid-pipe with 2 resonators and muffler twin-tips. Its the so called quiet set-up which is true but still louder than sock.

http://www.putfile.com/media.php?n=MOV0040592

Last edited by Ice Master; 06-24-2005 at 10:09 AM.
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Old 06-24-2005, 02:10 AM   #14
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everything above
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