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Registered:
April 2003
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legal DB limit for 4cylinders
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Tue, 27 May 2003 08:58
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hey all,
just wondering if anyone could tell me what the legal DB limit is for a 4 cylinder exhuast???
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Location:
Sydney
Registered:
May 2002
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Re: legal DB limit for 4cylinders
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Tue, 27 May 2003 08:59
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its the same no matter how many pistons u got right ???
The one i know of is 96 DB
Ta
Mani
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: legal DB limit for 4cylinders
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Tue, 27 May 2003 09:01
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it's the same for all cars
the old law was 96db
the new law is 92db
but as longa s your car was made before the new law came in (2001? 2002?) you can get through under the old guidelines (I think)
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Registered:
April 2003
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Re: legal DB limit for 4cylinders
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Tue, 27 May 2003 09:06
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kewl thanks
my car is 86 and 88 so that is all good anyway
see ya later to that fine
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Re: legal DB limit for 4cylinders
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Tue, 27 May 2003 09:49
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HEhe, my supra was measured at 103dB before the alst exhaust upgrade !!
more than twice the legal limit !
Matt
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Location:
Melbourne
Registered:
March 2003
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Re: legal DB limit for 4cylinders
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Tue, 27 May 2003 10:03
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so whats the limit for pre 2000 cars?
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Location:
Sydney
Registered:
May 2002
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Re: legal DB limit for 4cylinders
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Tue, 27 May 2003 10:07
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Intense: as stated above
96DB
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Registered:
April 2003
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Re: legal DB limit for 4cylinders
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Tue, 27 May 2003 10:14
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how can your supra be double the limit if the limit is 92 and your car is 103.
are u actually legally aloud to have a modified exhaust???
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Registered:
April 2003
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Re: legal DB limit for 4cylinders
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Tue, 27 May 2003 10:18
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No Message Body
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Location:
Melbourne
Registered:
March 2003
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Re: legal DB limit for 4cylinders
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Tue, 27 May 2003 11:33
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3db is like twice the intensity, so from 92db to 103, well thats a lot
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: legal DB limit for 4cylinders
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Tue, 27 May 2003 11:44
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db is a logarythmic scale (spelling?)
so if you double the decebels, you're actually increasing the noise level by a LOT.
of course, most people who know this dont know another important fact: the human ear drum actually compensates for this!
if the ear drum moved in direct accordance with incrase in noise levels, we'd all break our ear drums every time a truck drove past.
the ear drum moves more as sound increases, but not in direct proportion. it's not quite logarythmic, but it's similar.
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Location:
neverland
Registered:
September 2002
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Re: legal DB limit for 4cylinders
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Tue, 27 May 2003 12:16
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hahaha i wish i got mine checked as i think it would be pretty loud with the gutts of it all missing
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Location:
Sydney
Registered:
May 2002
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Re: legal DB limit for 4cylinders
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Tue, 27 May 2003 13:09
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heh
this reminds me of my muffler detachment again
i sooo should have go it measured
Ta
Mani
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