exhaust db

[veeteecommo]

just wondering if any one knows the legal db sound limit for a vt?
and at what revs?

[SSbeast]

There's no specifc Db rating for any one partiular vehicle it's a Db rating across the board. I belive its 98db is the loudest. I think they get you to hold ur RPM at 3000 for 5secs and take a reading.

[kniever]

There's no specifc Db rating for any one partiular vehicle it's a Db rating across the board. I belive its 98db is the loudest. I think they get you to hold ur RPM at 3000 for 5secs and take a reading.

incorrect, i just had to get my vn tested cos i got a letter from the epa stating it was too loud.

the limit is,
b4 1983 is 96db
after 1983 is 90db
and it is tested at 3300rpm

i got it tested with the exhaust that was on it and it read 101db then i went to the wreckers and got a stock exhaust and went back and it read 81db so i passed it with flying colours

[235rwkw]

incorrect, i just had to get my vn tested cos i got a letter from the epa stating it was too loud.

the limit is,
b4 1983 is 96db
after 1983 is 90db
and it is tested at 3300rpm

i got it tested with the exhaust that was on it and it read 101db then i went to the wreckers and got a stock exhaust and went back and it read 81db so i passed it with flying colours

RPM depends on engine size and where the engine makes it max power. a v8 is closer to 4,000 rpm.

90 is way to quite. only a stock system will pass that.

mine is 80 db at idle. over 103 db at 2,000 rpm. i have a meter.

played with it last night

my air porting tool, 100 db
car door shut 72 db
rangehood fan 70 db
microwave door shut 80 db
toilet flush 83 db

[Tony.]

No I'm pretty sure he's right..

DECC | Managing noise from vehicles

[235rwkw]

no i'm right. its 3/4 of where you make max power. if they don't know that then they use a guide.

Here is the national exhaust test procedure, have a read..

http://www.ntc.gov.au/filemedia/Repo...stSept2006.pdf

[kniever]

RPM depends on engine size and where the engine makes it max power. a v8 is closer to 4,000 rpm.

90 is way to quite. only a stock system will pass that.

mine is 80 db at idle. over 103 db at 2,000 rpm. i have a meter.

played with it last night

my air porting tool, 100 db
car door shut 72 db
rangehood fan 70 db
microwave door shut 80 db
toilet flush 83 db

lol mate, what i wrote is correct, as i said the epa got onto me as my car was too loud and when i was getting tested the bloke said most cars are 3300rpm

[minux]

lol mate, what i wrote is correct, as i said the epa got onto me as my car was too loud and when i was getting tested the bloke said most cars are 3300rpm

Just in case you failed to read any document:

4.2.3 The engine of the vehicle under test shall be operated in accordance with one of the
following procedures:
4.2.3.1 Where the ESMP for that engine has been determined by the testing authority
the engine shall be brought to and stabilised at a speed as close as the testing
officer can achieve to:
(i) ½ ESMP in the case of a pre ADR83 motor cycle
(ii) ½ ESMP in the case of any other motor cycle where the ESMP is
more than 5000 rpm; or
(iii) ¾ ESMP in the case of any other vehicle.
4.2.3.2 Where the engine speed has been governed by the manufacturer and ¾ ESMP
cannot be achieved, the test speed shall be 5% below the maximum governed
speed.
4.2.3.3 Where the ESMP for that engine has not been determined by the testing
authority then the engine shall be brought to and stabilised at a speed as close
as the testing officer can achieve to one of the following speeds:
In the case of a passenger car or derivative, if the engine has:
(i) 5 cylinders or less 4000 rpm
(ii) 6 cylinders and is
manufactured before 1995 3200 rpm
manufactured in 1995 or later 3600 rpm
(iii) 8 cylinders and is
manufactured before 2000 3300 rpm
manufactured in 2000 or later 3900 rpm
(iv) more than 8 cylinders 4300 rpm
(v) If the engine is a rotary engine 4500 rpm

[kniever]

i was just going by the EPA approved tester that tested my car and looking at that the 3300rpm for my car was correct so 235rwkw was still wrong and the db limit that i wrote in my other post is correct

[danja]

I still can't believe how pretty much every motorbike on the road is loud as **** and no one seems to care?!

[veeteecommo]

i knooooowwwwwww i had one drive past me the other day annd he just booted past me managed too hear his exhaust of over 2 subs and the volume up reallly high!

[fitz_vt]

i knooooowwwwwww i had one drive past me the other day annd he just booted past me managed too hear his exhaust of over 2 subs and the volume up reallly high!

ha ha ha i had some little punk with a 4 cylinder pull up next to me and i was driving my mates VN he had brought it to me for a sparky change (2 subs alpine system) up full and i could hear this 4 cylinders exhuast over the stereo.

[235rwkw]

OK your right for your car sort of, it 3200..

but this is VT VX section most are after 1995/2000, so higher

[Tony.]

i was talking more about the dB limit rather than the RPM.. anyways I'm out of this cause I can tell it's only going to get worse.

[kniever]

OK your right for your car sort of, it 3200..

but this is VT VX section most are after 1995/2000, so higher

lol still wrong-(iii) 8 cylinders and is
manufactured before 2000, 3300 rpm



it doesnt matter if it is vt/x section, tony asked the db limit so i told him as i just had to find out the hard way, you were turning it into something else.

[veeteecommo]

hmmmmmmmmmmmmmmm

[235rwkw]

lol still wrong-(iii) 8 cylinders and is
manufactured before 2000, 3300 rpm



it doesnt matter if it is vt/x section, tony asked the db limit so i told him as i just had to find out the hard way, you were turning it into something else.

sorry assumed was a v6

[kniever]

sorry assumed was a v6

no probs, where'd ya get ya db reader from anyways? i wouldnt mind having one myself

[Johnsy]

What annoys me is some harleys go past and they are that fvcking loud you cant even hear yourself think... how do they get away with that ?

[kniever]

cos if its a harley most cops will leave them alone lol, but a few fella's i know with harleys have had to change the exhaust but the always put the loud one back on

[commsirac]

Motorcycles have the same noise levels as cars? the legal regs would need to 150dB if one of my neighbours bike was to be legal!
Where can we find the regs on the actual noise levels allowed, couldnt find anything in my searches?

and look at what I did find in regard to testing rpm:
In the case of a motor cycle:
(i) for a two-stroke engine 3750 rpm
(ii) for a four-stroke engine:
from Harley Davidson 2500 rpm
from any other manufacturer 3000 rpm

why compensation for having a Harley motor? even the rule makers are scared of dimwits on Harleys?

The test should be done at three quarter throttle.....not 3/4 rpm in neutral!, but then they'd have to have some type or rolling road etc. The noise when a car or bike is accelerating hard can be many times over the basic 90dB that has been mentioned.

[kniever]

yeh ive got the limits here for motorbikes to somewhere but i have to find it, i will post it up when i do

[Tony.]

lol still wrong-(iii) 8 cylinders and is
manufactured before 2000, 3300 rpm



it doesnt matter if it is vt/x section, tony asked the db limit so i told him as i just had to find out the hard way, you were turning it into something else.

Pretty sure I wasn't the one asking. Lol.

[235rwkw]

no probs, where'd ya get ya db reader from anyways? i wouldnt mind having one myself

not sure, borrowed it from work, used to check machine noise.

[gazzabrizz]

i got pulled over by cops for speeding they booked me and put noise limit on my vt clubbie . it was 95 db. they said it had to be under 90db at 4000 rpm which they measure 1/2 metre away from tip of exhaust . this is in queensland and the coppers pulled out a book with all the required readings for the cars . ....but what reallly gets me is my hsv is a auto and for me to get to 4000 rpm in any gear id be well and trully over speed limit . so i have 2mths to fix and take to transport dept to check .