exhaust noise finale

[bluemaumau]

i see on the news tonight that a set limit has now been introduced.

95db is the limit, it got me thinking.......

how do they measure that?


obviously with somesort of testing equipment - but i mean like when do they test it?

>idle
>3000rpm
>limiter

?
its really buzing me out.

i dont want a muppet sitting on limiter for a few minutes while he tests the noise level!

so any got some more info?

[Al]

Stolen from NZPC

1. The limit for cars is 95dbA

2. Tests carried out at 4000rpm for engines 5-cylinder and smaller, 4500rpm for rotary engines, 4800rpm for (DOHC only) VTEC/MIVEC/VVT engines under 5-cylinder, 3200rpm for 6-cylinder, 3000rpm for 8-cylinder, 2500rpm for diesel engines.

3. Unfortunately the test does includes the de-acceleration, so engines will be held at the appropirate RPM based on engine type and then released so the revs fall to idle.

3. Exhaust systems that are tested will be photographed and their specifications (size, length etc...) noted.

4. Aluminium 'PASS' stickers will be attached to the rear muffler if the vehicle passes.

5. Vehicles with mid-mounted, rear mounted engines get a +4dBA tolerance (so 99dBA limit)

6. Motorsport vehicles to which the owner is a member of a recognised motorsport club and the vehicle has an authority card and logbook get a +2dBA tolerance (97dBA limit)

[Jebus]

sif having a gay sticker on my muffler

[dougsop]

LOL revenue Gaining ~ stupid police and labour ~

this is rather bullshit i m sure some bike out there with factory exhaust will go over the 95db.

so is this really abt noise pollution OR pure revenue gaining ?

so they can spend more money on the million $$ security system which opperate fr 8-5 haha

[Al]

this is rather bullshit i m sure some bike out there with factory exhaust will go over the 95db.

The test is for modified exhausts.

[dougsop]

ya i kwno thats wat i mean by revenus gaining, not really considering about nosie polution LOl

[escortman]

i cant see the reason behind charging 100 buk for the test, the testing machine cant cost that much nor could the metal sticker or wateva it is

[snwtoy]

Why the $&#$% is the RPM set lower for bigger engines???

[IH8TEC]

they are fukwits, seriously, if they are going to do it just for modified exhausts they should bloody well do it for all, alot of std cars exhausts will be louder than that, becuase anyone else actually seen those machines work? becuase when they test them 95db is so quiet, some people in politics need to get their heads out of their asses and be realistic, dont get me started on harleys either

end of my rant about the dumb ass old fogies who bitch about it all day long because they have nothing better to do. oh my exhuast is quiet so i'm not worried, jsut pisses me off

[Al]

At last we have a set limit, one thats inline with motorsport limits as well and people still whinge. FFS.

[FXGTV]

And whats with having only 9 testing stations? I find it hard to find time to take my car to get a wof let alone taking it to get tested for exhaust In saying that i havn't got my fx with the bling cannon anymore, and my aw11 is uber quiet

New Zealand is going to the preverbial pc dogs - microchips and all

[Al]

And whats with having only 9 testing stations? I find it hard to find time to take my car to get a wof let alone taking it to get tested for exhaust

You only have to get it tested if you get pulled up for being a noisy hoodrat.

[fuel]

Hah. Mine's a 6 cylinder, but MIVEC as well.. does that mean the 3200rpm still applies? Oh well, I don't think it will affect me anyway.

[snwtoy]

At last we have a set limit, one thats inline with motorsport limits as well and people still whinge. FFS.

This law doesn't even affect me (hopefully) as my exhaust is standard. But how bloody hard is it to pay an expert on noise a couple of grand to draft a fair, consistant, sensible, and enforceable regulation? Too difficult it seems.

Which motorsport limits are you referring to?

Droopy tip exhaust anyone? Quick before they make those illegal too.

[Lloyd]

The law is only for newly imported vehicles for now as legislation only came in today. The legislation for all vehicles will be likely in within 6 months.

Bikes are to be 100 from memory

There are vehicles over the limit already from factory, but those are factory and wont be counted. Modified exhausts are the target

There are specially defined standard as to the measuring process which is averaging around the $150 mark from the sounds of it. For that the exhaust system gets components measured, exhaust system photographed, detailed certificate of the exhaust system to carry in the vehicle and exhaust details on a small plate near the rear of the exhaust which will also have a serial number matching the certificate in the vehicle to prevent changing it after certification check.

The current WoF testing will remain as "noticebly or significantly louder than factory" being a fail. You have the option of either taking it to a certified and getting it certified as being alright (not likely if its failed the warrent) or fixing the problem.

Also likely that police will be doing their usual roundups on the weekends with handheld meters to determine a rough idea of how loud it is and if there is doubt about the legality then getting it check.

VTNZ also have light meters (well, down here anyway) for checking levels of tint so expect to be pulled up for that soon if its not legal. $10 charge and you can get a certificate (paper) for that too.

[Kender]

At last we have a set limit, one thats inline with motorsport limits as well and people still whinge. FFS.

Which motorsport limits are you referring to?

The decibel limit for race cars at Ruapuna Raceway is set at 95db. I believe it's the same at other circuits as well. The decibel reading at Ruapuna is also taken on a straight while the cars are under full acceleration. This test for road cars is taken at constant throttle (which will help you keep under the limit )

IMHO, this law sounds fair as there's no need for ANY street car to have a louder exhaust than a race car. NO excuses.

[rolla_fxgt]

Maybe they might want to educate the cops before they blanketly send everyone thats over the limit with a susspected non factory exhaust to get it tested. I got pulled over the other day & the officer told me my exhaust might fail the new law cause he thought it was near the limit & its non factory. He wouldnt believe me that fxgt's & gtapex levins came out with twin pipes, something about his daughters didnt have twin pipes so mine shouldnt have. I just laughed at him.

But in my view 95db is fair enough. I hope they set that limit for trucks, motorbikes, trains, & busses etc.
It should be the same for all so its fair, even dare i say it harelys. I know most of them would fail

i guess its set lower for bigger cars, since they are generally owned by older people & not boy racers.

[Lloyd]

The buses and cars came out factory like that, hence they aren't supposed to be ruled by the limit. Likewise with Harleys, Clubsports and the XR6/8/whatever.

Its more to control noise in places where noise isn't wanted, such as residential areas in the middle of the night (where you would more likely find a passenger vehicle than a bus or a truck).

Seems like its reasonably sensible for now. Just have to wait and see how it all works out.

If you've got a modified exhaust and dont drive it like you stole it then chances are its not even going to be that loud.

[Dell'Orto]

But the thing is here, previously cops could do you for having a loud exhaust at their discretion, now there is a firm limit.
If you've got a big bling cannon at the end of your exhaust and get pinged once, get it tested and have the sticker, and you'll be set permanently.

[dougsop]

factory car no limit, which in my way i will say u pay more money u get more respect