View Single Post
J1NX3D J1NX3D is offline
Registered User
J1NX3D's Avatar
Join Date: Feb 2001
Location: Christchurch, New Zealand
Posts: 2,033
OT: Anti-boyracer laws passed in NZ,,3882-2333438,00.html,,3779-2333445,00.html

New exhaust laws put into place yesterday:
Infosheet 2.04
Date: 23 April 2003
From: Vehicle Certification Unit
Authorisation: Brent Blann, Technical Manager, Vehicle Certification Unit

No. of pages: 2
Assessing noise levels of modified exhaust systems
This Infosheet clarifies the inspection requirements for modified exhaust systems (reason for rejection number 9 in the Exhaust section of the Vehicle Inspection Requirements Manual).
The Infosheet suggests an assessment method that may be used if you are presented with a vehicle for a Warrant of Fitness inspection and you suspect the vehicle’s exhaust system has been modified and is louder than it should be (see Clarification).

Please note: An amendment to the Land Transport Act 1998 that comes into force on 2 May 2003 includes, under section 96(1B), provision for the Police to ‘green-sticker’ a vehicle that has been impounded for unauthorised street racing. With the increased focus on street racer vehicles there is also likely to be an increase in the number 'green stickered' under section 115 of the Act, for vehicle defects. One of these defects may be a noisy modified exhaust system. A vehicle that has been ‘green-stickered’ under section 96(1B) or for a noisy exhaust may only be inspected for a new warrant by a vehicle inspector who is employed by a Transport Service Delivery (TSD) Agent ( New Zealand Automobile Association Inc, On Road NZ Ltd, Vehicle Inspection New Zealand Ltd, or Vehicle Testing New Zealand Ltd).
A vehicle’s exhaust system and silencer must be effective and in good working order (required by regulation 81 of the Traffic Regulations 1976). As stated in 11-1 of the Vehicle Inspection Requirements Manual, a reason for rejection is if “the noise output is noticeably and significantly higher than should be expected for the vehicle.”
When the vehicle leaves the manufacturing plant it will have been fitted with an effective exhaust system and silencer. This is your point of reference for the performance of any replacement exhaust systems. A modified exhaust system should not make the vehicle louder than it would have been when the vehicle was manufactured with its original exhaust system.
Suggested Assessment method

1. Increase the engine speed to about half the maximum permitted limit indicated on the vehicle’s tachometer (rev counter). This is the test speed. (A ‘red line’ on the tachometer usually shows the maximum permitted limit.)
2. Hold the engine at this test speed for about five seconds and then reduce to idling speed.
3. Follow this with a series of three or four short and sharp speed increases, from idle to test speed.
If the vehicle doesn’t have a tachometer use your judgement to determine the engine speed, but follow the same test sequence.
If you suspect the vehicle’s exhaust system has been modified and the noise is louder than you’d expect from its original equipment, you should reject the vehicle.
Give the vehicle owner the LTSA leaflet “Your vehicle has failed its WoF because of a noisy exhaust” explaining why their vehicle has been rejected and what their options are for correcting the noisy exhaust.

**************Questions and answers
For warrant of fitness agents, TSDAs, and parts suppliers
Land Transport Street and Illegal Drag Racing Amendment Act 2003

On 2 May 2003 the Land Transport Street and Illegal Drag Racing Amendment Act 2003 comes into force. The Act is intended to increase the powers of Police and the Courts to deal with unauthorised street racing, drag racing, wheel spinning and other stunts involving motor vehicles on roads.

One of the provisions in the amendment gives Police the ability to put vehicles that they consider to be noisy out of service, by giving them a green sticker. This means that the vehicle must pass a new warrant of fitness test.

Because the Land Transport Safety Authority oversees warrant of fitness providers, it has been charged with ensuring that the public and warrant of fitness agents are informed about this aspect of the amendment.

Please note that nothing has changed in terms of the VIRM (the inspection manual for WoF inspectors) or the Compliance Rules, which already require agents to test for noise. What has changed is the level of authority soon to be exercised by the Police.

1. What is a noisy exhaust?
An exhaust is considered to be noisy if the effectiveness of the silencer has been reduced making the exhaust system louder than the original one fitted by the manufacturer.

2. What happens if a driver is ‘caught’ by the Police driving a vehicle with a noisy exhaust?
If a vehicle’s exhaust is considered to be louder than the original exhaust that was fitted by the manufacturer, the vehicle will be given a green sticker. Vehicles that are given a green sticker must apply for a new warrant of fitness from a Transport Service Delivery agent – the Automobile Association of NZ, On Road NZ, Vehicle Inspection NZ, or Vehicle Testing NZ. This means that a noisy exhaust must be replaced or re-modified to make it quieter and the vehicle must pass all warrant of fitness requirements before it can be driven on a road.

3. Can vehicles that have been given a green sticker because of noise be taken to any warrant of fitness testing agent?
No –vehicles that have been given a green sticker for noise must be taken to a Transport Service Delivery agent (the Automobile Association of NZ, On Road NZ, Vehicle Inspection NZ, or Vehicle Testing NZ) for warrant of fitness testing. This is consistent with the LTSA’s policy on removing stickers.

4. What if the existing warrant hasn’t run out yet?
A green sticker for noise automatically cancels the current warrant of fitness.

5. Does the amendment also apply to motorcycles?

6. What about people who have high performance cars and motorcycles, but are not ‘boy racers’?
The LTSA’s advice to them is to drive responsibility so that they are not stopped and given a green sticker. However, the noise issue applies to all vehicles, so if they have a modified exhaust and the silencer is less effective that the original exhaust, they could fail their next warrant of fitness.

7. What else is covered in the Act?
Under the Act a person must not, unless authorised by law, operate a vehicle:
· in a race or an unnecessary exhibitions of speed or acceleration
· in a manner causing it to undergo sustained loss if traction ie spinning wheels without a reasonable excuse.

Under the Act a person must not, without reasonable excuse pour or allow to spill onto the road any oil, or any other substance likely to cause a vehicle to undergo loss of traction.
'86 944S3 conversion
Old 05-01-2003, 11:59 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)