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Anyone Got A Decibel Meter That I Can Borrow

hr32gts

By hr32gts,
in Australian Capital Territory

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hr32gts Rising Star

hr32gts

Posted
Posted

I am currently contesting a fine issued to my missus whilst she was driving my skyline

They defected the car for being 110db @4500 rpm which is ridiculous

Also by law you only have to rev the car to 3200rpm for a 6 cylinder vehicle which is on the national roads and transport commission website

my car was tested in braddon by roadside police and RTA also at 4000rpm and the car was 91db only a month back

The way they are conducting the tests is false and by law is wrong

I want to borrow a meter so that I can conduct a test properly and take my report to the head of police ACT and also to the RTA themselves as the way the roadside police and Rta are testing is wrong and not correct by law

W1ngnut Proficient

W1ngnut

Posted
Posted
I am currently contesting a fine issued to my missus whilst she was driving my skyline

They defected the car for being 110db @4500 rpm which is ridiculous

Also by law you only have to rev the car to 3200rpm for a 6 cylinder vehicle which is on the national roads and transport commission website

my car was tested in braddon by roadside police and RTA also at 4000rpm and the car was 91db only a month back

The way they are conducting the tests is false and by law is wrong

I want to borrow a meter so that I can conduct a test properly and take my report to the head of police ACT and also to the RTA themselves as the way the roadside police and Rta are testing is wrong and not correct by law

I have one at work that I MAY be able to borrow. Let me know and i'll see what I can pull, may need to get you to test at my place or something one night after work.

However, just to correct you on some unfortunate facts since I've been through it before as well. The roadside tests (whilst never performed legally to the book) and all metered exhaust tests are to be conducted at 75% of ESMP (Engine Speed at Maximum Power). For an RB25 (I've only looked it up for my engine sorry), the rated RPM to measure it at is 4950rpm including stepping off the gas ubruptly to include that decel pop.

The dickson station has only ever measured at 3200 or 3400 (can't remember the exact one they did for me) and passed without issue, but the roadside, they only ever do 4100rpm+ etc because its the easiest way to get you off the road for driving an import. Which, technically is still legal since by the book it should be rated at 4950rpm.

W1ngnut Proficient

W1ngnut

Posted
Posted (edited)

http://www.ntc.gov.au/filemedia/Reports/Na...estSept2006.pdf

Still chasing up the doco I had on the ESMP of our engines, sorry.

Ok, found the PDF... http://epanote2.epa.vic.gov.au/EPA/Publica...;FILE/317.1.pdf - 2 and a bit meg in size, give it time to load.

RB20E - ESMP 5600 - 75% reading done at 4200rpm

RB25DE - ESMP 6400 - 75% reading done at 4800rpm

RB26DETT - ESMP 6800 - 75% reading done at 5100rpm

RB25DET - ESMP 6400 - 75% reading done at 4800rpm

Interestingly, cannot find RB20DET listed, which means it should be measured at 3200rpm the way I read it....

Edited by sfrizza
hr32gts Rising Star

hr32gts

Posted
  • Author
Posted

mine has the rb20de engine mine is a GTS not a GTS-T

I also downloaded the Test procedure guidelines in PDF format

which state

vehicles from 1970 to 2000

Default speed tests

Should not be higher than 90db @ the following RPM's

5 cylinders or below test @ 4000rpm

6 cylinders test @ 3200 rpm

8 cylinders test @ 3300 rpm

Above 8 cylinders @ 4300 rpm

and Rotary engines test @ 4500 rpm

That is the guideline set out by the NRTC I can send ya the PDF

W1ngnut Proficient

W1ngnut

Posted
Posted

Yes, but you are only reading what you want to read there... The guidelines specifically say that it is to be < 90db at 3/4 of ESMP UNLESS they don't know what that value is. In which case they are to do 6 cyls @ 3200rpm as a default setting.

hr32gts Rising Star

hr32gts

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All sorted ...

The Car goes in to the exhaust shop Mitchell for a new cat back section on Wednesday to hopefully Quieten the whole exhaust note a lot so the car isn't such a target

I will also keep my old cat back setup for track days as it is a nice exhaust

hr32gts Rising Star

hr32gts

Posted
  • Author
Posted

Was giving the Varex muffler option serious thought then was told by the RTA that they are infact illegal themselves so a complete catback overhaul should do the trick and shut it up

Want the car to be legal im over getting stupid fines and defects and not being able to enjoy the car for what it is ... I seriously don't have the time for the RTA/Police bullshit anymore

Somehow I keep having a feeling either my name or the cars that I drive are on some sort of police black list

Because twice now when the police have pulled up my missus driving my car they give her a lecture and keep asking her questions about me which I find to be an invasion of privacy ...

They also went right through the car searching everything when they stopped my missus I dunno what they were looking for but they didn't have my permission and I am the owner of the car , she was just the driver ...

Dunno if there is anything I can do about that by law ?

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