Stock jdc2r exhaust doesnt pass NOISE test!!

[dslt]

Hey guys, Just got my car noise tested today and it did not pass for some reason. Completely stock jdc2r exhaust no leaks or rust. I got 91db at 5500rpm then 96db on back off at 5925rpm. Is this possible? I told the guy it was no way possible to not pass, and he said a 30k machine does not lie..
So i cracked it, left and then got a dodggy one. Made my day =)

Has anyone experienced the same thing, please let me know

cheers guys

[teaseR]

LOL thats funny ass!!!

[dslt]

tell me about it! Completely STOCk! =Þ

[Limbo]

it all depends on what the rest of the system is made of not just the exhaust. WHat headers, cat and reasonator are you running?

[dslt]

96 type r, completely stock from factory =)

[dc2dc2dc2]

lol wtf
pwn3d
time to put on full ek1 exhaust.

[SHIFTY]

they cant do shit if its stock.. tell them 2 go fck themselfs :)

[gambate]

they cant do shit if its stock.. tell them 2 go fck themselfs :)

i dont think they give a sh*t. it isnt their car that failed noise test

[xntrik]

are you sure nothings leaking/bent?

[bennjamin]

Also remeber that it is a JDM exhaust ~ Im sure if you changed to a AUDM ITR exhaust + muffler it would clear the requirements.

[dslt]

yups absolutely no leaks/ or bents, They were quite shocked themselves. There was no noise at 5500rpm but at 5925 when he backed off the throttle. It made a horrible sound, i think thats what made it 96db.

[45SET]

time for a new exhuast by the sounds of it...

I love it when you can justify spending money on your car because something is "broken" :p

[dsp26]

i had the same probs mate.. 91dB then 97dB on throttle off... it's coz the oem muffler was foobarred.... made that tinny raspy buzzing noise on back-off...

and bennjamin is right about the exhaust.

the way it was explained to me was that Honda has to give the ADR people the exact testing conditions what the results should be... JDM exhaust will not pass... from all accounts EG/DC should be well under 90dB

[ricki_kalsi]

Curious... what do the Spoon N1's make around about (I know different headers etc make a difference) on throttle, and then Back off on a B18C.

[tinkerbell]

probly doing the test wrong!

dsp - where is that link!!!!

[Hullabaloo]

I have a copy of the National Stationary Exhaust Noise Test Procedures for In-Service Motor Vehicles Septemper 2006. The report is prepared by National Transport Commission on behalf of the Land Trasport Environment Committee.

ISBN : 1 921168 50 1

It details a lot of test conditions, but in particular i've cut and pasted important parts of the rev test part, as you said they tested to 5925rpm. I'm not sure if you're running a jdm dc2r or an audm dc2r with a jdm dc2r exhaust as the test rpm may differ as the different engines may develop max power at a different rpm.


1. DEFINITIONS
1.2 "Engine Speed at Maximum Power" ("ESMP") means the speed at which the engine develops maximum power (rpm).


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 ... 3200 (pre 1995) or 3600 (post 1995)
(iii) 8 cylinders ... 3300 (pre 1995) or 3900 (post 1995)
(iv) more than 8 cylinders - 4300 rpm
(v) If the engine is a rotary engine - 4500 rpm

4.2.3.4 Where, in the opinion of the testing officer, the test speed determined by reference to the above is not attainable by the engine then at the maximum

if you determine that the test rpm for your car is lower than 5925 then maybe you can ask for a retest and maybe you'll pass at that rpm.

[PaZzMaN-R]

Curious... what do the Spoon N1's make around about (I know different headers etc make a difference) on throttle, and then Back off on a B18C.

spoon website quote the n1 exaust at 110db. does not give a reading to rpm or mods of if its just the muffler or what MAING!

[IEVAQ8]

it may be that the cat is worn.bashed, or just old and guttered and not holding enough back..................as long as you cleared the epa...........dont worry

[dsp26]

dsp - where is that link!!!!

link of?

[tinkerbell]

link of what hullabloo posted, that i posted for you to read when you failed your test?

http://www.ntc.gov.au/filemedia/Reports/NatStatExhaustNoiseTestSept2006.pdf

[dsp26]

link of what hullabloo posted, that i posted for you to read when you failed your test?

http://www.ntc.gov.au/filemedia/Reports/NatStatExhaustNoiseTestSept2006.pdf

oh.. thanks.. i hadn't visited the other thread in a while n didn't notice ur post...

just read it, specifically section 4, they pretty much followed the guides from my observation... only thing is the whole 5700rpm thing... it was clearly printed on my notice and was apparently a figure provided by Honda for that vehicle/engine...

I have now saved a copy of the doco though for future use so thanks to both of you!! even though i have the stock muffler on now, i plan to put an itr one on which i hope isn't too different, however i still believe i was reported for my vtec/induction noise misconceived as exhaust noise...