Exhaust Noise Test For Epa

[GUN_METAL_GTR32]

hay guys i got an epa in the mail for my r34 gtt

its pretty stock with a cooler and pod filter.

at the exhaust noise test it blew a 98db in its pretty much factory state. . . . y????

i now have to get him to make me a smaller muffled ststem to make it quiter and its costing me money i dont have.

just wanted to vent really

[neo32]

what they can just send u a random epa notice in the mail?

[nuffsaid]

I've had the same happen, I have a feeling someone dobbed me in (im in NSW)

[R31Nismoid]

If you have a stock exhaust, there is NO way its 98dB

Did you go to an approved tester, with a calibrated machine?

[GUN_METAL_GTR32]

what they can just send u a random epa notice in the mail?

yes they can its happened to me twice now, once for my supra na and now the 34, the supra however was f**king loud lol. na with extractors and a straight 3 inch pipi no cat and 4 inch muffler

[brentos]

Im a bit worried now, my 3.5" exhaust is probably way too loud too. Does that mean somebody in my street can ring the EPA and dop it in?? Is it that easy?? or does law inforcement have to hear it then send a letter in the mail?? Man we have a nation of winge bags don't we!

[R31Nismoid]

Law enforcement just have to suspect you are over.

There is a thread in the Vic section detailing it all

[GUN_METAL_GTR32]

If you have a stock exhaust, there is NO way its 98dB

Did you go to an approved tester, with a calibrated machine?

my exhaust is stock buddy trust me my best mate has his own workshop and when we did the cooler it was on the hoist and i checked out the exhaust taking measurement for when i do my custom exhaust (was supposed to be tomorrow night but i have to move it till i get this shit cleared) and it is definately stock, it has the cat in place from compliance and the little twin pipe thing into the muffler where u can change to sport mode and quiet mode or something.

i took it to daalder exhaust in preston they were on the list from the epa and my friend went there himself to get his cleared a little while ago.

[GUN_METAL_GTR32]

Im a bit worried now, my 3.5" exhaust is probably way too loud too. Does that mean somebody in my street can ring the EPA and dop it in?? Is it that easy?? or does law inforcement have to hear it then send a letter in the mail?? Man we have a nation of winge bags don't we!

yeah u have to be seen by the jacks. funny thing was i got seen on collins street city at 1.30 pm so lunch time on a street that is bumper to bumper traffic all day plus they are doing renovations at australia on collins and there is the guy there everyday with the yellow "slow" sign all day long so i couldnt go past about 15 kms i drive there twice a week and its like that every day

[R31Nismoid]

my exhaust is stock buddy trust me my best mate has his own workshop and when we did the cooler it was on the hoist and i checked out the exhaust taking measurement for when i do my custom exhaust (was supposed to be tomorrow night but i have to move it till i get this shit cleared) and it is definately stock, it has the cat in place from compliance and the little twin pipe thing into the muffler where u can change to sport mode and quiet mode or something.

i took it to daalder exhaust in preston they were on the list from the epa and my friend went there himself to get his cleared a little while ago.

I reckon they fked it mate.

There is no way on EARTH a stock GT-T exhaust is 98dB.

My 3" exhaust, single muffler, was 98-100dB

And my current 3.5" exhaust, cat, mufflers is right on the limit. Ive had more EPA's than i'll ever need, so have many friends, and 98dB is no cat/small single muffler... 3-3.5" exhaust... not a stock item pulling that much.

So either the meter is faulty, or they conducted the test wrong. 98dB is so far outta the ballpark for a stock exhaust its not funny.

GTR's have a hard time passing with aftermarket dumps & stock exhaust... but a GT-t - no chance. Even some of the Jap aftermarket exhausts (3") are 90-93dB

What's this business about quiet/sport mode??? There is more to the story if you say its stock... you sure the mufflers still have their insides?

For the record, ive never been a fan of Daalder in Preston or Box Hill... Take it to the tester in Lilydale... its a drive, but at least he tests it in the open, no buildings/cars/traffic around and so on that can 'trip' the meter

[WRRR]

I would suggest you jump on the net and have a read of the ADRs for noise.

The test procedure is very specific on where the reading should be taken, ground conditions, buildings, rev range, ...

I suspect the guys you have gone to have botched one or more parameters.

[GUN_METAL_GTR32]

I reckon they fked it mate.

There is no way on EARTH a stock GT-T exhaust is 98dB.

My 3" exhaust, single muffler, was 98-100dB

And my current 3.5" exhaust, cat, mufflers is right on the limit. Ive had more EPA's than i'll ever need, so have many friends, and 98dB is no cat/small single muffler... 3-3.5" exhaust... not a stock item pulling that much.

So either the meter is faulty, or they conducted the test wrong. 98dB is so far outta the ballpark for a stock exhaust its not funny.

GTR's have a hard time passing with aftermarket dumps & stock exhaust... but a GT-t - no chance. Even some of the Jap aftermarket exhausts (3") are 90-93dB

What's this business about quiet/sport mode??? There is more to the story if you say its stock... you sure the mufflers still have their insides?

For the record, ive never been a fan of Daalder in Preston or Box Hill... Take it to the tester in Lilydale... its a drive, but at least he tests it in the open, no buildings/cars/traffic around and so on that can 'trip' the meter

he did test it in the open, it was outside in the carpark area at 9.30 am very little traffic, and he did it like 3 or 4 times.

in reference to ur quiet/sport mode question my 34 has a swith under the dash from factory to make the exhast go louder or quieter by directing the exhaust gas into either side of the muffler (one is fatter and one is skinner)

lilydale is a big drive for me but it might be worth it i guess because my car is not really loud at all

[GUN_METAL_GTR32]

I would suggest you jump on the net and have a read of the ADRs for noise.

The test procedure is very specific on where the reading should be taken, ground conditions, buildings, rev range, ...

I suspect the guys you have gone to have botched one or more parameters.

well he did it outside with a little microphone thing and he had this v shaped ruler type thing which he touched to the end of my muffler and put the microphone at a bit of an angle to the muffler when he did it.

at 5000rpm it did 98db and at 4000 rpm it did 91 db

[Haines]

mine has done 92db at 5000rpm

with no cat 3" turbo back exhaust and a bigger turbo

did you have any doof doof pumping at the same time ??

[GUN_METAL_GTR32]

mine has done 92db at 5000rpm

with no cat 3" turbo back exhaust and a bigger turbo

did you have any doof doof pumping at the same time ??

no i still have the standard stereo i spend all my money on handling lol. hardly even listen to the stereo.

[R31Nismoid]

There is something wrong here still

I don't know what it is, but there is no way you have 98dB factory exhaust.

Its as simple as that.

[GUN_METAL_GTR32]

There is something wrong here still

I don't know what it is, but there is no way you have 98dB factory exhaust.

Its as simple as that.

bro, i can only tell u what the guy told me, i also stood over his shoulder just incase he was trying be a dicey f**ker but he angled the meter thingy to show and said watch the little red light thing as it goes up and the numbers are on the side. by 4000rpm it was over.

im putting a smaller muffler on ther going to get it tested again thursday morning (hopefully it will pass) and then ill be making my new 3inch exhaust over the weekend.

its all a little bit confusing to me lol

Edited March 31, 2009 by GUN_METAL_GTR32

[R.3.2.G.T.R]

what was rev limit is your car supposed to be tested at?? 5000rpm?? i know my 32R was tested at 5000rpm, which initially i thought was high, so rang EPA up and they confirmed, i think its linked by where tacho limiter is (8000rpm) and some fraction of that, but i would have thought GTT would be at a lower rev

[R31Nismoid]

RB26 - 5100rpm

RB25 - 4900rpm

RB20 - 4700 or 4500rpm (i think, don't quote me on that one)

bro, i can only tell u what the guy told me, i also stood over his shoulder just incase he was trying be a dicey f**ker but he angled the meter thingy to show and said watch the little red light thing as it goes up and the numbers are on the side. by 4000rpm it was over.

im putting a smaller muffler on ther going to get it tested again thursday morning (hopefully it will pass) and then ill be making my new 3inch exhaust over the weekend.

its all a little bit confusing to me lol

Can you get a picture of the one that's on there now perhaps so we can confirm if its factory????

[GUN_METAL_GTR32]

RB26 - 5100rpm

RB25 - 4900rpm

RB20 - 4700 or 4500rpm (i think, don't quote me on that one)

Can you get a picture of the one that's on there now perhaps so we can confirm if its factory????

my gf broke my camera so i couldnt get a hold of a new one till like the week end but my new exhaust will be started by then ill take a before and after pic or something

im going home now lol