At what RPM do EPA test the exhaust note?

[whistla]

As the topic suggests...

I know theres some procedure they use to measure the noise level

90dB at 1meter back @ 45degree angle to the exhaust @ X-RPM

or SOMETHING along those lines, does anyone know?

just got a dB measure at home at registered 84dB on idle, but im aware they dont measure the noise at idle

thanx in advanced

[predator]

3200rpm

Yer, i gotta check mine for same reasons...

f.ucking cops wasting the EPA's time

[meggala]

I think its 75% of redline as indicated no 100% on that though

cheers

[whistla]

Thanx guys...

Ahh well, ill post back after the test on Wednesday and tell you all...

*sigh* Driving around practically stock is so deperessing

It so quiet and boring

[inark]

id hate to think what my gfs soarers DB reading is.... i broke the silencer, does anyone know how much they are?

[Guest INASNT]

they tested mine at 5000rpm which is 75% of the power band!

[Guest RedLineGTR]

Originally posted by inark

id hate to think what my gfs soarers DB reading is.... i broke the silencer, does anyone know how much they are?

Bout $80 depends where you get em from..

[aybee]

i was told 75% too

[whistla]

aiight, sweet....thanx guys!

Was hoping youd answer Inasnt, knew u recently went

thanx again

[Guest INASNT]

Originally posted by aybee

i was told 75% too

i was there at mcloud when they did mine! 83db at 5000rpm with stock exhaust which was on the car 1 day before the test and came off 30mins after the test

[predator]

Well thats where i gotta go too so i guess i better check it at 5000rpm b4 i go. Its bullshit - unless u have a stock exhaust you're basically over. Waste of my time.

[Guest INASNT]

Originally posted by predator666

Well thats where i gotta go too so i guess i better check it at 5000rpm b4 i go. Its bullshit  - unless u have a stock exhaust you're basically over. Waste of my time.

just do what i did and bolt on the stock exhaust for the test, it can be done in about 20 mins

[whistla]

thats what im worried about now!!

i had a pretty sedate twin pipe (3" in 2x2"out) and it was pretty quiet, but eventually i opted for a bigger muffler

now iv put the old custom twin pipe back on and if inasnt is saying he got 83dB on a STOCK muffler (which is only 7dB away from limi), i think im screwed!

got a dB tester here, but i cant exactly rev the car and measure the back of it at the same time

have to wait till later tonight

[Guest INASNT]

just put ronin09's stock cat back system on, that thing has so many bends that it will quiet down any system

[whistla]

well see tonight after the preliminary tests :S

its not looking good, had to take a fair amount of sh|t off the car already

only leaves me tomorrow (possibly wednesday before the 11am test) to get it done

this couldnt have come at a worse time (exam period)

[Guest INASNT]

u can always get it checked at an exhaust shop befre the test!

coz those handheld db testers aint that accurate unless its been clibrated recently

[whistla]

this one is pretty spot on id say...

its my bros mates, his into that sort of crap and is worth a mint from what he tells me

*shrugs* im taking his word on this

[predator]

There is a list on the EPA site of approved testers -> http://www.epa.vic.gov.au/noise/testers.asp

Any1 know how much these places charge for the basic test?

Apparently there is www.techrentals.com.au where you can hire all that engineering geeky stuff like noise meters as well.

Yes, its screwed how you *have* to turn up at the appointed time or else you get fined $1000 - i gotta take a few hours of work just so i can pass and stick everything back on I mean its such a pointless system for tuned imports, parts go off, pass test, parts go back on again.

[Guest RedLineGTR]

well thats how it's gonna be unless an importer get to be president...lolz

[JET-33]

few diff ways ive heard, one of them is a percentage of redline, another was at 4200 in 3rd (but thetd need a dyno and i dont know if they have 1), maybe 420 in neutral, and the other is they let it idle high and give it a few squirts and c...