When Cops Test Ur Exhaust

[GRACER]

Just wondering.. when police test your exhaust.. what do they do?

i know they rev it like to 3000rpm and it has to be less than 90db

but like a few nites ago i was watching some NZ cop series.. and they did some testing on the exhaust

it sounded like the cop held it at 3000rpm.. then when they did the test... it sounded like the policeman put more throttle on it

the guy got busted for like 106db.. got a defect sticker on his car

anyone know? i'm a bit confused

[Guest trikdoutvl]

caint speak for nz, but i got pulled over before n the coppa reved the shit outta the car n then goes "dehhhh thats a bit loud son" n i said "yeh no shit its loud when u hold the accelotor flat" but he diddnt have any gadgets except his hears

wats real unfair is that harleys are a million times louder then anycar n there alud on the road

thats my vent for the day

[Modena]

Exactly... Harleys and trucks and busses are loud as anything and they are OK...

[GRACER]

  trikdoutvl said:

caint speak for nz, but i got pulled over before n the coppa reved the shit outta the car n then goes "dehhhh thats a bit loud son" n i said "yeh no shit its loud when u hold the accelotor flat" but he diddnt have any gadgets except his hears

wats real unfair is that harleys are a million times louder then anycar n there alud on the road

thats my vent for the day

another question... r motorbikes, truck & buses the same? i.e 90db? or do they have another figure?

[nuffsaid]

I've been sent a letter home from the EPA surprisingly for a reported loud exhaust, mine is pretty darn quiet. Someone must of dobbed me in.

Anyways had to go to a muffler shop and get it tested.

For a Skyline, the letter said it had to be revved to half the rev range, but mine said 4500rpm. Got it tested, all was under until the throttle was lifted at which point a couple of small pops set the reader over 90db.

[GRACER]

  nuffsaid said:

I've been sent a letter home from the EPA surprisingly for a reported loud exhaust, mine is pretty darn quiet. Someone must of dobbed me in.

Anyways had to go to a muffler shop and get it tested.

For a Skyline, the letter said it had to be revved to half the rev range, but mine said 4500rpm. Got it tested, all was under until the throttle was lifted at which point a couple of small pops set the reader over 90db.

so what happened?

did u pass?

[kcmagee]

Engineers certificates.

Problem is that anything that is non standard, i.e aftermarket, is a defect.

Harleys generally come standard, hence no defect.

[GRACER]

  kcmagee said:

Engineers certificates.

Problem is that anything that is non standard, i.e aftermarket, is a defect.

Harleys generally come standard, hence no defect.

really? so ur saying.. if nissan puts like a 6inch exhaust.. and it was stock... then it would be legal?

even if it was over 90db?

[mad082]

no. for a car to be able to be registered it has to meet ADR standards. that includes from factory.

but also motorbikes have different rules to cars, otherwise they would be in trouble for all sorts of things that apply to cars, like no number plate on the front, tyre size differences, etc.

and buses and trucks are under different rules because they aren't considered light vehicles. and the fact that you need a different licence to drive them then it is fair to say that they shouldn't have to meet the same emission laws. if you did make them meet the emissions laws then there would be twice as many as there are now as they wouldn't have the power (well torque) to carry as much as they do.

[Beer Baron]

  kcmagee said:

Harleys generally come standard, hence no defect.

that is not true. motor bikes are subject to different emissions law. as do busses.

as for NZ testing? that has no relevance for you mate if you live in sydney so don't worry about it.

[GRACER]

  mad082 said:

no. for a car to be able to be registered it has to meet ADR standards. that includes from factory.

but also motorbikes have different rules to cars, otherwise they would be in trouble for all sorts of things that apply to cars, like no number plate on the front, tyre size differences, etc.

and buses and trucks are under different rules because they aren't considered light vehicles. and the fact that you need a different licence to drive them then it is fair to say that they shouldn't have to meet the same emission laws. if you did make them meet the emissions laws then there would be twice as many as there are now as they wouldn't have the power (well torque) to carry as much as they do.

Cool Thanks mad082.. i get what u mean!!

  Beer Baron said:

that is not true. motor bikes are subject to different emissions law. as do busses.

as for NZ testing? that has no relevance for you mate if you live in sydney so don't worry about it.

haha Beer Baron.. after watching that cop show.. it just got me thinking.. coz.. isn't NZ and AUS police.. kinda the same?

anyways how does aussie cops do it?

Thanks!

[FATAZZ]

with a 3" turbo back,can you just run a cat and cannon or would that be over the 90db?

[r33cruiser]

  Quote

wats real unfair is that harleys are a million times louder then anycar n there alud on the road

thats my vent for the day

harleys are in a different class, hence different regulations. me muffler man told me that.

so stop the crying, u cant compare yourself to a bike.

no more debate on this subject...its a clear cut law, ask your muffler mate next time.

Edited January 9, 2008 by r33cruiser

[GRACER]

  r33cruiser said:

harleys are in a different class, hence different regulations. me muffler man told me that.

so stop the crying, u cant compare yourself to a bike.

no more debate on this subject...its a clear cut law, ask your muffler mate next time.

R33cruiser.. were not debating abt how bikes r louder then cars and how it's unfair..

i was just wondering about how police check db's on an exhaust.. then trikdoutvl... said how it's unfair that harleys r louder than normal cars

[a20089]

All motorcycles are tested at a higher RPM was 5000rpm or where maxium torque is made last time I checked.

All motorcycles must be manufactured to meet strick laws including the euopean DB of 89. Guess what Australia is a prinprick in sales and they don't make them lowder just for us. Last time in the ACT we were pushing for 95db across all bikes, but I think it's set to 93db or 96db for those over 20 years old (not sure on exacts here). Australian's often put aftermarket mufflers on the bikes to obtain a crisper note.

[Lunatikk]

As I understand it, there are binding circumstances that have to be adhered to when conducting a dB test as it falls under relevant Weights & Measures Legislation- I'm sure Geoff would know more.

From memory it is something like 2m behind the car & within a certain angle in relation to the tip etc at a given rpm.

They cannot simply stand there & aimlessly point a measuring device at the vehicle, rev the snot outa it & come up with a pass or more usually a fail without conducting the test correctly.

As for bikes, apart from the "look at me" wankers & the plastic gangsters on their tractors (Harleys), the main reason for having a loud pipe on a bike is so the stereotypical Aussie knob can actually HEAR when they are near a bike because the old "sorry I didn't see you" excuse for putting someone on a bike in hospital & worse happens WAY more than it ever should & simply isn't good enough.........

& before someone inevitably comes out with it, yes there are some idiots on bikes that simply shouldn't be on the road due to their conduct, lack of skill & simple dis-regard for others but that sadly is not a unique occurrence, across any given sub-culture.

/rant

[bloodzkull]

pretty sure (in qld) that it is 2/3m behind and a 45 degree angle.

[Guest trikdoutvl]

i think 1 of those dual stage mufflers is a good investment, that u got the best of both worlds. xforce make them

[MRGTR911]

Mate ive got a solution for You, I have a VERTEX Muffler which has a electronic silencer in it , in other words when the boys in blue pull you over you just press the switch and the muffler Closes Up Ive used it many times as cops have pulled me over and they had nothing on me

[Guest trikdoutvl]

nice work