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Post #1
 31st May 2011 - 04:14 PM
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I've got an xw ute.Its a clevo with a fair sized cam at about 250@50. my exhuast is is for my old motor and i think needs to go bigger but anyways its 1 3/4 tri-ys with twin 2 1/2 mandrel bent and has an x pipe and one muffler each . Cops tailgated me while driving on beaudesert rd from grenard rd to the caltex passed evans were they flashed there lights. First thing they asked me was to pop my bonnet and had i done any mods. i say' na just got a bigger cam in it'. old mate looked at me to say, what is that? So they look for a while and ask me about my filter i have on my catch can that is fed from my rocker covers. blah blah blah go back to the car grab a folder come back and look at a the folder full of defects and check my car over again. Couldnt get anything on me but reckon my breather on my catch can is not right.Then they stand at the back and ask me to start and rev my car to 2 grand ,so i do,they look at each other yell more i go 2.5 more 3. Long story short got me a minor defect. I had fair old winge the hole time as it was obvious they weren't going to let me get off free. I asked them about harleys being super loud and apparently they got seperate rules. where else besides boondal can i get my car checked for noise and what db is acceptable. Still dirty at those assholes sat on the side of the road for 40mins for nothing. aldo. -------------------- Silver fox XW ute 340hp at the treads + Toploader = Big Smiles E.T. Coming soon |
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no more holdens
Post #2
Bad news for ya bud |
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Trickassmarks
Post #3
What is the difference between a filter on the catch can and and open air filter like what came on original xw's. |
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Rancher
Post #7
Legal limit is 90DB, but this is done at 90% of your cars rev range. So, if the red line is 6 grand, they will rev it to 5 grand. Keep in mind, that the "bark" the exhaust makes when you let the throttle off, is quite loud. Motorbike and car sound laws are also very different, especially for Harleys. |
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evil_monkey_performance
Post #8
90dbl's wit a 2dbl leniency to allow for surrounding sounds so 92 dbl an i think it 1 metre back from the tail of the car at a 45degree angle at 2/3rds of the rev range. |
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blackers10
Post #9
fat pipes test cars too, then just go back to the respective cop shop and show the test and they will have a listern and say yep ok |
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LS2 VZ
Post #10
QUOTE (evil_monkey_performance @ Jun 1 2011, 04:12 PM)  90dbl's wit a 2dbl leniency to allow for surrounding sounds so 92 dbl an i think it 1 metre back from the tail of the car at a 45degree angle at 2/3rds of the rev range. and oil brether is ilegal plumb it to your intake or rocker cover It's an xw falcon...well before any emissions laws...they had breathers on their oil caps back then |
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bloodzkull
Post #11
QUOTE (Rancher @ Jun 1 2011, 03:08 PM) Legal limit is 90DB, but this is done at 90% of your cars rev range. So, if the red line is 6 grand, they will rev it to 5 grand. Keep in mind, that the "bark" the exhaust makes when you let the throttle off, is quite loud. Motorbike and car sound laws are also very different, especially for Harleys. Air filters and oil catch can breathers are very different. One is sucking in air. The other, is venting unburnt oil vapor into the air from the crank case. Hence, not being legal. When my old car was defected for too noisey exhaust. I took it to right price. They have the tools to test the Db, and give a read out, which is what cleared it for me at the cop shop. This we several years ago though. My advice. Just plumb the catch can back into one of the tapet covers, and remove the filter. It serves no purpose anyway. umm 90% of your rev range? pretty sure thats not right |
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HarleyJace
Post #13
QUOTE (Rancher @ Jun 1 2011, 03:08 PM) Legal limit is 90DB, but this is done at 90% of your cars rev range. So, if the red line is 6 grand, they will rev it to 5 grand. Keep in mind, that the "bark" the exhaust makes when you let the throttle off, is quite loud. Motorbike and car sound laws are also very different, especially for Harleys. Not so true. DB readings are different for all different cars. We got pulled over in my old mans SSV on the way to the coast, factory level is 88DB and the officer had a booklet saying you are only allowed an extra 5DB over, we ended up getting done at 95DB and let it slide because he mentioned there are only 5 officers in all of QLD (Maybe BNE?) that have DB readers in their cars. We were also told it was measured at 4500rpm from a certain distance away. Maybe this is just for newer cars? |
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Trickassmarks
Post #14
rancher shame you couldnt respond like that the first time, would have saved the site owner his time in deleting your post and editing mine. Poor form coming from a 'moderator' of you ask me. |
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^sims^
Post #15
QUOTE (Rancher @ Jun 1 2011, 03:08 PM) Motorbike and car sound laws are also very different, especially for Harleys. That really shits me. Why is that? QUOTE (HarleyJace @ Jun 1 2011, 09:08 PM) Not so true. DB readings are different for all different cars. We got pulled over in my old mans SSV on the way to the coast, factory level is 88DB and the officer had a booklet saying you are only allowed an extra 5DB over, we ended up getting done at 95DB and let it slide because he mentioned there are only 5 officers in all of QLD (Maybe BNE?) that have DB readers in their cars. We were also told it was measured at 4500rpm from a certain distance away. Maybe this is just for newer cars? The max db limit for ANY car in QLD is 90db. It does not differ between cars (except pre 1984?? cars, I think). You either misheard the cop or he told you the wrong thing. In saying that, I don't know what rev range they use to test it at. |
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HarleyJace
Post #16
QUOTE (^sims^ @ Jun 1 2011, 09:47 PM) That really shits me. Why is that? The max db limit for ANY car in QLD is 90db. It does not differ between cars (except pre 1984?? cars, I think). You either misheard the cop or he told you the wrong thing. In saying that, I don't know what rev range they use to test it at. Didn't overhear it, repetitively told us, whipped out some notepad with all the factory readings in it and the legal reading over standard. |
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wat'r
Post #17
QUOTE (Rancher @ Jun 1 2011, 03:08 PM) 1. Legal limit is 90DB, 2. but this is done at 90% of your cars rev range. 3. My advice. Just plumb the catch can back into one of the tapet covers, and remove the filter. It serves no purpose anyway. 1. Legal limit is 96db and there is no 2dB tolerance as stated in another post ( 96dB as it was made in the early 70's ) 2. 75% of range 3. You cant plumb it back to the tappet cover.... that is where it comes from!!! I would run a thin hose with restrictor back to the air filter so it looks all happy for the Police and EPA..... and have a hidden hole / outlet venting to atmosphere. ( rear of can for example at top with an internal baffle ) Use your imagination.... 20 ways around everything. |
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Rancher
Post #19
QUOTE (^sims^ @ Jun 1 2011, 09:47 PM) That really shits me. Why is that? The max db limit for ANY car in QLD is 90db. It does not differ between cars (except pre 1984?? cars, I think). You either misheard the cop or he told you the wrong thing. In saying that, I don't know what rev range they use to test it at. QUOTE (wat'r @ Jun 1 2011, 10:31 PM) 1. Legal limit is 96db and there is no 2dB tolerance as stated in another post ( 96dB as it was made in the early 70's ) 2. 75% of range 3. You cant plumb it back to the tappet cover.... that is where it comes from!!! I would run a thin hose with restrictor back to the air filter so it looks all happy for the Police and EPA..... and have a hidden hole / outlet venting to atmosphere. ( rear of can for example at top with an internal baffle ) Use your imagination.... 20 ways around everything. Harley's pass noise pollution laws because standard, their pipes produce under the DB levels at the required RPM. If a bike gets pulled over, on the headstock of the frame, there is a plate saying it is however loud @ whatever RPM (3000 maybe) Police set their equipment up the right distance away, and test the bike. Catch is though that most Harley's don't have an RPM guage...... 1: Legal limit is 90dB for current cars. 96dB is far from what it is, if this were true. I wouldn't have been fined twice for it. 2: I had already corrected myself, please read the rest of the thread. |
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bloodzkull
Post #20
QUOTE (^sims^ @ Jun 1 2011, 09:47 PM) That really shits me. Why is that? because loud pipes save lives. most harley's are bullshit loud and sound crap though |
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71-BEETLE-SEDAN
Post #22
I think you will also find that rear engined vehicles and motor bikes come under a different category due to the fact that there isn't anywhere for the exhaust to go. Like for example a VW Beetles motor is right near the back of the car, and for it to have the same length and sized mufflers for other small motored cars the exhaust would have to travel forward of the motor before heading out the back, making it not practical. The same goes for motor bikes. But i think this is only in nsw. |
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wat'r
Post #23
QUOTE (Rancher @ Jun 2 2011, 05:07 AM) 1: Legal limit is 90dB for current cars. 96dB is far from what it is, if this were true. I wouldn't have been fined twice for it. 2: I had already corrected myself, please read the rest of the thread. 1. For vehicles certified prior to ADR 83/00, Schedule 1 of the Regulation specifies the prescribed noise levels. For cars built before January 1983, the maximum noise level is 96 decibels and for newer cars the level is 90 decibels. Old Falcon....96dB 2. I was just affirming this since so many posters on this forum write down wrong information 
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Shadow Of A Doubt
Post #25
QUOTE (LS2 VZ @ Jun 1 2011, 04:44 PM) It's an xw falcon...well before any emissions laws...they had breathers on their oil caps back then This. I thought, before the emission laws came into effect, if you car was built before then, the laws didn't apply. And when the laws got tighter, if you car was built before that new standard, it would only be applicable to the old laws. And, it's a 351 Clevo, an XW, surly it would have a louder DB law then cars now days? EDIT: Nevermind. Already sorted. Haha. |
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Trickassmarks
Post #26
Whent down to c.e.s got my test done........106db lol, sounds sick though |
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wat'r
Post #27
QUOTE (Trickassmarks @ Jun 3 2011, 02:25 PM) Whent down to c.e.s got my test done........106db lol, sounds sick though he tested it at a 45 deg angle at 30 odd cm away, at 3k. Getting some bigger mufflers installed at a cirtificate wriiten up. 2 new mufflers, flange plates put in $500. Word of advice done ever use performance pipes acacia ridge. C.e.s pointed out some less than desirable work, that coupled with my own experience, i wont step foot in there again if i have to. Sigh... Testing standards are everywhere online. They clearly give the setup. It is 200mm off the ground, 500 mm away at 45 degrees.... not 30cm ish. It makes a difference. You would definately still be over.... but it may only a tad over 100dB. 5 or 6dB is a good head start
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HP Plod
Post #30
Ok, |
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