MK5 Golf GTI
General => Random Chat => Topic started by: QD MBE on March 13, 2011, 04:44:19 pm
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Over on the dark side.
http://www.golfgtiforum.co.uk/index.php?topic=186060.0 (http://www.golfgtiforum.co.uk/index.php?topic=186060.0)
Sign of things to come?
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This line:
Exhaust noise is clearly in excess of that emitted by a similar vehicle fitted with a standard silencer in average condition
is the line to worry about I think. However, is that a quote from the MOT station? I thought that they simply measured sound levels rather than spend time looking up comparisons and that not exceeding the decibel threshold was all that mattered. That line is open to so much interpretation and even debate.
As my friend Khare says, do MOT stations even have decibel readers? Or is this very new?
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This line:
Exhaust noise is clearly in excess of that emitted by a similar vehicle fitted with a standard silencer in average condition
is the line to worry about I think. However, is that a quote from the MOT station? I thought that they simply measured sound levels rather than spend time looking up comparisons and that not exceeding the decibel threshold was all that mattered. That line is open to so much interpretation and even debate.
As my friend Khare says, do MOT stations even have decibel readers? Or is this very new?
My close friend runs an MOT centre, and doesnt have one robin.
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If they don't have the equipment, how can they fail it? :confused: It is just "their opinion"
Next they will be saying that the lights emit too much light when compared with a car fitted with standard lightbulbs! :fighting:
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i was failed on a magic tree hanging from the center mirror last year, :stupid:
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i was failed on a magic tree hanging from the center mirror last year, :stupid:
....Yes but the reasoning behind that is that it partially obscures your view while driving. Easy to remove just for the MOT session.
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Its fine just turn the map off run in stock mode but make sure the cat is nice and warm for emissions test
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MOT testing stations do not need to have noise meters. This has been going on in the motorcycle world for ages. ( I have had to change the race pipes on my Ducati 748 SPS several times before)
Just an extract from the VOSA, I know it is applicable to M/c's, however I remember reading somewhere that this had also become applicable to cars, I hope my memory is wrong, but it is time to get friendly with your local station.
The instructions will include an instruction to assess the exhaust noise with the engine
being revved, as currently it is assessed at idle, also to include a reference to a
standard silencer in the Reason for Rejection, as in the Motorcycle Manual. As
stated in the Method of Inspection wording, the test is subjective, and therefore relies
on the tester s judgement. MOT testing stations are not required (or permitted) to
use noise meters assess the levels of exhaust noise. However, as you intimate in
your e-mail, an MOT is issued to a vehicle and only confirms that it met the minimum
standard required at the time of test
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I have a mate who haz an r32 with a non res back box and decats who was pulled by the police and made to follow them to a vosa testing station where they then got him for noise pollution, a case of being to loud for a public highway
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I have a mate who haz an r32 with a non res back box and decats who was pulled by the police and made to follow them to a vosa testing station where they then got him for noise pollution, a case of being to loud for a public highway
....Your use of the term "non res" suggests a Milltek. However, the non-res component is the centre section before it runs into the back box. All Milltek exhausts leaving their factory are legal.
De-catting a car in the UK registered after 1993 is illegal as it will fail an emissions check. So I think your mate didn't really have a leg to stand on.
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having a catalytic converter on the downpipe would make it legal with respect to emissions, but if they deem the non resonated catback is too loud then its too loud, irrelevant of what miltek say tbh.
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Have Milltek do your MOT's.
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i was failed on a magic tree hanging from the center mirror last year, :stupid:
....Yes but the reasoning behind that is that it partially obscures your view while driving. Easy to remove just for the MOT session.
which i did after it failed :signLOL:
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It's down to testers opinion. As a tester myself iv being told that anything louder than stock is a fail but it's pretty obvious that a boy racer with a cannon sticking out the rear is not standard noise but unless it's stupid loud then it shouldn't fail.
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i had a 70mm full system on my type r and it was well over the decibel limit on full song :laugh:
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I must admit the res Milltek on my R32 could be loud so I dread to think what a non-res on there would be like. :scared:
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I must admit the res Milltek on my R32 could be loud so I dread to think what a non-res on there would be like. :scared:
non res with de-cat :innocent: :evilgrin:
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There have been de cat 2.0TFSIs passing the MOT emissions test ok.
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There have been de cat 2.0TFSIs passing the MOT emissions test ok.
Not what we are contesting. Noisy exhausts is the subject.
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There have been de cat 2.0TFSIs passing the MOT emissions test ok.
Not what we are contesting. Noisy exhausts is the subject.
So apart from Blueflame , Milltek, Apr, are you saying that these aftermarket systems may in future fail an MOT dave?.
Those 3 systems are the most common on here, and thus being the only ones that may effect us in this forum.
Out of those 3, id be happier with the milly, as its the quitest of those .
Still cant see it personally,nothing to be overly concerned about. There are louder Motorcycles and Scooters on the road, then our modified Golfs.
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Steve, not debating which, why, who or what.
My original post gives a link in which a car owner with an after-market exhaust, is questioning an MOT failure.
I know it is very prominent within the 2 wheeled world, however it seems it is applicable in the 4 wheeled world, it is entirely subjective, one MOT tester may fail a car that another passes.
Taken from the Direct Gov website.
Exhaust system - complete, secure, without serious leaks and silences effectively
Taken from the MOT testers handbook (note the formatting is up the spout, but you get the idea)
1. Examine the condition of the whole exhaust system, including the silencers and mountings, for security, deterioration and completeness
Note: The overall security of the exhaust system should be assessed; one or more exhaust mountings missing may not be a Reason for Rejection.
2. With the engine running
a. check the exhaust system for leaks
b. assess subjectively the effectiveness of the silencer in reducing exhaust noise to a level considered to be average for the vehicle.
Note: The level of exhaust noise should be assesed at all engine speeds required for the exhaust emissions check.
1.
a. A part of the system missing or excessively deteriorated By QD- Non Res?
b. an exhaust system not adequately supported.
2.
a. A major leak of exhaust gases from any part of the system
Note: A minor exhaust leak from, for example, a connection joint or a pin hole, is not a Reason for Rejection
b. a silencer in such condition, or of such a type, that the noise emitted from the vehicle is clearly unreasonably above the level expected from a similar vehicle with a silencer in average condition.
If it fails, take it to another test station. Pays your money and take s your choice, I personally think along with other aspects is a sign of things to come.
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I'm not saying or claiming that the other aftermarket exhaust companies don't make an effort to comply but I know for a fact that Milltek are very keen to comply with regulations whether they agree with them or not. Consequently I'm very confident in my Non-Res Milltek (actually it's a custom built design) continuing to pass MOT.
Btw, I assume the MOT tester makes his/her noise assessments from outside the car. A lot will also depend on the acoustics of the individual shed or workshop where the MOT is being conducted. You can argue or appeal over a MOT fail or advisory - I've done so and won. No prizes for guessing what it was about!
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Robin, as my reply stated. I posted the thread because it was interesting. I am notbothered about the pro's and con's of your milltek exhaust. It is like a bust record, We all know you are a milltek fan boy.
This is about AFTER MARKET exhausts failing MOT tests. Not aboutmilltek being the best because they try hard to make exhausts legal. Do you thinkthe MOT tester is bothered by that? If HE thinks it is too noisy it won't matter what badge it has on it's tailpipe.
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If your worried about failing an MOT due to aftermarket
exhaust being considered too loud, then just use your
stock exhaust for the MOT :happy2:
Same as if you decat it, just place the cat back on for
MOT :happy2:
Simples :smiley:
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Robin, as my reply stated. I posted the thread because it was interesting. I am notbothered about the pro's and con's of your milltek exhaust. It is like a bust record, We all know you are a milltek fan boy.
This is about AFTER MARKET exhausts failing MOT tests. Not aboutmilltek being the best because they try hard to make exhausts legal. Do you thinkthe MOT tester is bothered by that? If HE thinks it is too noisy it won't matter what badge it has on it's tailpipe.
....Sorry mate but I was responding to an earlier post (Reply #19) by Saint Steve which mentioned aftermarket exhausts and Milltek and pointing out an advantage of a Milly when it came to MOT tests. "We" as you put it, are only the old hands who have been on this forum for a long while - There are plenty of newcomers who haven't heard my fine record :grin:
Yes, your thread is of great interest :smiley: even if it has raised alarm bells in some quarters. :happy2:
Methinks you're a little too fast to jump on me whenever I mention the "Milltek" word sometimes - I don't see you jumping on Mat when he mentions Blueflame, but no matter :P :happy2:
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If your worried about failing an MOT due to aftermarket
exhaust being considered too loud, then just use your
stock exhaust for the MOT :happy2:
Same as if you decat it, just place the cat back on for
MOT :happy2:
Simples :smiley:
....But nothing like as easy as removing a dangly air freshener etc from your rear view mirror for MOT. It's ok if you've got either a ramp or a pit and all the right tools to temporarily replace an exhaust but costs money to ask a professional to do it (circa £60). Exhaust pipes, because they expand and contract due to heat a lot, have a tendency to become very tight and awkward to change.
I suppose that if you have an exhaust system such a Non-Resonated Milltek (dare I mention the word!) you could just swop the centre section. But then, a Milltek (Oooops!) isn't likely to need being made quiet enough anyway.
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i'll be rolling into my MOT with a non res catback, i'll let you know how i get on :wink: