scoop
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| posted on 16/5/09 at 02:20 PM |
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Potential bad news on the noise front...
I was speaking to a Traffic guy at work yesterday and the rule about legal exhaust noise levels is likely to come into greater force soon. That limit
is 74db's
There is a little more to it than just taking a roadside reading but that is the rule for passenger vehicles.
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clairetoo
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| posted on 16/5/09 at 02:22 PM |
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But if you can pass the SVA at 101db's.......?
Its cuz I is blond , innit
Claire xx
Will weld for food......
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mr henderson
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| posted on 16/5/09 at 02:28 PM |
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I thnk I can see both sides of this argument.
On the one hand, I work full time on cars that would have difficulty in meeting such a low limit, and on the other hand I live in a country area where
noisy cars, and to a much greater extent, noisy motorbikes, can be heard for the best part of two miles.
I suppose the right thing to do know is for us all to start thinking abut how our cars could be made a good deal quieter in case this rule does come
in and, more tothe point, get enforced.
There isn't really room for an expansion box on a se7en, and the complex pipework that modern cars have to keep the induction quiet would also
be a big problem.
This is going to be tricky.
Anybody who feels really strongly about this might loke to start a petition, personally I don't think it's worth the bother
John
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Jasper
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| posted on 16/5/09 at 02:40 PM |
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My shop is right on a main road through the town and we get loads of bloody born again bikers on Harleys, those things make a HUGE amount of noise
.... how come they're legal?
Awful things should be banned .... rant over 
If you're not living life on the edge you're taking up too much room.
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iank
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| posted on 16/5/09 at 03:18 PM |
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The figure is meaningless without a distance, I suspect what is happening is the roadside test is being brought into line with IVA which is lower
than SVA.
I'd not get worried yet see the following for a sense of what 74dB means.
http://www.chem.purdue.edu/chemsafety/Training/PPETrain/dblevels.htm
(minor point, but IVA/SVA measure dBA which is slightly different)
--
Never argue with an idiot. They drag you down to their level, then beat you with experience.
Anonymous
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speedyxjs
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| posted on 16/5/09 at 04:35 PM |
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But what revs is that at? If it is at idle, it'll be no probs
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spaximus
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| posted on 16/5/09 at 04:52 PM |
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I think this will be come a legal minefield in the future.
I was at the department of transport for a meeting on Monday with a man who has a title of head of Emissions and noise reductions. This is being
driven by the EU where they are pushing for less road nosie from tyres and from exhausts. So it is an issue that is getting attention. The legal
problem is it is very difficult to operate a retrespective law. A car leaglly produced and registered at 100DB should not be subjected to a design led
law where it cannot possibly pass.
Motorbikes have to have any replacement exhaust made to the BS standard which means they cannot be any louder, we all know they are but that is the
law.
I feel that so long as your road exhaust passes the soud level it was designed for then you will be okay, the caveat is that the person doing the test
will not necessarily be aware of the design/law it came under. Perhaps we all need to carry a copy of the relevan SVA/IVA page to ensure we have an
answer.
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jonesier1
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| posted on 16/5/09 at 05:17 PM |
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there is a diffrence between an exhaust note that is loud and sound nice and something like a harley that sounds crap and is way too loud..
[Edited on 16/5/09 by jonesier1]
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mr henderson
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| posted on 16/5/09 at 05:36 PM |
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I think the problem with Harleys is that it is all about posing and bonding with other (HOG riders, isn't that what they call themselves?), and
part of the pose is to have what are, in effect, open pipes. Presumably they put the proper ones back on for MOTs
John
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rusty nuts
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| posted on 16/5/09 at 06:02 PM |
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Don't suppose it will stop the boy racers on their mopeds taking the baffles out of the exhaust round my way. I can hear them coming a good 5
minutes before they arrive late at night. Most of the proper "bikers" don't seem to be as noisy
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Simon
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| posted on 16/5/09 at 06:49 PM |
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Won't be retrospective, so I'll be sticking to about 104db at the mo
On the subject of Harleys, why do their owners try thrashing their bikes? Is it cos they're closet Jap sport bike riders who'll have the
proverbial taken by their peers
ATB
Simon
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Ninehigh
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| posted on 16/5/09 at 08:07 PM |
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By the look of it 74db is pretty quiet for anything other than a luxury saloon, especially at speed
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flak monkey
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| posted on 16/5/09 at 08:47 PM |
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quote:
Originally posted by jonesier1
there is a diffrence between an exhaust note that is loud and sound nice and something like a harley that sounds crap and is way too loud..
[Edited on 16/5/09 by jonesier1]
You've got to b kidding?!
The sound of a big twin is just simply awsome...its one of those iconic engine notes, up there with the big block V8 on race pipes
David
Sera
http://www.motosera.com
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MikeRJ
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| posted on 16/5/09 at 11:21 PM |
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quote:
Originally posted by flak monkey
You've got to b kidding?!
The sound of a big twin is just simply awsome...its one of those iconic engine notes, up there with the big block V8 on race pipes
David
Have to agree with him, whilst V twins can sound great, Harleys on open pipes just make a repulsive "blattering" noise. Strangely all the
Ducatis I've heard on race can sound awesome though, maybe just down the to primitive engines in Harleys?
[Edited on 16/5/09 by MikeRJ]
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wilkingj
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| posted on 17/5/09 at 09:52 AM |
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It fully expect it wont be retrospective. Laws in the UK rarely are.
It will affect newly built cars.
As a last resort, Fit a TURBO, they gobble up noise, and make you go faster.
I ran my Land Rover with just the turbo and straight pipe for a month before I realised the back box had dropped off.
There was very little increase in noise, and that was just with a straight pipe from the turbo. I had ditched the £70 centre box years ago as it rots
quickly and wasnt really necessary.
I would wait until this become actual law with real details of what the requirement is rather than speculation on what might happen before doing any
worrying about it.
1. The point of a journey is not to arrive.
2. Never take life seriously. Nobody gets out alive anyway.
Best Regards
Geoff
http://www.v8viento.co.uk
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iank
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| posted on 18/5/09 at 07:58 AM |
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quote:
Originally posted by wilkingj
It fully expect it wont be retrospective. Laws in the UK rarely are.
It will affect newly built cars.
Thus my suspicion that IVA has already been brought into line with the new rules, which explains why the dropped the levels from SVA.
quote:
As a last resort, Fit a TURBO, they gobble up noise, and make you go faster.
I once saw them called 'rotating silencers', think it was by the guy who invented the beach buggy (Meyers)
quote:
I would wait until this become actual law with real details of what the requirement is rather than speculation on what might happen before
doing any worrying about it.
Absolutely!
--
Never argue with an idiot. They drag you down to their level, then beat you with experience.
Anonymous
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