Exaust cut out valves... UK Legal?
- Thread starter JUKE179r
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Henry_b
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So they do use db meters thenI can just imagine what the boss would say if the all garage work stopped so the MOT tester could get an accurate meter reading.
If he found my vehicles to loud, the first thing I would say is your meter calibrated like mine. I had to buy six but we only had 5 engineers at the time, so I kept one, and used when I stepped in with commissioning of a fire alarm system... no engineers spare to do the job.
Out of interest I’ll be checking the exhaust dB on my cars next weekend. Sound system in the disco peaks at 91db without distortion.
Aye he uses a DB meter when possible..
There is a large compound outside that he usually moves the car out to!
Nice and quiet
JUKE179r
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There is some good info on here.
I asked the question only because I've cut and installed these valves on friend's '07 Mustang GT in Germany and '63 Chevy Impala in Arizona with no problems from the German TUV inspection, smog inspection or from the police.
I asked the question only because I've cut and installed these valves on friend's '07 Mustang GT in Germany and '63 Chevy Impala in Arizona with no problems from the German TUV inspection, smog inspection or from the police.
Henry_b
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I myself like a good V8 rumble, however there is a limit.
Unreasonably loud pipes just sound dickish to me, especially those on crummy little hatchbacks.
Although I don't discriminate any car with an overly loud exhaust should be failed imo.
Unreasonably loud pipes just sound dickish to me, especially those on crummy little hatchbacks.
Although I don't discriminate any car with an overly loud exhaust should be failed imo.
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How many v8 hatchbacks are there?
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But it's road legal,unnecessary and typical boy racer
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and? still dont make him anything other than a pratt
Thats straight from the factory, no after market add on.and? still dont make him anything other than a pratt
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So?
discool
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I know or three as a starter, and they are all Jaguar’s and fitted with a V8 from the factory XK8 XKR and the F Type.
Then there’s the hatchbacks from years ago, that had a V8 transplant.
discool
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There’s no dB meters approved for testing life-safety systems either, but there’s a legal requirement that the meters are used and the results meet the requirements and are logged.
Dartmoor Navigator
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It appears the standard is entirely subjective and up to the judgement of the tester.
8.1 Noise
8.1.1 Noise suppression system
You must inspect:
- exhaust silencers
- under-bonnet noise deadening material fitted as original equipment – you don't need to inspect this for Class 3 vehicles
- during the emissions test for the vehicle
- rev the engine to around 2,500rpm or half the maximum engine speed if this is lower on vehicles not subject to an emissions test
discool
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Simples, if it was a requirement... just state it meets the also requirements for use in checking exhaust sound levels in the meter’s specification, but then sound is sound wherever and professional meters are already certified and calibrated.
So what do u think would change with a dB meter? if there was a change to the MOT and exhaust sound levels were in included.
Perhaps to save holding it, it wouldn’t be a hand held meter, it would have a stand similar to a head lamp beam unit with a tape measure attached of course, to help the poor tester, as they will have a bit more to do, and so ensure that they have the correct distance from the exhaust pipe exit before carrying out the test.
We will see maybe or maybe not.
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Colthebrummie
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Acoustics is a complicated science. You could have the best sound level meter in the world but it would give different results in different garages for the same car because the garage itself may be amplifying the sound level, not to mention all of the background noise the meter will pick up. I have several meters, the most expensive cost £1500, even when calibrated they don't always give the same result.
Col
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