failed noise test uk trackdays - MVAgusta.net
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post #1 of 14 (permalink) Old 05-15-2011, 07:55 AM Thread Starter
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failed noise test uk trackdays

I went to a cadwell park track day on wednesday and failed the noise test at 111db, luckily I had the standard cans with so I fitted them and passed 96db at idle and 100 at 5500rpm. I have gutted my standard cans and re baffled them ( not very well it seems).
Anyhow have any UK guys got straight through or race cans in the four pipe format that have been tested and passed.
I'm not keen on two pipes. But the bike was definately slower to rev with the restricted pipes on.
It was tested twice and the operator said it didnt sound that loud but failed it anyway!
Any help answers

Clive
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post #2 of 14 (permalink) Old 05-15-2011, 09:40 AM
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similar problem here:

i have the RG 3 and stainless steel headers (no cat) with
microtec ECU on my F4 1078 312 RR. measured 103 db
at 6000 rpm during the last noise test.

as many race tracks in germany have 100 db or even 98 db
limits (at 6000 rpm), are there some easy tricks i can do to
reduce the noise.

i will certainly take the stock cans with me next time,
but i am worried how the mapping on the ECU will
cope with that.

i dont think the F4 are very loud on the track; especially
compared to some twins. it is mainly the noise test, which
is hard to pass.
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post #3 of 14 (permalink) Old 05-15-2011, 10:57 AM Thread Starter
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Firedancer I have the Microtec,deat etc also and whilst the bike was still plenty fast enough to outdrag most bikes it felt slow to rev in the top three gears. The mapping low down was as good as usual and it still pulled strong from 2000 rpm. Perhaps I need to find some RG3's.

Frenaugo I wondered if they need to hold the noise meter at a different angle, but they also said in the paper work about drive by tests. But there were gixxer's there that sounded much louder, in hindsight I should have swapped them back for the last session.

The odd thing is I had my '98 R1 with me with straight through system with no exup and it was 97db at 5500rpm yet sat idling next to the MV I cant here the MV!
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post #4 of 14 (permalink) Old 05-15-2011, 12:09 PM
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I find it hard to believe that your bike was 111db as our 312's had full zard systems and passed at BSB time and again at 105db.

I'm sure there is a correction for engine size, humidity etc that needs to be taken into account.

My money is on the test having been done wrong.

could be wrong though
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post #5 of 14 (permalink) Old 05-15-2011, 01:10 PM Thread Starter
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Perhaps we need a noise test map?
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post #6 of 14 (permalink) Old 05-15-2011, 03:47 PM
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Mine failed oulton last August. 110db.

It took me an mate a couple of hours of bodging to get it down to 105db.

Ended up missing a mornings riding!


The testers now have more up to date equipment & were failing plenty of bikes with carbon cans as they tended to be the loudest.
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post #7 of 14 (permalink) Old 05-15-2011, 08:44 PM
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Fucking noise tests at racetracks. So sad. I'm glad none of the tracks around here do it... yet.
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post #8 of 14 (permalink) Old 05-15-2011, 09:59 PM
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They do it here up at Symonns Plains ..

They hold the measuring device exactly 1metre away from the outlet and at right angles to it!!

Symons Plains is miles away from any houses - just a highway passing by!

WTF! Sticking the sensor down the pipe - how stupid - it would be then affected by stainless, carbon or many other factors, materails used in the construction of the exhaust etc etc IMHO!!!!

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post #9 of 14 (permalink) Old 05-15-2011, 10:07 PM
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Thumbs down noise?

Quote:
Originally Posted by cleophus james View Post
Fucking noise tests at racetracks. So sad. I'm glad none of the tracks around here do it... yet.
the twat that runs Laguna Seca does for her yuppie neighbors

I wonder if they complain about the noise from the artillery ranges at Fort Ord......right next to the track..... a 155 mm Long Tom makes a tad more noise than any motor on the planet

http://www.google.com/imgres?imgurl=...ed=0CEMQ9QEwBQ

at 20-24 rounds a minute




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post #10 of 14 (permalink) Old 05-16-2011, 02:43 AM
Red face

It seems to be the way of things. The long circuit at Brands Hatch is rarely used these days because of the fear of upsetting the 'neighbours'.

Another slightly bizarre twist is that for 3 or 4 years now trains in the UK are not allowed to sound both notes on the warning horn.

Railway locos are renowned here for the dee dah warning horn noise. Most kids when asked what noise a diesel train makes will say dee dah, but now the driver is only allowed to sound one of the notes to appease the environmentalists. What a crock of crap!


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Keep one wheel down!

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If you can't fix it with a hammer you've got an electrical problem!


No MV's in the garage anymore
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but I pop in here from time to time
. Come to think of it I don't have a garage since the old one burnt down!
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But.....a new one is currently rising from the ashes......watch this space!
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