Does anyone know the decibels for a micron serpent?
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| Track Day noise https://ukbeg.com/forum/viewtopic.php?f=7&t=11904 |
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| Author: | SimonD [ 07 Aug 2011 09:49 ] |
| Post subject: | Track Day noise |
Has anyone attempted to get an XB fitted with a pre '08 Remus (with road legal baffles) through a 105db track day noise test? I haven't done one for a few years and it seems that they've really tightened up on noise. It will be at Brands (Indy) or Snett but I'm only really going to accompany a friend on his first track day. |
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| Author: | ovi [ 07 Aug 2011 10:24 ] |
| Post subject: | Re: Tack Day noise |
my o4 xb12 with a remus was 106db with the quietest baffles in. the limit was 100db but they let me on track because "it's one of those american things". They also wanted me to hold the revs at 6000rpm for them to check . This was at croft . |
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| Author: | chispitas [ 07 Aug 2011 12:18 ] |
| Post subject: | Re: Track Day noise |
Does anyone know the decibels for a micron serpent?
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| Author: | Beef [ 07 Aug 2011 16:59 ] |
| Post subject: | Re: Track Day noise |
Not an exact figure.........but bloody loud if it's any help  
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| Author: | bikerdude666 [ 07 Aug 2011 19:22 ] |
| Post subject: | Re: Track Day noise |
chispitas wrote: Does anyone know the decibels for a micron serpent? According to the paperwork mine came with the micron is 115 decibels. |
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| Author: | Jimbo261 [ 07 Aug 2011 19:56 ] |
| Post subject: | Re: Track Day noise |
Have been thinking about a trackday for a while but don't know wether my very loud Uly would be allowed on track. How far from the bike do they hold the meter and would they really measure it at 6000, that's pretty much the red line? Also does anyone know if there's a reliable iPhone decebel meter? Thanks. Jimbo |
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| Author: | Bonzo [ 07 Aug 2011 19:59 ] |
| Post subject: | Re: Track Day noise |
Come over here. no noise limits 
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| Author: | Adam [ 07 Aug 2011 22:14 ] |
| Post subject: | Re: Track Day noise |
Jimbo261 wrote: Have been thinking about a trackday for a while but don't know wether my very loud Uly would be allowed on track. How far from the bike do they hold the meter and would they really measure it at 6000, that's pretty much the red line? Also does anyone know if there's a reliable iPhone decebel meter? Thanks. Jimbo Probe should be held 1m away from outlet at 45deg. A large twin should be measured at 5000rpm. A lot of testers at the track don't do this. |
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| Author: | pash [ 07 Aug 2011 22:38 ] |
| Post subject: | Re: Track Day noise |
Is the test speed not based on a % of your redline? |
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| Author: | pash [ 07 Aug 2011 22:46 ] |
| Post subject: | Re: Track Day noise |
pash wrote: Is the test speed not based on a % of your redline? Wow, evidently not... http://www.cadwell.ruffle.me.uk/include/scrut.html Bit biased cos your Buell revs to 7000rpm, whereas an R1 will rev to nearly double that... |
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| Author: | chispitas [ 07 Aug 2011 23:34 ] |
| Post subject: | Re: Track Day noise |
bikerdude666 wrote: chispitas wrote: Does anyone know the decibels for a micron serpent? According to the paperwork mine came with the micron is 115 decibels. Thanks - don't suppose I will be able to do a trackday now in the UK as it seems all tracks have a noise limit........
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| Author: | SimonD [ 08 Aug 2011 07:28 ] |
| Post subject: | Re: Track Day noise |
There are so many variables that absolute numbers are pretty meaningless. I was just wondering if anyone had experience of the baffled Remus and/or the particular circuits. I'm guessing that Brands will be tight (though probably less so for the Indy circuit) but I've never been to Snetterton. I think Focused Events are at Brands next week so I might pop down and get them to test it. |
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| Author: | Gee Tee [ 08 Aug 2011 10:06 ] |
| Post subject: | Re: Track Day noise |
Adam wrote: Jimbo261 wrote: Have been thinking about a trackday for a while but don't know wether my very loud Uly would be allowed on track. How far from the bike do they hold the meter and would they really measure it at 6000, that's pretty much the red line? Also does anyone know if there's a reliable iPhone decebel meter? Thanks. Jimbo Probe should be held 1m away from outlet at 45deg. A large twin should be measured at 5000rpm. A lot of testers at the track don't do this. That's exactly how we were tested at Brands in July. My Ducati 900 trike was 98db with baffles in, but a few of my mates only just squeezed under 105db on open cans. They also had meters placed around the track but I don't know if that's standard practice. It was the Modified live event for bikes and cars, and we got two sessions on the indy circuit. http://www.modifiedlive.co.uk/page.php?a=3&s=157&p=157 
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| Author: | edd [ 08 Aug 2011 17:58 ] |
| Post subject: | Re: Track Day noise |
Jimbo261 wrote: Have been thinking about a trackday for a while but don't know wether my very loud Uly would be allowed on track. How far from the bike do they hold the meter and would they really measure it at 6000, that's pretty much the red line? Also does anyone know if there's a reliable iPhone decebel meter? Thanks. Jimbo My old works rubber cased 'nokia 5140i' model had a decibel meter (also camera, voice recorder, compass, stopwatch, etc, etc), but work retrieved them for cheaper model. 
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