Re: [St] Noise profile for 2006 Sprint ST 1050 c/w sport cans

[brettwilson21@xxxxxxx]

Am I reading this correctly?



There are noise restrictions at a race track???



What happens when theres a bona fide race meeting and all and sundry are running open race cans?



Brett.


-----Original Message-----
From: Barry Evans <barryevans@xxxxxxxxxxx>
To: st@xxxxxxxxxxxxxxxxxxxx
Sent: Wed, 27 Aug 2008 9:05 pm
Subject: Re: [St] Noise profile for 2006 Sprint ST 1050 c/w sport cans




Dan,

I don't think they are that technical in France! And perhaps, hopefully,
they don't care that much. A mate who has been before tells me that they
didn't even bother testing his 2007 Gixer because it had a standard exhaust
on. So perhaps they may look at mine and think its standard?

Thanks for offer of doing profile, but would the differences in engine and
exhaust be too great to be useful?

Barry

 
> Message: 6
> Date: Tue, 26 Aug 2008 07:52:40 -0500
> From: Dan Wetherington <dnlwthrn@xxxxxxxxx>
> Subject: Re: [St] Noise profile for 2006 Sprint ST 1050 c/w sport cans
> To: ST@xxxxxxxxxxxxxx
> Message-ID: <48B3FC98.5050000@xxxxxxxxx>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
> 
> Barry,
> Do you have more info on the requirements?  You can't just 
> impose a dB 
> limit, there has to be some specification on how the number is 
> acquired.  Here in the US, they say something like this:  
> (for Illinois 
> - Maximum allowable A-weighted sound levels based on 
> measurements taken 
> at a distance of 50 feet (Sec. 902.122): 80-82dBA at less than 35mph; 
> 86dBA at more than 35mph.)  Once you know the distance that they test 
> at, you would actually be able to check your bike.  I'm spoiled as I 
> have a SPL meter at work.  However, I have a 2003 Sprint with 
> the stock 
> can, so I can't help with the profile...
> 
> Dan
> 
> Barry Evans wrote:
> > I have a 2006 Sprint ST 1050 (purchased and serviced in 
> Geneva, Switzerland)
> > fitted (and tuned) with the OEM Triumph sports can. Runs 
> like a dream :)
> > I've done a couple of track days (and love them), but more 
> and more tracks
> > are imposing noise limits. My understanding is that my can 
> puts out about
> > 101 dB? A track I'd like to ride in Sept 
> (http://www.circuitdebresse.fr/) ,
> > has a max of  95 dB at 60% revs. Anyone have a noise 
> profile (db vs. rpm)
> > for this can? 
> > I know in my helmet it sounds 'fruitiest' about 60% (c. 
> 5-6k rpm), but not
> > sure if that is when it runs at max dB?
> >  
> > How big
 a job is it to swap cans? The original is sitting 
> in a box in my
> > garage, but I have never touched it. Annoying kids on 
> 2-strokes make more
> > noise every bloody hour outside my street, so its hardly a 
> problem running a
> > sports can at street speeds here and elsewhere in Europe. 
> And if I did swap
> > it temporary for the track, would the bike run OK with the 
> sports tune?
> >  
> > If its all too much bother, I'll just go for (another) ride 
> on the superb
> > mountain roads around here which are now starting to be 
> clear of tourists
> > and still clear of snow :)
> >  
> > Thanks
> >  
> > Barry


_______________________________________________
Triumph Sprint ST/RS mailing list
Send list posts to ST@xxxxxxxxxxxxxx
Change your list options at www.Triumphnet.com

_______________________________________________
Triumph Sprint ST/RS mailing list
Send list posts to ST@xxxxxxxxxxxxxx
Change your list options at www.Triumphnet.com