Perhaps some of the tech genius in here can help me in my quandry [bow_down]
I am scheduled for 2 days in November at Laguna Seca. As most people know they have strict sound restrictions. Trouble is (as you might have guessed by the subject line) I anticipate my bike being too loud.
From what I understand they will kick your ass off if you break the 92DB requirement.
I have an 06 GSXR1000 with a full M4 system. I do not have the stock setup anymore. Is there any way I can retrofit the M4 system with a baffle (or something) to get the noise down? Do they even make those? Am I better off trying to commandeer an OEM setup (and will that mess up my PC/Ignition/QS)?
Any thoughts, advice or remedies are appreciated.
Thx
i have no idea how to help you, other than to suggest Barber Motorsports park :P
Quote from: madmatt on September 18, 2009, 02:06:14 PM
Perhaps some of the tech genius in here can help me in my quandry [bow_down]
I am scheduled for 2 days in November at Laguna Seca. As most people know they have strict sound restrictions. Trouble is (as you might have guessed by the subject line) I anticipate my bike being too loud.
From what I understand they will kick your ass off if you break the 92DB requirement.
I have an 06 GSXR1000 with a full M4 system. I do not have the stock setup anymore. Is there any way I can retrofit the M4 system with a baffle (or something) to get the noise down? Do they even make those? Am I better off trying to commandeer an OEM setup (and will that mess up my PC/Ignition/QS)?
Any thoughts, advice or remedies are appreciated.
Thx
A stock system will mess with the fueling and will more than likely make the thing less than fun to ride.
A db killer will reduce sound levels and leave the bike rideable, but with somewhat less power.
You may have to fab something up. I can post a pic of a 'typical' db killer from a Duc if it helps.
Quote from: ducpainter on September 18, 2009, 03:11:04 PM
A stock system will mess with the fueling and will more than likely make the thing less than fun to ride.
A db killer will reduce sound levels and leave the bike rideable, but with somewhat less power.
You may have to fab something up. I can post a pic of a 'typical' db killer from a Duc if it helps.
I am investigating a MIVV DB killer...should be in the range of $25...hopefully I can find one to fit.
If not, I'll take you up on the offer to see one...
thanks!
Just figure out where the sound trap is & pull the clutch each lap as you pass it & idle thru [cheeky]
I believe its on the straight away lol. Also I thought they make sure you have a stock system on.
Someone please correct me if I am wrong.
can't offer specific advice, but be aware if you have modified the intake/airbox that can make the bike MUCH louder too so muffing the exhaust might not be enough to pass the db test...this is a common problem for cars on track days, intake AND exhaust need work to meet the track noise spec
Quote from: madmatt on September 18, 2009, 02:06:14 PM
From what I understand they will kick your ass off if you break the 92DB requirement.
Really? How is it measured? Hopefully, riding past at some point on the track. FWIW, the DOT requirement for noise level is 98db @ 1 meter. 98db being 6 db louder than 92db means it's twice as loud. I can probably fart louder than 92 db @ 1 meter. [thumbsup]
Quote from: dlearl476 on September 19, 2009, 10:36:52 AM
Really? How is it measured? Hopefully, riding past at some point on the track.
http://joeracer.blogspot.com/2008/02/laguna-seca-sound-restrictions.html (http://joeracer.blogspot.com/2008/02/laguna-seca-sound-restrictions.html)
Lol.
haha, that is awesome.
When I was last investigating a track day there, I found out that they had changed the rules to only allow stock exhausts!! You had better call them and be sure of what the current rules are....
Quote from: hypurone on September 23, 2009, 05:52:08 AM
When I was last investigating a track day there, I found out that they had changed the rules to only allow stock exhausts!! You had better call them and be sure of what the current rules are....
yikes...I got the db killer and it fit like a glove. Good tip...I'll do some investigation.
Quote from: dlearl476 on September 19, 2009, 10:36:52 AM
Really? How is it measured? Hopefully, riding past at some point on the track. FWIW, the DOT requirement for noise level is 98db @ 1 meter. 98db being 6 db louder than 92db means it's twice as loud. I can probably fart louder than 92 db @ 1 meter. [thumbsup]
Pressure level doubles every 3 db. 6 db difference means its 4 times as loud. Stupid logarithmic scale. >:(
Quote from: hypurone on September 23, 2009, 05:52:08 AM
When I was last investigating a track day there, I found out that they had changed the rules to only allow stock exhausts!! You had better call them and be sure of what the current rules are....
From the horses mouth: the stock pipe 'rule' is set (and enforced) only by the group who is renting the track. To their knowledge, Keigewin's is the only organization that publishes this 'rule.' Otherwise, the staff @ Mazda Raceway only enforce the 92db restriction.
Blam. I'm good to go.
BTW - that db killer really shut my bike up. Amazing.
What's the point of the noise restriction?
they obviously don't make the GP bikes adhere to this policy.
Quote from: madmatt on September 25, 2009, 08:16:15 AM
From the horses mouth: the stock pipe 'rule' is set (and enforced) only by the group who is renting the track. To their knowledge, Keigewin's is the only organization that publishes this 'rule.' Otherwise, the staff @ Mazda Raceway only enforce the 92db restriction.
Blam. I'm good to go.
BTW - that db killer really shut my bike up. Amazing.
Man that is weird shit. I would hate to truck my ass all the way down there and have it go the other way....Let us know if it goes ok. Or not.
Quote from: cyrus buelton on September 25, 2009, 09:56:43 AM
What's the point of the noise restriction?
they obviously don't make the GP bikes adhere to this policy.
My understanding is they only have so many days per year when they can be as loud as the GP and AMA bikes are, so the track day people get stifled.
Quote from: madmatt on September 25, 2009, 08:16:15 AM
From the horses mouth: the stock pipe 'rule' is set (and enforced) only by the group who is renting the track. To their knowledge, Keigewin's is the only organization that publishes this 'rule.' Otherwise, the staff @ Mazda Raceway only enforce the 92db restriction.
Blam. I'm good to go.
BTW - that db killer really shut my bike up. Amazing.
Did it run OK?
Quote from: ducpainter on September 25, 2009, 12:26:43 PM
My understanding is they only have so many days per year when they can be as loud as the GP and AMA bikes are, so the track day people get stifled.
that is my understanding too.
Quote from: ducpainter on September 25, 2009, 12:26:43 PM
Did it run OK?
only started it and gave it a few revvs after inserting it. seemed ok. I guess only use will tell.
Quote from: cyrus buelton on September 25, 2009, 09:56:43 AM
What's the point of the noise restriction?
they obviously don't make the GP bikes adhere to this policy.
cuz there's a golf course next door [laugh]
Quick update. Trip to Laguna ended up getting cancelled, although I had already installed the DB killer. I brought the bike up to SOW for a weekend and realized that the DB killer was also killing my HPs. My normally unwieldy 1K was rather tame, so I knew something was up.
I was cornerworking for CSS, and during my session I went to pull the DB killer out, but it was a stuck and my session was over so I returned to my corner, problem was that I had removed my pipe and didn't have time to reinstall. I rode back to the corner with a straight pipe (sounded like a GP bike, Laguna would NOT have approved) and waited for my next session. I rode back down to the pits (still without a pipe) only to realize that my bike was sputtering and bucking like a bronco...power on, power off, power on, power off.
After some trouble shooting, I suspected that riding without the pipe caused my spark plugs to fail (could also explain the lack of power earlier in the day, plugs were probably on their last legs).
I popped out the DB killer, popped on the pipe, popped in new plugs (all in about 30 minutes) and headed back out for another session.
The bike was back to its scary self. Clicked off some of the best laps of my life.