Maybe im over thinking this but when i had just got my 2010 snopro500 the race replica sled my uncle got me a sno stuff can and dnr got on me for it being way to loud and gave me a public disturbance ticket. Well it was mildly upgraded then. This summer i sent the motor off to have it gone through and built up alot more. They told me stock exhaust was to restricting. So i bought a can that is supposed to be much better and not so loud. To me its louder than before but my worry is i dont want dnr on my butt again should i see if its under the sound limit or rock it for the season???? To me its the loudest sled ive ever had. Maybe because im to worried
think im safe or no?????
- Thread starter Modman440
- Start date
Loud sleds only cause all of us problems. They cause the town residents to want the trails through town closed, the land owners who have to listen to them through the back of their property tell the Clubs NO for next year.
If you have a smartphone, there are free decibel meter apps out there that are pretty accurate (have one on an iPhone that we use at our events in the summer, which we regularly check against our regulation equipment). That will give you a more honest "how loud is it" reading.
Sorry I don't have a good suggestion on which pipe/can to use to solve the issue.
If you have a smartphone, there are free decibel meter apps out there that are pretty accurate (have one on an iPhone that we use at our events in the summer, which we regularly check against our regulation equipment). That will give you a more honest "how loud is it" reading.
Sorry I don't have a good suggestion on which pipe/can to use to solve the issue.
sledboy482
Member
I'm with 2TrakR on this one. I don't recall the statistics completely, but if you go from 88 decibels to 90 or 92 decibels, you actually have doubled the amount of sound that comes out. In Wisconsin the law is 88 decibels for anything manufactured after 1972 if memory serves me. It's been 5 years since I dealt with that stuff. I was amazed at how just going up a couple decibels you double the sound. Yes, quiet is best.
i live right off of a ditch that the trails runs on and the loud cans drive me nuts, i know this subject has been beatin to death throughout every snomobile forum in the world, but there is no can available that gives you more H.P. its all in your head from the sound it makes, and it just pisses people off that live by trails, i love being on a quiet sled.
Hearing damage can happen to prolong noise exposure at greater than 80DB without ear protection. If you must use a loud can use ear protection to save your hearing. I dislike loud cans at gas stations or out on the trails but to each his own. WI DNR & LEO will bust you I have seen it happen not so much in UPMI at least I have not seen it happen up there & some loud stuff on trails.
garyl62
Active member
I down loaded an app for my phone today and promptly went and fired up the sled. I'm reading 84db's when it is idling. Couldn't raise the track, hit the throttle and hold the phone all at the same time, so I just bumped it a little and saw no change on the reading. Seems like a great app and I'm sure I use it for other things along the way.
Is the Wisconsin law based on idle level? I figure it must be as I can't think of how they would measure it at any other time.
I don't have the details of the official testing procedure off hand, seems like it was a test from 15 feet while the machine passes you at 15MPH or something to that effect. The test was above idle and under power.
From the WI DNR Snowmobile Rules (http://dnr.wi.gov/files/pdf/pubs/le/le0201.pdf):
Your snowmobile must have a muffler in good working order, which blends the exhaust noise into the overall engine noise. The only exception to the sound laws are when you operate your snowmobile during a Sanctioned Race or you are a dealer/manufacturer testing the snowmobile on your own land.
◆ Noise limit—for every snowmobile manufactured on or after July 2, 1975, the noice level standard for exhaust and engine noise shall be 88 decibels as measured in accordance with the procedures established for the measurement of exhaust sound levels of stationary snowmobiles in the January 2004 Society of Automotive Engineers Standards J2567.
�� To help stay compliant, do not alter your exhaust to be louder than the original exhaust system. If your snowmobile sounds louder than normal, you may be in violation. Maintain your snowmobile and seek the advice of a service technician if you are in doubt.
You cannot modify your snowmobile’s exhaust in any manner that will amplify or increase the total noise emission above that emitted by the snowmobile as originally manufactured, regardless of date of manufacture.
�� Excessive or unusually loud snowmobiles are illegal and hurt Wisconsin’s trail system. Do not increase your exhaust noise or operate with your exhaust system in excess of the sound limits. Wisconsin vigorously enforces the sound limits and penalties can be severe, however the worst thing about a loud snowmobile is that it causes properties to be permanently closed to snowmobile riding.
From the WI DNR Snowmobile Rules (http://dnr.wi.gov/files/pdf/pubs/le/le0201.pdf):
Your snowmobile must have a muffler in good working order, which blends the exhaust noise into the overall engine noise. The only exception to the sound laws are when you operate your snowmobile during a Sanctioned Race or you are a dealer/manufacturer testing the snowmobile on your own land.
◆ Noise limit—for every snowmobile manufactured on or after July 2, 1975, the noice level standard for exhaust and engine noise shall be 88 decibels as measured in accordance with the procedures established for the measurement of exhaust sound levels of stationary snowmobiles in the January 2004 Society of Automotive Engineers Standards J2567.
�� To help stay compliant, do not alter your exhaust to be louder than the original exhaust system. If your snowmobile sounds louder than normal, you may be in violation. Maintain your snowmobile and seek the advice of a service technician if you are in doubt.
You cannot modify your snowmobile’s exhaust in any manner that will amplify or increase the total noise emission above that emitted by the snowmobile as originally manufactured, regardless of date of manufacture.
�� Excessive or unusually loud snowmobiles are illegal and hurt Wisconsin’s trail system. Do not increase your exhaust noise or operate with your exhaust system in excess of the sound limits. Wisconsin vigorously enforces the sound limits and penalties can be severe, however the worst thing about a loud snowmobile is that it causes properties to be permanently closed to snowmobile riding.
garyl62
Active member
Now I'm hooked into this for no reason other than to have more useless knowledge that I can try to impress some guys with on the trail sometime. I searched for the January 2004 Society of Automotive Engineers Standards J2567 and got to their website, found the standard but it did not describe the test proceedure. I could have purchased the rule/standard where it descibes the test itself, but that was $65 and useless knowledge does have it's limits.... so, anyone know how they conduct the test?
I know I'm safe as I've not done any work to the exhust, but now I'm just to curious to leave it alone.
I know I'm safe as I've not done any work to the exhust, but now I'm just to curious to leave it alone.
srt20
Active member
Idk the procedure for testing sleds, but I did come across a DNR checkpoint on atvs a couple years ago. They were checking registration among other things. They were checking a sport atv with a exhaust that was not even close. They revved it up to prolly 5,000 rpms. We made a point of loudly showing our displeasure of that noise. The owner gave us a dirty look, but hey, it's not my fault he was an idiot. Yeah he got a ticket.
upbarleyboy
New member
Stock is safe-if you want to make noise legally, get into racing.
motor_slut
New member
Sno Stuff= garbage.
If your engine builder told you to get a better exhaust he didn't mean to get a silencer. He wanted you to get a full pipe. Go to Speedwerx and get their pipe and silencer.
If your engine builder told you to get a better exhaust he didn't mean to get a silencer. He wanted you to get a full pipe. Go to Speedwerx and get their pipe and silencer.
apparently you dont own a four stroke.