Exhaust Cans....

Yes that is the catch. Reality though is they are enforcing the stationary method. Still like you said they could throw that at ya. Issue with that part of law was sleds tested in field didnt pass even stock. "A" is one of those laws that are not enforced.
 
So 4 meters away.....

Going on the road tonight with MBRP....if it isn't raining.
 
NOS-PRO said:
So 4 meters away.....

Going on the road tonight with MBRP....if it isn't raining.
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My question is; How do you get the 4000rpm? Belt on, rear of sled elevated? Belt off? It seems that if the track is moving it generates plenty of noise on it's own. My impression of the Viper is that at that speed the track noise is greater than the exhaust. Getting a sled to stay at 4000 rpm with the belt off is not easy either, even harder with a 2 stroke. Actually I thought it was not recommended to run a sled with the belt off.
 
TD Max said:
Does your meter have selective weighting so that you can use "A"

http://en.wikipedia.org/wiki/A-weighting
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I just became Albert Einstein by reading and figuring all the mathematical problems there....LOL. :)

The sound meter I have here at work and the one I use are within spec of each other, the one at work is calibrated by NIST standards. It does have different weighting selections, but when I turn on A, the meter is way higher. I do not know if "A-weighting" would be adviseable, the way I understand it is it would be worse if A-weighting would come into play by what I see on our meter here at work. My meter doesn't have it.
 
sk-rx1 said:
My question is; How do you get the 4000rpm? Belt on, rear of sled elevated? Belt off? It seems that if the track is moving it generates plenty of noise on it's own. My impression of the Viper is that at that speed the track noise is greater than the exhaust. Getting a sled to stay at 4000 rpm with the belt off is not easy either, even harder with a 2 stroke. Actually I thought it was not recommended to run a sled with the belt off.
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Good question. From what I have read the owner of the sled holds the brake and gives it the gas. Never been tested on a sled myself. Just saw lights go on at 2am so knew I was to loud.
 
It's going to be very nice out tonight so I will get WOT with the MBRP. Also, the MBRP has room for chain adjustment.

Time to lay some stripes on the road :)
 
The reality in WI is, that if the officer does not "like" the sound of your sled and asked to see under the hood and you have an after market can you probably will get a ticket. Now you get to choose to take it to court or not.
 
meklke said:
The reality in WI is, that if the officer does not "like" the sound of your sled and asked to see under the hood and you have an after market can you probably will get a ticket. Now you get to choose to take it to court or not.
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That is the point of the law, try to avoid the above situation. Just not sure if the law as written is very practical. Also, as above you see that an older RX1 failed in stock form.
 
sk-rx1 said:
That is the point of the law, try to avoid the above situation. Just not sure if the law as written is very practical. Also, as above you see that an older RX1 failed in stock form.
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Agree with both of you. If the law or DNR is a is a bad mood or hasn't been laid in awhile, he/she will do whatever they want. I have had aftermarket exhaust on all of my sleds and the only time I was told not to run it was when I was at my friends factory playing in his extra snow covered parking lot. The cop came because someone complained, but really there was nothing he could do because it was industrial property....but I was nice so I left the Nytro sit and he said we could drive the other sleds around though as there was nothing he could do. I showed him under the hood and told them they were all stock (exhaust is out the back of the RX1's and Apex, he didn't know what he was looking at).It was funny cause the people that complained walked over and were questioning why we were still riding and I told them to call the police. Nothing they could do and all the while talking to them, my boys were flying around on sleds kicking up snow :)
 
I was pulled over in Polk County, WI because my OSP can was loud. All he asked if I altered the original muffler. I said no and said I had an aftermarket. He said go ahead since he didn't have a meter to test it. Needless to say I got lucky because I know the OSP wouldn't have passed.
 
OK, tested my MBRP last night and at 4 meters away is 89-90 at idle. On the road at about 15 mph my son read 98 on the meter but think he was too close. My full throttle said 100 dB.
 

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I see they have 84 mentioned, I will have to find out where they are from the sled as 4 meters is not right.

More testing today.
 
Reflective (hard) versus absorbtive (snow) surface? Could also be some sort of averaging time going on as well.

Could they play a clutch side versus exhaust side game as well?
 
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