think im safe or no?????

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anonomoose

New member
Remember, it only takes one idiot who needs to make MORE NOISE to make the whole sport pay.

Whatcha get out of a can...and extra 20hp at 8,000 rpm? Do you really think it is worth it? And if your head hurts when you get back from a ride, imagine how all the folks who have had nice and quiet feel as they heard you go by in the distances?

Give'm a break....keep within the law and be a good guy! We all thank you for restraining yourself.
 
D

dognvenus

Member
Funny....can't remember ever seeing a Harley on the side of the road getting his straight pipes checked....
just sayn...
 
T

tealracing16

Member
2 things:
1) The highway is a public road, most trails are on private land, if the landowner hates loud cans, we will not be riding next year so bad comparison. If you think that's not true join a club and re-mark a trail that was closed in January due to some idiot trying to get more power from his sled.

2) The standard test for all manufacturers (if I'm remembering back when I was sound testing) was to come into a 150' sound trap at 10 mph, roll into the throttle to wide open in under one second, keep it pinned until after exiting. The microphones are positioned all around the track to get an accurate soundwave pattern, not necessarily just a straight decimal reading. The rule is you can not modify an exhaust, if you put a new pipe/can on they can ticket you. There is no test from 1 meter, 3 meters etc that will give an accurate reading. When we were doing sound testing we were doing it on a variety of surfaces because the JS standard did not have a requirement for the ground surface. If you say you got XX dB at 3 feet was that on concrete? Try it on grass, try it in 12" powder, they will all vary greatly.

Get rid of the loud pipe so we can continue to ride, if you want more power buy a bigger engine.
 
S

sledboy482

Member
Your sound testing thing is something that I never heard of much less worked on. I did spend some time working as a Deputy on a snowmobile patrol program in WI. The testing area is in an open area so tress don't "hold the sound" in giving a false reading. The machine is taken up to a certain RPM after the testing equipment is placed precisely with measurements at height and distance from the machine. It is held at that RPM either by the operator or the testers-if you have two or three working the area. Then the meter reading is shown to the owner of the machine. It is very accurately and fairly done. Bottom line is unless you're racing on a track-best to keep it stock to keep your money in your wallet. I've been out of the patrol for four years now, but the process hasn't changed. And for the machines that don't have an RPM gauge, they have a tool that balances on the sled in a certain spot that will spin when it is at a certain rpm to test the sound level with. So, still accurate and fair.
tealracing16 said:
2 things:
1) The highway is a public road, most trails are on private land, if the landowner hates loud cans, we will not be riding next year so bad comparison. If you think that's not true join a club and re-mark a trail that was closed in January due to some idiot trying to get more power from his sled.

2) The standard test for all manufacturers (if I'm remembering back when I was sound testing) was to come into a 150' sound trap at 10 mph, roll into the throttle to wide open in under one second, keep it pinned until after exiting. The microphones are positioned all around the track to get an accurate soundwave pattern, not necessarily just a straight decimal reading. The rule is you can not modify an exhaust, if you put a new pipe/can on they can ticket you. There is no test from 1 meter, 3 meters etc that will give an accurate reading. When we were doing sound testing we were doing it on a variety of surfaces because the JS standard did not have a requirement for the ground surface. If you say you got XX dB at 3 feet was that on concrete? Try it on grass, try it in 12" powder, they will all vary greatly.

Get rid of the loud pipe so we can continue to ride, if you want more power buy a bigger engine.
Click to expand...
 
T

tealracing16

Member
That sounds like the "field" testing done for the DNR and other agencies. The test I was referring to was the actual test required by the manufacturers, I know I'm missing details but it's been 5 years since I was part of the testing.

The DNR needs a way to check the dB level in the field and there really isn't a way to do a test that is repeatable, but this is just as close. I believe that's why the book says no modifying stock exhaust, kind of a catch all for loud pipes.

I've heard sleds that are loud compared to others right next to them, but how do you compare a four stroke with a two stroke?

Again, if you want to ride on private land, please keep the sled quiet. The club members will thank you.
 
S

sledboy482

Member
Tealracing 16,
Yes that is the field testing. I have never heard of how the Manufacturers do it, so I will assume you are correct. Would be interesting to see that in real life sometime. Thanks for your input then. How's the snow over by Green Bay? Marshfield area has about 8" on the gournd and here we sit-watching the clear skies. Total sadness is setting in!
 
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tealracing16

Member
I actually just moved to New London and we have a bunch of snow, I'm not sure how much but they are grooming and riding a lot. The testing was done at the KRC in Houghton up by the airport, if you ever get a chance when riding up there see if they give tours, it's amazing the winter testing going on there, tires, snowblowers, lots of military type stuff. My folks still live in Green Bay and I would say they have about 6 inches, I think most of the brown county trails are open.

Sorry to hijack your thread!
 
M

Modman440

New member
Received new exhaust today much quieter but still has a nice sound speedwerx guarantees that it will pass any sound test from talking to tech support. Said it closest to stock with all. The power gains of a full race can
 
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