Re: Loud exuasts

[Thunder Fox]

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Re: Loud exuasts

old man I met at the Forks told me cops set up a "noise check" there and hand out tickets

 

[N3WMAN]

Re: Loud exuasts

I got pulled over, I told the cop it was stock exhaust "Look right here, stamped, meets EPA noise only 86db!" he let me off with a warning
-Jamie M.

I guess you forgot to mention you gutted the cans?

 

[toysareforboys]

Re: Loud exuasts

I guess you forgot to mention you gutted the cans?

Oh yeah, whops, musta forgot about that

-Jamie M.

 

[AF4iK]

Re: Loud exuasts

I've got a Jardine RT-1 currently and had a Hindle before it. Not sure where they fall on the loudness scale but I've never been hassled about it. Plenty of cruisers out there with far louder and obnoxious pipes and I've never seen a cop turn a head.

About removing the muffler... Dunno about your bike specifically but some engines need a bit of back pressure to make their claimed power. But no, it won't harm your engine.

 

[Iggy76]

Re: Loud exuasts

A lot of the aftermarket exhausts (slip-on's or full systems) meet the noise restrictions in Caledon/Oakville, speaking to the sport bike world that is. In the cruiser world, different story. Some are better than others, but there are a lot of pipes out there that aren't even close. If you are concerned about getting pulled over, make sure that you educate yourself about the rules and how they apply to your bike. There are very specific rules in place. Just because you drive a "sportbike" doesn't mean they are all tested the same way. The restrictions depend on how many cylinders you have, attention owners of: SV650/SV1000/TLRs, any Ducati's, VFR's and VTR's. Different decibel levels for twins and v4's than inline 4's and 6's.

Regarding the question about removing the slip-on all together: be careful. There isn't any difference between a free flowing slip-on and no muffler at all, in theory. I assume you are talking about a GSX-R, since this seems to be a common occurance. It will affect your tuning in the same way, better flowing exhaust tends to lean out the a/f ratio so adjust your tune accordingly. It shouldn't be too different than the shorty Jardine slip-on.

 

[Ricky6R]

Re: Loud exuasts

So what I gather from all this is loud pipes are annoying and just an attention grabber for cops. Great thanks I'll definitely go with something quieter like a yosh.

 

[ZX600]

Re: Loud exuasts

the m4 isnt really all that loud. its a good choise for a street bike.

I have an M4 on my GSXR 750, it isn't loud at all and it looks great, the only reason I changed it for an aftermarket is for the weight of the stock one.

I hate loud exhausts so the M4 is an excellent choice

 

[Basketcase]

Re: Loud exuasts

This video explains why you get lousy performance on open pipes. They are talking about v twins but I'm sure it applies to anything with open pipes or gutted cans.
http://www.youtube.com/watch?v=KjKUKhHQLHg&feature=player_embedded#t=16s
You know the old saying "a little bit of knowledge is a dangerous thing". Gutted cans are a good example of that.

 

[Uberfetus]

Re: Loud exuasts

Run a Yoshimura RS-2 full pipe with no silencer, not sure if it is gutted, but it probably reaches 100+ decibels. Never has a cop pulled me over.

For a loud pipe that is.

 

[Gryphon]

Re: Loud exuasts

This video explains why you get lousy performance on open pipes.

Didn't watch the vid, but it is well-known (for years) that open pipes trade away low-RPM torque for high-RPM horsepower.
You will enjoy your ride a lot more if it is quiet and has good torque - it just "feels" faster and more responsive!
Again, nothing worse than a slow bike that makes loud racket... both for you the rider, AND your fellow citizens.

@ Uberfetus - LoL, you're not riding around on an open-pipe Suz400 @ 100dB are you?
Heheh...

 

[unL33T]

Re: Loud exuasts

Didn't watch the vid, but it is well-known (for years) that open pipes trade away low-RPM torque for high-RPM horsepower.

Keep hearing this everywhere but then when I try to find some concrete facts a lot of things say this is only true if the vehicle isn't tuned properly for the free-er flowing pipes. I haven't watched the video yet because YouTube is blocked at work. Although we do have an unrestricted wifi network I could watch it on... no, back to work.

 

[crankcall]

Re: Loud exuasts

Keep hearing this everywhere but then when I try to find some concrete facts a lot of things say this is only true if the vehicle isn't tuned properly for the free-er flowing pipes. I haven't watched the video yet because YouTube is blocked at work. Although we do have an unrestricted wifi network I could watch it on... no, back to work.

True enough but very few vehicles ever get tuned for straight pipes and more than a few can never really be tuned to run well on open pipes. Theres a lot of engineering in a modern engine that just will never work well on a open pipe without major modification.

Meeting Gov't emission regs, fuel mileage targets and wrapping it all around a complicated electronic control system and some dude with tin snips and a rivet gun is going to core the cans and make it "better", yeah thats how this works.

 

[unL33T]

Re: Loud exuasts

True enough but very few vehicles ever get tuned for straight pipes and more than a few can never really be tuned to run well on open pipes. Theres a lot of engineering in a modern engine that just will never work well on a open pipe without major modification.

Meeting Gov't emission regs, fuel mileage targets and wrapping it all around a complicated electronic control system and some dude with tin snips and a rivet gun is going to core the cans and make it "better", yeah thats how this works.

Well obviously you won't meet emissions without a catalytic converter and it definitely won't be better without a tune. With a tune you still won't meet emissions but the people putting straight pipes on just want power and you can gain that with a tune.

 

[unL33T]

Re: Loud exuasts

Well finally watched the vid. I see they were trying to tune the carb to get better performance and still couldn't so I guess what I read was wrong. Either that, or these guys aren't very good at tuning, heh.

 

[Andreas]

Re: Loud exuasts

Reality is, the noise law is going to spread year after year to communities where people don't want to hear our loud exhaust pipes. I'm still running my stock exhaust 3+ years after I bought the bike brand new.. with no complaints.

In fact, I had more complaints when I ran an aftermarket can on my old bike ... loud.. idled horribly, packing wore quicker... worse gas mileage, stank from fuel, people complained, dogs barked, cops turned their heads etc. That said, I'm all for a nice exhaust if it IS a nice exhaust in terms of craftsmanship, performance AND sound. Problem I find though is that many guys aren't willing to shell out x hundreds or x thousands on a decent can or full system (i won't even go into the debate of whether or not headers are worth it nowadays) ... but too many guys are buying crappy slash cut cans that sound like barf to everyone other than their ears, supporting crappy exhaust manufacturers. With the trend of dBs being a bad thing, the top manufacturers will probably become more and more expensive, driving even more people to buying the cheap, loud exhausts that "look so sick yo!"

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