WARNING: DECC (EPA) are proposing NEW noise laws.

[j-top paj]

but unfortunately the laws would also make it hard for people doing simple mods to their exhaust that will improve it.
as for the tosspots on the harleys that make that much noise then i have no sympathy for them if they get fined. that much noise is excessive and unnesescary in my opinion

[Shadow]

What a PITA, dont they understand some aftermarket exhausts improve emissions; and make the engine more efficient.

I keep hearing this, but I have yet to see it proven.
Car companies spend billions designing their cars, if it were possible to get more power and better fuel economy from an exhaust while staying within the noise regs then they'd do it.

But you wrote this didnt you?

ffs you are an idiot arent ya

I'd like you to show me an aftermarket exhaust which improves performance, econonomy and emissions while staying within the noise regs.

I don't think you could. No matter how many times you want to misread what I write.

I dont think i can show you one, i doubt many exist, but theres no reason it cant be built.

Cost is a big reason manufacturerers go for LOG style headers, pressed bends, mass manufactured cheap cat's etc.

Go for high flow cats, mandrel bends, extractors, resonators, theres absolutely no reason you cant make an exhaust that beats the OEM system in performance, noise, and emmisions. Just dont cry when the exhaust shop gives you the bill.

[j-top paj]

disapearing posts

[j-top paj]

what the? its back and im not even


















yet

[Fleming]

Highway-Star " thats why you own a Harley" maybe you need a few more years of engineering to find out the difference between a honda and a harley, which is like saying a gq is the same as a 40s......... heres a PIC OF MY OUT OF DATE BIKE http://img.photobucket.com/albums/v692/ ... CBR600.jpg[/quote]

[HotFourOk]

What a PITA, dont they understand some aftermarket exhausts improve emissions; and make the engine more efficient.

I keep hearing this, but I have yet to see it proven.
Car companies spend billions designing their cars, if it were possible to get more power and better fuel economy from an exhaust while staying within the noise regs then they'd do it.

But you wrote this didnt you?

ffs you are an idiot arent ya

I'd like you to show me an aftermarket exhaust which improves performance, econonomy and emissions while staying within the noise regs.

I don't think you could. No matter how many times you want to misread what I write.

I'm not taking sides, but if you redone a OEM system with mandrel bent stainless, different cat and a good quality muffler, you would see gains in power and economy, and the same size pipe would keep the noise to a minimum.


The main reason people use larger diameter pipes on thier exhaust is its cheaper.
It is cheaper to get an 'okay' larger system, than a spot on smaller piped system, as a lot more manufacturing work would go into installing it.
Instead of getting a mandrel bent, finely tuned 2" system with a muffler with good flow and noise properties, it is cheaper for the rice boys to get a 2.5" or 3" system with press bends and a larger cheaper 'performance' muffler.

[Highway-Star]

Highway-Star " thats why you own a Harley" maybe you need a few more years of engineering to find out the difference between a honda and a harley, which is like saying a gq is the same as a 40s......... heres a PIC OF MY OUT OF DATE BIKE http://img.photobucket.com/albums/v692/ ... CBR600.jpg

[/quote]

I'm sorry, I'm not picking up on what your saying? I never tried comparing a Honda and a Harley... I never even mentioned a Honda? The only thing Honda and Harley share in common is that when you buy one, you pay extra just for the 'name'.

Your out of date bike is on an out of date page too bud, it doens't work .

I don't own a harley, and yes some exhausts on them are too loud, but in my opinion (my taste, its not everyones cup of tea, i get that; so dont have a hissy), they can sound nice.

Anyway I think j-top paj pointed out the biggest flaw with any strict law changes, the effect on business.

So continue to enjoy your argument, because there isn't much constructiveness left here!

[Tiny]

What a PITA, dont they understand some aftermarket exhausts improve emissions; and make the engine more efficient.

I keep hearing this, but I have yet to see it proven.
Car companies spend billions designing their cars, if it were possible to get more power and better fuel economy from an exhaust while staying within the noise regs then they'd do it.

Exhaust flows at cruise are a fraction of full power, which is why putting a 3" exhaust on a 1.8L japanese 4 cylinder offers no fuel economy benefit at all.

Don't get me started on those muppets who put an echo chamber on the last 3 inches of their exhaust and claim it's a "performance exhaust".

I hear things like this all the time, car manafactureres spend millions to blah blah blah

imo they spend millions to develop a product that is a happy medium, people dont want a noisy car, they dont want to replace engine soocer coz of a more free flowing filter lets some more in, they dont wantto build a 4wd suspension system that is gun offroad as it effects on road to much

[zagan]

That being copied from a motorcycle forum, I can see a bunch of HD owners chucking a massive shirty, thats why you own a Harley, they sound so pleasant with a de-baffled exhaust.

Harleys don't have any laws on them about the noise they make, from what I have been told by people.

Though sports bikes and everything else does.

that's why they can get away with it, though they have to pull you over then have a look around then work out what to do then fine first before it'd affect anyone really.

[Shadow]

That being copied from a motorcycle forum, I can see a bunch of HD owners chucking a massive shirty, thats why you own a Harley, they sound so pleasant with a de-baffled exhaust.

Harleys don't have any laws on them about the noise they make, from what I have been told by people.

Though sports bikes and everything else does.

that's why they can get away with it, though they have to pull you over then have a look around then work out what to do then fine first before it'd affect anyone really.

bullshit

all motor vehicles are subject to the EPA noise guidlines.

[g60boy]

hmm let me get this striat, all the want to do is get rid of crapy milo tin's and poorly fitted systems? if this is true then its only going to efect "boy racer" and his "fully sic carolla bro" , so i dont see a point to worry about.

[KiwiBacon]

I hear things like this all the time, car manafactureres spend millions to blah blah blah

imo they spend millions to develop a product that is a happy medium, people dont want a noisy car, they dont want to replace engine soocer coz of a more free flowing filter lets some more in, they dont wantto build a 4wd suspension system that is gun offroad as it effects on road to much

If you're prepared to step into a completely different set of compromises, then sure you can improve on one aspect. But it usually involves big tradeoffs in other areas.

For the exhausts you've got emissions (cat converters), noise, backpressure and space. If you want to improve on one from the factory then you'll have to compromise in another.

Traditionally the noise and emissions are the two that go out the door with aftermarket exhausts, but legislation has tightened significantly.

[Tiny]

I hear things like this all the time, car manafactureres spend millions to blah blah blah

imo they spend millions to develop a product that is a happy medium, people dont want a noisy car, they dont want to replace engine soocer coz of a more free flowing filter lets some more in, they dont wantto build a 4wd suspension system that is gun offroad as it effects on road to much

If you're prepared to step into a completely different set of compromises, then sure you can improve on one aspect. But it usually involves big tradeoffs in other areas.

For the exhausts you've got emissions (cat converters), noise, backpressure and space. If you want to improve on one from the factory then you'll have to compromise in another.

Traditionally the noise and emissions are the two that go out the door with aftermarket exhausts, but legislation has tightened significantly.

I dont dissagree that there are comprimises, but its both ways, from aftermarket and from factory gear