Non-true Dual Exhaust?

[jmw241]

Does anyone know why our car has a dual exhaust set-up? I mean we only have a a 4 banger with a tiny little turbo.....it's not like were flowing a lot... I might try and come up with a single tip solution, idk if it has been done before?

Just looking for some insight, I mean I understand some think it looks better ect. but from a functionality standpoint does it really make any sense?

[jimrobbington]

I think it only looks better, I think a dual-tip, center exhaust like the r32 has would be sick. But as far as perfomance value, I think it has nothing to do with that.

[jmw241]

Idk if a center exhaust would be possible, I dont have an A4 to go look at in my driveway anymore but from what I remember that would be hard to do....

I was thinking of a single tip on the left side....

[jimrobbington]

Maybe it has something to do with emissions. Maybe it needs two mufflers, etc... to meet some sort of regulations

[eskimopunk]

For looks.

[jmw241]

Anyone want to photoshop the ass of a b7 A4 without two tips? With some different tip options?

[Zebman]

Cut off the mufflers, get some turn-downs, then rig an A6 valence to the back. Tah dah, a mean sounding A4 that retains a stock look.

The center tips would be possible, but IMO would be stupid on our car.

[pw211]

Why would you want to undo having two tips? Looks way better imo and its not like it hurts the performance of the car? Or does it?

[jmw241]

I guess to much flow on our cars could actually hurt but I doubt it that the stock exhaust hurts the car. I just think it looks stupid to an extent, tru dual exhaust are designed for v8's....4 bangers should have a single exhaust IMHO...

[B-Time]

I just think it looks stupid to an extent

Dude, you're preaching to the wrong choir. [down]

[jmw241]

Dude, you're preaching to the wrong choir. [down]

How do you figure? Its forums filled with tons of people, maybe you don't like my idea and maybe other don't but there may be some that do, its forum filled with many different like and dislikes....

[Shaboink]

I was thinking about doing this. OEMPL.US can order it for a really good price if I remember correctly. Here is a picture of an avant with it for reference.

http://upload.wikimedia.org/wikipedia/commons/6/6d/Audi_A4_TDI_Avant_(B7,_Facelift_2004–2008)_rear_ MJ.JPG

[jmw241]

Yeah, exactly, something paint matched like that, with some nice tips!


http://www.autocult.com.au/img/gallery/full/997GT3456.jpg

[SDA4]

http://img32.imageshack.us/img32/8046/facepalmuk.jpg (http://img32.imageshack.us/i/facepalmuk.jpg/)

[jmw241]

^^ says the guy with the played out VMR wheels :-D, everything is done so many times these days, gotta change it up a bit don't you think?

[SDA4]

Sure, to each their own.

Definitely give you [up] for uniqueness.

[jmw241]

True, and thanks.

[A4B7Quattro]

^^ says the guy with the played out VMR wheels :-D, everything is done so many times these days, gotta change it up a bit don't you think?

straight pipe that badboy lol

[Msu2312]

hmm

[joshd2012]

Dual exhaust is purely cosmetic. But I definitely would mind someone making a twin-turbo or headers for our engine. [race]

[jimrobbington]

I always liked side exhaust.

[jimrobbington]

Yeah, exactly, something paint matched like that, with some nice tips!


http://www.autocult.com.au/img/gallery/full/997GT3456.jpg

I love these tips, like the Porsches.

[jmw241]

I love these tips, like the Porsches.

Thats exactly what they are, off the Porsche Cayenne.


I like side exhausts too, but again, more for a v8 application, or an aggressive sports car app. I don't think the a4 falls into that category.

[SilverBullets]

i think center, single or double, tipped exhaust look sick... but prob. wouldn't look great on an A4

[davis449]

Dual exhaust looks fucking sick on this car. WTF is with this "dual exhaust only belongs on V8's". That bullshit if I EVER heard it. One of my BIGGEST disappointments with the B8 is the return of single tip. Such a big car and tiny exhaust.


19 Axis Milianos

Yeah, jmw...pot meet kettle.[rolleyes]

[Sales@RAI]

it doesn't have a "true-dual" but rather just a dual exhaust. Definitely for looks, I like it [up]

[arbaz]

Jersey_Anthony has a single tip...because his other side got jacked [>_<]

[Pworld]

the reason i cannot buy a new b8 2.0 is because of it not having dual exhaust. dumbest thing about that car. Yea its for looks, and i like that look. SUE ME!

[Rotond0000]

i think the dual center exhaust is fugly...

[jmw241]

Dual exhaust looks fucking sick on this car. WTF is with this "dual exhaust only belongs on V8's". That bullshit if I EVER heard it. One of my BIGGEST disappointments with the B8 is the return of single tip. Such a big car and tiny exhaust.



Yeah, jmw...pot meet kettle.[rolleyes]

Do you understand why a duel exhaust is needed on v8's? Its a V....each bank has its OWN direct exhaust out of the car, thus more flow. Our car has "1 bank" if you will, only needs one exhaust out of the car. The whole point of a duel exhaust is for more flow, our cars do not need the fake duel exhaust, its only for "looks". I only brought this topic up, questioning the function of a fake-duel exhaust. Its for looks only, imo it looks dumb haha, AUDI was smart in going back to a single tip, it makes sense, its functional and keeps costs down.

Again this is only my opinion and logic here. Single exhaust's for 4 cylinder and single turbo cars, duel exhaust for twin turbo cars . True Duel exhausts for anything that has a V in the engine period, form a functional stand point this is only what makes sense.

Now as to the "pot meet kettle" comment in regards to my Axis Milanos, what are you getting at? They are very rare wheels and are no longer made, hence very unique, k thanks.

[Rotond0000]

lol^ [up]

[brownishwater]

Do you understand why a duel exhaust is needed on v8's? Its a V....each bank has its OWN direct exhaust out of the car, thus more flow. Our car has "1 bank" if you will, only needs one exhaust out of the car. The whole point of a duel exhaust is for more flow, our cars do not need the fake duel exhaust, its only for "looks". I only brought this topic up, questioning the function of a fake-duel exhaust. Its for looks only, imo it looks dumb haha, AUDI was smart in going back to a single tip, it makes sense, its functional and keeps costs down.

Again this is only my opinion and logic here. Single exhaust's for 4 cylinder and single turbo cars, duel exhaust for twin turbo cars . True Duel exhausts for anything that has a V in the engine period, form a functional stand point this is only what makes sense.

Now as to the "pot meet kettle" comment in regards to my Axis Milanos, what are you getting at? They are very rare wheels and are no longer made, hence very unique, k thanks.



You're not doing yourself any favors. I understand its your opinion, but you made your point in the first post, theres no need to elaborate.

Dual exhaust on a 4-cylinder is usually just for looks, but what difference does it make to you if Audi uses a single outlet to keep costs down? Do you think the B8 A4 is any cheaper then the B7 was because it uses a single exhaust tip?

I could go on, but I've wasted enough time on this reply already.

[davis449]

Do you understand why a duel exhaust is needed on v8's? Its a V....each bank has its OWN direct exhaust out of the car, thus more flow. Our car has "1 bank" if you will, only needs one exhaust out of the car. The whole point of a duel exhaust is for more flow, our cars do not need the fake duel exhaust, its only for "looks". I only brought this topic up, questioning the function of a fake-duel exhaust. Its for looks only, imo it looks dumb haha, AUDI was smart in going back to a single tip, it makes sense, its functional and keeps costs down.

Yes I understand what it's functions are, probably more than you do. See there is a exhaust flow that produces more HP and exhaust gas velocity that produces more torque. The key is balance to get a well performing engine. That's why you see some V8 powered cars with single and some with dual. Neither one is "necessary", it strictly depends on what the manufacturer or modifier wants to achieve with the setup. But they can serve a looks purpose and your distorted, unpopular opinion doesn't make a damn bit of difference in the end.


Again this is only my opinion and logic here. Single exhaust's for 4 cylinder and single turbo cars, duel exhaust for twin turbo cars . True Duel exhausts for anything that has a V in the engine period, form a functional stand point this is only what makes sense.

And it is the majority vote that your opinion sucks and logic researched and proven one-sided and wrong.


Now as to the "pot meet kettle" comment in regards to my Axis Milanos, what are you getting at? They are very rare wheels and are no longer made, hence very unique, k thanks.

They were common as fuck until discontinued and played out as well, k fuck yourself.

[eskimopunk]

Do you understand why a dual exhaust is needed on v8's? Its a V....each bank has its OWN direct exhaust out of the car, thus moar flow. Our car has "1 bank" if you will, only needs one exhaust out of the car. The whole point of a dual exhaust is for moar flow, our cars do not need the fake dual exhaust, it's only for "looks". I only brought this topic up, questioning the function of a fake-dual exhaust. It's for looks only, imo it looks dumb haha, AUDI was smart in going back to a single tip, it makes sense, its functional and keeps costs down.

Again this is only my opinion and logic here. Single exhaust's for 4 cylinder and single turbo cars, dual exhaust for twin turbo carstake space from here. True dual exhausts for anything that has a V in the engine period, from a functional stand point this is only what makes sense.

Now as to the "pot meet kettle" comment in regards to my Axis Milanos, what are you getting at? They are very rare wheels and are no longer made, hence very unique, kthxbai.

Fixed. lulz. [;)]

I like the dual exhaust look, but I would also like the weight savings of a single tip exhaust.

[jmw241]

Fixed. lulz. [;)]

I like the dual exhaust look, but I would also like the weight savings of a single tip exhaust.

Thanks for the fix [>_<]


Davis your a bit touchy ehh? Lol "go fuck yourself" thats not nice at all. In fact it just shows how much of an asshole you are! Thanks alot for pointing that out. Also, the Milanos, may have been played out, maybe, but they are very rare at this point, the RS4 reps on the other hand are deff played out.

Well now that my e-peen got a little bigger, I think I'll go stick it in my future single tip A4, Davis, have fun with your twin tip, more tip ftw!

Lmao calm down mang, to each their own I was just pointing some facts out!

[jmw241]

Ohh so back to my original question, "from a functionality standpoint" does the duel exhaust we have make any sense?

[bengtc]

I like the dual exhaust look over the b8 exhaust set up. I like the symmetry looking at the car from the rear

[Alkemix]

Honestly, single side exhaust tip makes our car look duller and DEFINITELY looks more like a family sedan (proven by that picture of the avant) ((Sorry guy who owns that Avant, but it does look pretty boring)). If dull and boring is your goal, then do it. Having a dual tip exhaust does not hinder performance, and in fact sets you up for more flow for larger applications like Stage 2, but if you want to go backwards, why not go wayyyy back and just bolt up the exhaust from a 1982 Honda Civic?

[jmw241]

Honestly, single side exhaust tip makes our car look duller and DEFINITELY looks more like a family sedan (proven by that picture of the avant) ((Sorry guy who owns that Avant, but it does look pretty boring)). If dull and boring is your goal, then do it. Having a dual tip exhaust does not hinder performance, and in fact sets you up for more flow for larger applications like Stage 2, but if you want to go backwards, why not go wayyyy back and just bolt up the exhaust from a 1982 Honda Civic?


Not a bad point, is there anything to back up what your saying to your knowledge, if having the dual exhaust will help performance for say stage 2/+ or even gt3076, then it would be worth it for me to keep the dual.

[JMG]

There are plenty of things on our cars (including my S4) that are there purely for aesthetic purposes. As long as the dual exhaust is actually working to expel exhaust gases and doesn't contradict the function of the car and engine, I don't see a problem with it.

[Alkemix]

Not a bad point, is there anything to back up what your saying to your knowledge, if having the dual exhaust will help performance for say stage 2/+ or even gt3076, then it would be worth it for me to keep the dual.

It's not to say that you couldn't go GT3076 with a 4" single exhaust piping and run that bad boy that way, or you can run it off a dual tip with more moderate piping. It's your choice, but no, I don't have the technical knowledge to form a factual argument, besides my logical one. I am basically regurgitating what I've read about the available Stage 3 kits on the market needing/recommending a modified exhaust. Even knowing that there is debate whether stage 2 itself requires modified exhaust.

I could go into a string of logical arguments based off the school of audizine, but it's shit everyone else has already read. Like turbo spools quicker with less restriction, but lack of back pressure causes issues to components that need a minimum level of backpressure in the system to operate correctly. All performance modifications will increase flow and thus increase back pressure in the exhaust system, etc. You can achieve flow results numerous ways, you could have 2 medium diameter pipes that equal 1 large diameter pipe in flow. You could have 8 small diameter pipes that equal 1 large diameter pipe. The number of pipes doesn't detract from the performance of the piece as long it has been engineered/designed correctly.

You can simply look at it this way. Audi put down the extra dollars and design points to put that extra pipe in there... just for you.

[event]

Since when did everything on a car have to be logical or serve a purpose, other than being pleasing in some form? Also why would you, having no idea what it's going to do go from a dual to single exhaust?

It's engineered for a dual setup and back pressure is important. I don't care to explain further but restricting the R&D'd factory setup based on assumptions seems pretty out there in imo... but somebody please do it and show us the DYNO, I'm all for a good laugh.

[Alkemix]

Since when did everything on a car have to be logical or serve a purpose, other than being pleasing in some form? Also why would you, having no idea what it's going to do go from a dual to single exhaust?

It's engineered for a dual setup and back pressure is important. I don't care to explain further but restricting the R&D'd factory setup based on assumptions seems pretty out there in imo... but somebody please do it and show us the DYNO, I'm all for a good laugh.

I think you're missing the point a little. Maybe i did, but hopefully OP is satisfied with his answers.

[eskimopunk]

Since when did everything on a car have to be logical or serve a purpose, other than being pleasing in some form? Also why would you, having no idea what it's going to do go from a dual to single exhaust?

It's engineered for a dual setup and back pressure is important. I don't care to explain further but restricting the R&D'd factory setup based on assumptions seems pretty out there in imo... but somebody please do it and show us the DYNO, I'm all for a good laugh.

How is getting rid of stock cats and resonator's going to be bad for an exhaust? Are you saying that the rx-7 at the shop I go to that has an ls-1 with dual 3" to single 4" exhaust is restrictive? You don't know the diameter of piping he wants to use and how much of the exhaust he will get rid of. Any exhaust change on this car is good, they're incredibly restrictive stock.

[jmw241]

It's not to say that you couldn't go GT3076 with a 4" single exhaust piping and run that bad boy that way, or you can run it off a dual tip with more moderate piping. It's your choice, but no, I don't have the technical knowledge to form a factual argument, besides my logical one. I am basically regurgitating what I've read about the available Stage 3 kits on the market needing/recommending a modified exhaust. Even knowing that there is debate whether stage 2 itself requires modified exhaust.

I could go into a string of logical arguments based off the school of audizine, but it's shit everyone else has already read. Like turbo spools quicker with less restriction, but lack of back pressure causes issues to components that need a minimum level of backpressure in the system to operate correctly. All performance modifications will increase flow and thus increase back pressure in the exhaust system, etc. You can achieve flow results numerous ways, you could have 2 medium diameter pipes that equal 1 large diameter pipe in flow. You could have 8 small diameter pipes that equal 1 large diameter pipe. The number of pipes doesn't detract from the performance of the piece as long it has been engineered/designed correctly.

You can simply look at it this way. Audi put down the extra dollars and design points to put that extra pipe in there... just for you.


Well put, thank you! [up]

[jimrobbington]

I'm sure if an STI can run a 4" single exhaust there's no reason why we can't either. But with our dual exhaust, there's not many situations you need larger than 2.5". Either way should work. It's all up to taste. Our exhaust might even be louder coming out of one muffler. Go for it, just don't give it a 6" can and make it look ricey.

[davis449]

Thanks for the fix [>_<]


Davis your a bit touchy ehh? Lol "go fuck yourself" thats not nice at all. In fact it just shows how much of an asshole you are! Thanks alot for pointing that out.

I love how it's always "You're an asshole!" when someone like you comes in and posts stupid, untrue bullshit (referring to your analysis of dual exhaust and how it works) instead of "I was wrong and acknowledge that". It's WAY easier to call the guy calling you out an asshole than to admit you don't know what the hell you're talking about.[rolleyes]


Lmao calm down mang, to each their own I was just pointing some facts out!

No, I won't calm down. It's because of people like you with your bullshit posts that this forum has so many "I searched, but couldn't find" threads. You don't know what you're talking about yet you post up your opinions and then later call them facts (I bolded that part of your statement above). The only part of your analysis of dual exhaust and its applications that was right was that "it flows more". The rest will make everyone who reads it dumber for having done so. Also, when you post smart ass comments like "k thanks" after having spouted off useless, uninformed, and thoroughly un-researched crap you should expect to be told to go fuck yourself.

[A4B7Quattro]

i may be wrong but, i thought the less backpressure with a turbo the better?

[davis449]

i may be wrong but, i thought the less backpressure with a turbo the better?

It is. Contrary to what many say, even with turbos, less back pressure is good.

[elwigglero]

So, is it your theory that our stock exhaust is providing too much flow?

I'm pretty happy with the noticable gains from upgrading to a less restrictive than factory exhaust. Why pay money to mod to a less attractive and less capable set up?

[davis449]

So, is it your theory that our stock exhaust is providing too much flow?

I'm pretty happy with the noticable gains from upgrading to a less restrictive than factory exhaust. Why pay money to mod to a less attractive and less capable set up?

Who are you talking to? Just wanna know so I can clarify, if needed.

[event]

How is getting rid of stock cats and resonator's going to be bad for an exhaust? Are you saying that the rx-7 at the shop I go to that has an ls-1 with dual 3" to single 4" exhaust is restrictive? You don't know the diameter of piping he wants to use and how much of the exhaust he will get rid of. Any exhaust change on this car is good, they're incredibly restrictive stock.

Well I wasn't considering piping DIA, but I'm sure it's going to take a bit of trial and error (and money) to get more power out of a single exhaust vs just improving on our dual setup.

[Zebman]

I gotta agree with jmw on this. Our exhaust strikes me as purely aesthetic. It starts from a single pipe, therefore there are no useful scavenging properties to be had by splitting it at the resonator, just looks. Granted I think it looks badass (my APR exhaust hangs like 3" off the ground and is shiney as fuck) but that's up to everybody elses decision.

[eskimopunk]

Well I wasn't considering piping DIA, but I'm sure it's going to take a bit of trial and error (and money) to get more power out of a single exhaust vs just improving on our dual setup.

I think a single 3" would do the job just fine. Single works for the Mk5's.
A dual set up on our cars only gives extra flow AFTER most of the restrictive shit. So a single straight 3" would provide a lot more flow than stock.

[eskimopunk]

And yes, the less back pressure the better.

[jmw241]

I love how it's always "You're an asshole!" when someone like you comes in and posts stupid, untrue bullshit (referring to your analysis of dual exhaust and how it works) instead of "I was wrong and acknowledge that". It's WAY easier to call the guy calling you out an asshole than to admit you don't know what the hell you're talking about.[rolleyes]



No, I won't calm down. It's because of people like you with your bullshit posts that this forum has so many "I searched, but couldn't find" threads. You don't know what you're talking about yet you post up your opinions and then later call them facts (I bolded that part of your statement above). The only part of your analysis of dual exhaust and its applications that was right was that "it flows more". The rest will make everyone who reads it dumber for having done so. Also, when you post smart ass comments like "k thanks" after having spouted off useless, uninformed, and thoroughly un-researched crap you should expect to be told to go fuck yourself.


Truth is you are an asshole, nothing I said was untrue. You got offended because you like two tips better, thats your perogitive, also you told me to "go fuck myself" after I pointed out that the Milanos are not played out because they are rare at this point......your a bit touchy ehhh bro? Go smoke an L or drink a beer and chill out you uptight man u [down]

Cheers to everyone who gave alittle insight into this thread, it's good to get some opinions on this. [up]



I think a single 3" would do the job just fine. Single works for the Mk5's.
A dual set up on our cars only gives extra flow AFTER most of the restrictive shit. So a single straight 3" would provide a lot more flow than stock.

Thats a good point, using RAI's new product with vband's 3 inch back with a custom set-up there after would work well I think too.

[casuso]

Does anyone know why our car has a dual exhaust set-up? I mean we only have a a 4 banger with a tiny little turbo.....it's not like were flowing a lot... I might try and come up with a single tip solution, idk if it has been done before?

Just looking for some insight, I mean I understand some think it looks better ect. but from a functionality standpoint does it really make any sense?

Why?
In that case we should avoid door blades, wheels, front lips, polishing and waxing, and everything that does not give performance.

I understand your point, but the beauty dependes in a big percentage of the symetry, and that is what a dual exhaust gives to the rear end.

[JMG]

I think were just going in circles here. Everyone has expressed their opinion and now we are getting into name-calling territory. With that said.. /thread