Chad05TL

If you consider horsepower between the TL and other cars, even older cars, whether it be an IROC or a Mustang or a vette with lower horsepower rating, why do all TL's sound crappy like a little 4 cylinder engine? I'll even go one step further to say that ALL TL's with all the various kinds of exhaust systems, they all SOUND ALIKE! (give or take a little)

But not and IROC with only 225 HP! It has less horsepower but sounds a million times better.

Is it the wider pipes? Is the exhaust manifold bigger on an IROC? Does more cubic inches make the exhaust sound better?

Skip to 4:41 sec. and listen. (the best sound ever. Sounds exactly like my old IROC. deep.)
Btw, if you dont have a woofer on your computer sound system, you won't hear anything special

CLtotheTL32

iTrader: (3)

Doesn't the IROC have a V8?

Chad05TL

Yes but what does that have to do with the tone of the exhaust. Specifically, how does that work? The cylinder contains the explosion and then a second stroke pushes out the exhaust. So, what causes the low tone? It can't be the pop from the explosion. Because the explosion is contained. If it was not a contained explosion, then you would not get thrust from the downward force of the piston. So what am I hearing? What causes the sound? Is there "residual sound" left over on the exhaust stroke? Where is IHC? haha

UA6~RBP

I'm no expert when it comes to anything with the engine, but it probably has something to do with all of the resonators and mufflers under our cars. That's why when you delete them with a staged exhaust, it improves the sound.

Considering the Camaro is a sports car and the TL is a family luxury sedan... I don't think you can put up a comparison. 98% of people who own a TL don't care for loud or growly exhaust... in fact, the only people that probably do are on this site...

Chad05TL

Sedan vs. sports car has nothing to do with what makes a deep tone.

Trucks are less sporty than a TL, but most of them today sound better than a TL.

listen to any of these modified TL's. There is no way to make it sound good. They all sound like ricers.
http://www.youtube.com/results?searc...ac.FwZNsxqOmGQ

this is hilarious:

jungy4

It is a family sedan, but considering 6MT is offered with Brembo breaks, it is a sports (or sporty) sedan. I agree, Acura really underdid our exhaust. It's way too quiet. I wish it was as loud as Infiniti factory exhaust.

Just get rid of that middle muffler underneath.

carbngrytl

It's the number of cylinders that make it sound different. The more cylinders you have, the better the exhaust will sound. A V-8 will always have a nice rumble compared to a V-6 or 4 cylinder.

Chad05TL

why

Chad05TL

Cadillac CTS is also a sedan and does it sound better? uh ya. And I would not remove any "middle muffler" because it would probably sound like all those other guys.. "Just louder crap.." haha

UA6~RBP

Well if you aren't happy with it or any of the exhaust options aftermarket for the TL, you always have the option to sell it... I don't really know anyone who bought their TL for the exhaust note.

Chad05TL

16 =) but thanks. I do have the option to sell it. Maybe I should?

SpiderX1016

Nice edit.

Tehvine

Chad05TL

haha well you know he is right. I do have the option to sell. And I really try to avoid telling people what I think.. even though, I dont always hide it very well. haha

CLtotheTL32

iTrader: (3)

I don't see what you're trying to prove here.

A V6 sedan is always going to sound differently than a V8 sports car

Chad05TL

I think all the stupid comments are taking this post off the subject.

I asked some specific scientific questions about why the TL's don't sound good, even with a modified exhaust in the first few posts.

I never said I am trying to prove anything.
I never said I bought it specifically for the exhaust note

The smartest answer I got was someone said an 8 cylinder will always sound better but I asked why and they did not answer.

I know 8 cylinders normally sound better. I even made a general comment about 4 cylinders and rice.

I knew I shouldnt ask technical questions online. haha what am I thinking?

carbngrytl

It's like anything else, different sizes will have different notes. Take speakers for example. A small tweeter will have a high pitched sound, like a 4 cylinder. While a large woofer will have the low rumbling sound like a V-8.

Italiano

This is a dumb thread...really?..why u puttin the TL down when u own one?..there's plenty of people including myself that have awesome sounding exhaust on our TL's....they sound nothing like a 4 cylinder.

MIRANDA89

Stupidthreadisstupid.

Chad05TL

hmm never thought about it like that.

But there are some concepts that I still dont really understand. Like if the combustion chamber is closed then what am I hearing? Is it just air flowing out the exhaust that causes the sound? But if it is just airflow, then why do straight headers sound so loud? and they do sound so loud and pop like the engine is firing. But like my animated gif illustrates, and the cylinder is sealed during the combustion, then what is making the sound? The exhaust stroke? But there is nothing firing on the exhaust stroke.. So what am I hearing?

(warning technical answer required)

Italiano

carbngrytl

Just because the combustion chamber is closed while firing, doesn't mean it's sound proof.

Chad05TL

So, we know lower frequencies have a long wavelength. So, what causes a shorter wavelength in the TL?

Wavelengths are caused by something vibrating. A large woofer has a longer and slower excursion/oscillation. And a tweeter does not move much. And it can create a faster wavelength over a period of time. That by definition is a higher frequencey. Because the shorter the wavelength in time, means it crosses 0 more often and therefore we say it is more frequent. Picture a Sign wave on a chart with + and negative amplitude over Time (t). The more wavelengths you fit into 1 period of "time" (t), if it crosses 0 more often, we say it is more frequent. So it has a higher frequency.

So what causes the sound to oscillate coming out the exhaust? What is the "Woofer" or the "tweeter"?

Bearcat94

@ 0:35.

rptls08

iTrader: (1)

the reason your TL's exhaust doesnt sound good is because you dont have one of these. buy one and you will be happy with your car

Chad05TL

That mustang is not a good representation. In this case I think its the camera quality.

nevertheless, not all 8 cylinders have a deep rumble but most do. For example, I know the LS1 engine has a higher exhaust note then an old IROC. And the TL does too. But the LS1 could be lower if they did a redesign. So,again to my point, why is it not possible to have a TL with a low rumble? haha see these are engineering questions.

A SiQ TL

OP, just curios, what do you think of the exhaust note on the G35's/37's?

AbyssPearlTL

Piston size, amount of cylinders, overall displacement, cylinder head design, exhaust.

Think about it for a while. With the v8 thing, its a bigger explosion, happening more frequently.

DomGSR-T

iTrader: (1)

I have that kind of sound on my TL-S. I have a custom made true true dual exhaust system and still using the rear oem mufflers. The sound is very nice! Better than G35-7. Oem quiet on cruise speed and nice mellow sound on acceleration. I would not go back to stock nice low rpm gain also.

carbngrytl

What he said ^^^

It all depends on the piston size, cylinder stroke, exhaust design etc.

Italiano

THIS THREAD IS

i_love_cars

iTrader: (1)

In addition to piston size, displacement, bore/stroke, angle, the order in which cylinders fire, basically the things that work in conjunction to determine the size of the combustion....

it also has to do with the number of times the exhaust receives pulses from the valves and their intervals. The exhaust gets 4 pulses for every revolution in a V8, but only 3 in a V6 and 2 in a 4 cylinder. It also has to do some with the layout, for example an inline six sounds different from a V6 because inlines typically share one exhaust manifold, while a V6 has to have two.

wtf8269

What these guys said. Firing order also affects it.

jiggad369

A SiQ TL

^

04socalTL

iTrader: (1)

why doesn't my cat growl like a tiger?

justnspace

iTrader: (1)

Only four cats can roar - tiger, lion, leopard and jaguar. The ability to roar depends on the structure of the hyoid bones supporting the larynx in the throat. The roaring cats have an elastic ligament connecting two of the bones that allows for the production of a loud, resonant roar. The rest of the cat species do not have this structure.


So maybe since they can roar, they can't meow. The sound that would normally make a meow, resonates because of those htoid bones and ligaments, and results in a roar.

CLtotheTL32

iTrader: (3)

rockstar143

iTrader: (6)

Justin, that might be your most useful post in your entire Acurazine 'career'

EvilVirus

iTrader: (8)

^ I agree very educational

Anyway, OP horsepower has nothing to do with how it sounds it just like what most of these memebers already mention: Quote ILC "piston size, displacement, bore/stroke, angle, the order in which cylinders fire, basically the things that work in conjunction to determine the size of the combustion...." end quote