air silencer box

[jdjg]

Hi there, anyone can please tell me what are the function of this box?, and what are de benefit to take off this box?

Thanks



PART #12


PART #4

[blackxs]

i was gonna be like "ITS FOR TEH HELMHOLTZ"

But its definitely not and I have NO idea what thats for, or where it attaches to

[MATT0404]

It's a silencer for your intake. It quiets the air that is being drawn in through the intake tract. Somewhat like a resonator for an exhaust. Removing it would result in a slight increase in intake sound. That's it.

[jdjg]

Originally Posted by MATT0404

It's a silencer for your intake. It quiets the air that is being drawn in through the intake tract. Somewhat like a resonator for an exhaust. Removing it would result in a slight increase in intake sound. That's it.

Thanks bro......

[Cyrix2k]

Originally Posted by blackxs

i was gonna be like "ITS FOR TEH HELMHOLTZ"

But its definitely not and I have NO idea what thats for, or where it attaches to

actually, it pretty much is. It's a tuned resonator for the intake and might do more than just quiet it; it might aid airflow.

[Paintballistic]

Originally Posted by Cyrix2k

actually, it pretty much is. It's a tuned resonator for the intake and might do more than just quiet it; it might aid airflow.

actually the e46's don't involve this silencer box and have a boot that deletes it from the factory. so its for sound.

[Cyrix2k]

Originally Posted by Paintballistic

actually the e46's don't involve this silencer box and have a boot that deletes it from the factory. so its for sound.

still a tuned resonator and the intake is different, even if it's the same motor. Just like the exhaust.

hmm, some reading for you...
http://planetsoarer.com/resonator/resonator.html

[Kristaps5s]

Look here what someone is did with that box.

YouTube

YouTube

[Blauanzug]

wow sounds better/louder but i am not going to take it out if my performance is reduced. as I assume it would be. BMW wouldn't design a part that cost hundreds of thousands of dollars if it was to only quite it down.

[16valex]

Originally Posted by Blauanzug

wow sounds better/louder but i am not going to take it out if my performance is reduced. as I assume it would be. BMW wouldn't design a part that cost hundreds of thousands of dollars if it was to only quite it down.

Silencer delete is a must for two reasons.
-Easy to remove the air box
-Increase air flow, hints ( lounder ), the same reason as if you have a CAI or the same effect if you have a high flow exhuast system.
If anyone thinks the silencer is tuned to engine performance then why did BMW decided to remove it on all E46 M54 engines? This is fact and not fiction, the reason that it is exist in the 5 series is because BMW treats the 5 series as a luxury car and therefore can not have any loud noise.

[Blauanzug]

hmm then i will have to remove it and give it a shot!

[Cyrix2k]

Please enlighten me as to what your qualifications are for making that statement. I've studied engineering and have evidence contrary to your claims. It is not just there to make the intake quieter. My 318i even has a resonator. You are comparing apples to oranges. What it will do is shift the power band. Heavier cars are generally tuned for more low end power. BTW, "straight" is not best in terms of airflow. Look at the glass packs, they flow like crap and you can see through them. I suggest leaving stuff alone that you don't understand.

Originally Posted by Blauanzug

hmm then i will have to remove it and give it a shot!

If you want the sound, go for it. I wouldn't expect it to make a huge impact.

[jamesdc4]

Originally Posted by Cyrix2k

Please enlighten me as to what your qualifications are for making that statement. I've studied engineering and have evidence contrary to your claims. It is not just there to make the intake quieter. My 318i even has a resonator. You are comparing apples to oranges. What it will do is shift the power band. Heavier cars are generally tuned for more low end power. BTW, "straight" is not best in terms of airflow. Look at the glass packs, they flow like crap and you can see through them. I suggest leaving stuff alone that you don't understand.


If you want the sound, go for it. I wouldn't expect it to make a huge impact.

It's a subtle difference, but members seem to like the results.
By the way, what's your evidence (Just curious)?

[Cyrix2k]

http://planetsoarer.com/resonator/Re...rsAcoustic.htm

^That's one of the better articles easily found online.

[16valex]

[QUOTE=Cyrix2k;17553730]Please enlighten me as to what your qualifications are for making that statement. I've studied engineering and have evidence contrary to your claims. It is not just there to make the intake quieter. My 318i even has a resonator. You are comparing apples to oranges. What it will do is shift the power band. Heavier cars are generally tuned for more low end power. BTW, "straight" is not best in terms of airflow. Look at the glass packs, they flow like crap and you can see through them. I suggest leaving stuff alone that you don't understand.

One word for you RUBBISH.

[Cyrix2k]

That's quite the informed response.

[jamesdc4]

Originally Posted by 16valex

One word for you RUBBISH.

16valex,

Why would you respond this way and not provide any other articles or evidence to support your claim? This is the kind of post that usually sends the thread down the path towards a lock. If you are going to refute a claim, please include some scrap of info. to back up your position.

TIA

[16valex]

Originally Posted by jamesdc4

16valex,

Why would you respond this way and not provide any other articles or evidence to support your claim? This is the kind of post that usually sends the thread down the path towards a lock. If you are going to refute a claim, please include some scrap of info. to back up your position.

TIA

Because it is too insignificant for an in-depth analysis. However, my last take on this issue is that people tends to associate intake resonator with exhuast resonator.
For exhuast resonator you want to keep it to maintain back pressure.
But intake silencer (resonator) you want to remove hints CAI, super charge.
If I have to save my job to prove it then I could probably done it by measuring the intake flow vs RPM vs speed with and without silencer. But 22 years in nanotech lithography machines my gut feeling is without the silencer will have a higher flow.

[Cyrix2k]

BMW uses tuned intake & exhaust systems to increase VE. The intake resonator and that large Y resonator on the 540/M5 (can't comment on the I6s as I'm not familiar with their exhaust) are there to increase VE, not simply reduce noise. Also, one goal of a good exhaust system is to reduce back pressure. I don't know why this myth is perpetuated. A tuned exhuast system creates somewhat of a vacuum that helps evacuate the combustion chamber and helps increase VE. It is also true that a target exhaust gas velocity should be maintained - this is probably where "back pressure" comes in. It is NOT the back pressure that increases efficiency; to the contrary, it decreases VE.

some reading for you.
Springer Handbook for Mechanical Engineering

Other passive effects involving resonator cavaties connected to the intake and exhaust pipes can be used to raise the air flow to the engine.

http://www.physicsforums.com/showthread.php?t=152096

and for back pressure
http://my.prostreetonline.com/forums...ead.php?t=1639

[jamesdc4]

Originally Posted by 16valex

Because it is too insignificant for an in-depth analysis. However, my last take on this issue is that people tends to associate intake resonator with exhuast resonator.
For exhuast resonator you want to keep it to maintain back pressure.
But intake silencer (resonator) you want to remove hints CAI, super charge.
If I have to save my job to prove it then I could probably done it by measuring the intake flow vs RPM vs speed with and without silencer. But 22 years in nanotech lithography machines my gut feeling is without the silencer will have a higher flow.

Thanks for your response.
With all due respect, I would reiterate what I said in my earlier post.

[Kristaps5s]

Anyway its easy to take it of and then take it back if nothing good is hapening