MINI2

Paul · Apr 13th, 2003, 12:21 AM

Click on the picture:

Why does the 'tunnel' that brings the air into the air box have the big 'tube' that goes off in a downwards direction and off to the side (just to the right of the blue arrow going around the bend on the cut out section)? Is it some kind of moisture trap? Is it to add some sort of controlled turbulence?

Any ideas?

Adriann001 · Apr 13th, 2003, 12:52 AM

It could be to give a bit of resonance in the system to give a bit of induction noise.

Adriann001 · Apr 13th, 2003, 12:53 AM

Doh too late you beat me to it

Paul · Apr 13th, 2003, 12:59 AM

Quote:

Originally posted by obehave
Someone here posted a good explanation of it.
Couldn't find it. Had something to do with tuning the airflow and resonance.

Cant find any previous post either.

I was wondering, because, on the face of it, you'd think it would be better in terms of airflow to have it just as a pipe straight in?

Maybe it's to hold a load of air in that section which can get 'sucked in' when need, so it's not starved of air at any time, and never 'over supplied' at others? So it's more a case of the intake sucking it in when needed, instead of having a certain amount ramned at it at any one time?

TheBlackKnight · Apr 13th, 2003, 01:24 AM

There is an excellent article on this in 'Mini Magazine' (current issue and last issue) and deals with issues like ram-air and stub stacks and all things air-filter. Looking at it, although I'm no professor, the dynamics of it look like it's to do with optimised airflow. Then again, I could be blowing out hot air (pun fully intended!).

pbraun · Apr 13th, 2003, 01:30 AM

I have no idea! Previous speculations appear, however, to have some credibility.
Paul - Where did you get that cut-away drawing? And, is there more available for the viewing?
Thanks,

Paul · Apr 13th, 2003, 01:45 AM

Quote:

Originally posted by TheBlackKnight
... Looking at it, although I'm no professor, the dynamics of it look like it's to do with optimised airflow...

I figured that much, I'm trying to work out (or see if anyone knows) how that's optimised.

Paul

Garfield · Apr 13th, 2003, 04:37 AM

I'm not sure what it looks like inside, but from Jeepin' offroad days, you always want a significant drain for water. Nothing worse than hydrolock!

Brian

macncheese · Apr 13th, 2003, 05:16 AM

Quote:

Originally posted by Adriann001
It could be to give a bit of resonance in the system to give a bit of induction noise.

Otherway around. I'd guess its to a resonance chamber to reduce intake noise.

--
Cheese

thepilo · Apr 13th, 2003, 08:40 AM

It is called the resonator.. It's there to reduce the sound on the intake. I want to get rid of it.. and make mine louder

Jimbo_Mini · Apr 13th, 2003, 01:19 PM

It's a tuned resonator that's designed to eliminate the whooshing induction noise. My NSX has a similarly designed pre-chamber...most cars have them.

-Jim

Paul · Apr 13th, 2003, 05:24 PM

Quote:

Originally posted by thepilo
It is called the resonator.. It's there to reduce the sound on the intake. I want to get rid of it.. and make mine louder

Well, I have a spare tube, so I was considering some chopping modifications?

friedduck · Apr 14th, 2003, 08:31 AM

Like a Heimholtz resonator? (Search on the web for more info.)

Jeff

Jimbo_Mini · Apr 14th, 2003, 09:00 AM

More like a Helmholz resonator.

-Jim

Dark Silver S · Apr 15th, 2003, 12:28 AM

Paul, if you're tuning, look here. (Hope you understand this stuff.)

For the rest of us doofii:

Quote:

Helmholz Resonator
A device comprised of a volume of air and an opening to the "outside." The internal volume of a speaker cabinet and its port is an example of a Helmholz Resonator. A bottle is another example. Blowing air across the opening will produce a tone because of the air resonating, and the pitch of the tone will be related to the resonant frequency of the volume. In a vented (ported) speaker enclosure the back wave of air from the driver is used to reinforce the front wave at the resonant frequency. This phenomenon is commonly employed to extend the low frequency range of the speaker/enclosure system.

Helmholz Resonators are also employed in acoustics. Enclosing a volume of air (in a box, for example) while allowing limited access to the outside through a series of holes or slits in the surface can create a resonant system that will absorb (or, more accurately, cancel) standing waves and problem frequencies that may be too prominent in a room. If you have one or two frequencies that are too strong in your room a Helmholz Resonator is a very effective way of correcting it.

Apr 13th, 2003, 12:21 AM	#1
Paul Trained Monkey My Classifieds Join Date: Jan 2001 Location: Bedfordshire Local Time: 10:21 PM Posts: 41,220 Offline	Intake/performace/tubing.. why's it like that? Click on the picture: Why does the 'tunnel' that brings the air into the air box have the big 'tube' that goes off in a downwards direction and off to the side (just to the right of the blue arrow going around the bend on the cut out section)? Is it some kind of moisture trap? Is it to add some sort of controlled turbulence? Any ideas? There aint no party like my nana's tea party

Apr 13th, 2003, 12:59 AM	#4 (permalink)
Paul Trained Monkey My Classifieds Join Date: Jan 2001 Location: Bedfordshire Local Time: 10:21 PM Posts: 41,220 Offline	Re: Re: Intake/performace/tubing.. why's it like that? Quote: Originally posted by obehave Someone here posted a good explanation of it. Couldn't find it. Had something to do with tuning the airflow and resonance. Cant find any previous post either. I was wondering, because, on the face of it, you'd think it would be better in terms of airflow to have it just as a pipe straight in? Maybe it's to hold a load of air in that section which can get 'sucked in' when need, so it's not starved of air at any time, and never 'over supplied' at others? So it's more a case of the intake sucking it in when needed, instead of having a certain amount ramned at it at any one time? There aint no party like my nana's tea party

Apr 13th, 2003, 01:24 AM	#5 (permalink)
TheBlackKnight MINI2 Senior Join Date: Feb 2003 Location: London, England Local Time: 10:21 PM Posts: 380 Offline	There is an excellent article on this in 'Mini Magazine' (current issue and last issue) and deals with issues like ram-air and stub stacks and all things air-filter. Looking at it, although I'm no professor, the dynamics of it look like it's to do with optimised airflow. Then again, I could be blowing out hot air (pun fully intended!). MINI Going.....Toyota Supra RZ-S Twin Turbo Coming....Standing Quarter, anyone....?

Apr 13th, 2003, 01:30 AM	#6 (permalink)
pbraun Summer Splasher Join Date: Sep 2001 Location: in or near my MINI Local Time: 05:21 PM Posts: 665 Offline	I have no idea! Previous speculations appear, however, to have some credibility. Paul - Where did you get that cut-away drawing? And, is there more available for the viewing? Thanks, Ride on: http://www.youtube.com/watch?v=w4l65QGCGzY BLOG: http://peterbraunblog.wordpress.com

Apr 13th, 2003, 01:45 AM	#7 (permalink)
Paul Trained Monkey My Classifieds Join Date: Jan 2001 Location: Bedfordshire Local Time: 10:21 PM Posts: 41,220 Offline	Quote: Originally posted by TheBlackKnight ... Looking at it, although I'm no professor, the dynamics of it look like it's to do with optimised airflow... I figured that much, I'm trying to work out (or see if anyone knows) how that's optimised. Paul There aint no party like my nana's tea party

MINI2

Fuel for your MINI obsession

From air-filters to exhausts and all in between, discuss them here

Today
Sponsors	Sponsored Links Registered members do not see Google Ads posts, they can also post messages, pictures, and classified adverts. Register your free account today and become a member of MINI2 - MINI Forum

Apr 13th, 2003, 12:52 AM	#2 (permalink)
Adriann001 MINI2 Regular Join Date: Jan 2003 Local Time: 01:21 AM Posts: 149 Offline	It could be to give a bit of resonance in the system to give a bit of induction noise.

Apr 13th, 2003, 12:53 AM	#3 (permalink)
Adriann001 MINI2 Regular Join Date: Jan 2003 Local Time: 01:21 AM Posts: 149 Offline	Doh too late you beat me to it

Apr 13th, 2003, 04:37 AM	#8 (permalink)
Garfield MINI2 Master Join Date: Aug 2001 Location: Mt. Airy, MD USA Local Time: 04:21 PM Posts: 791 Offline	I'm not sure what it looks like inside, but from Jeepin' offroad days, you always want a significant drain for water. Nothing worse than hydrolock! Brian - 2005 G Stock '05 MINI or it's back to a Miata in C Stock - 2004 G Stock 2nd place Pro Solo, 9th Place Solo II - 2003 STX 5th place Pro Solo, 6th Place Solo II - 2002 H Stock Pro Solo National Champion

Apr 13th, 2003, 05:16 AM	#9 (permalink)
macncheese MINI2 Master Join Date: Apr 2002 Location: New Jersey Local Time: 05:21 PM Posts: 1,224 Offline	Quote: Originally posted by Adriann001 It could be to give a bit of resonance in the system to give a bit of induction noise. Otherway around. I'd guess its to a resonance chamber to reduce intake noise. -- Cheese

Apr 13th, 2003, 08:40 AM	#10 (permalink)
thepilo MINI2 Regular Join Date: Aug 2002 Location: NJ Local Time: 09:21 PM Posts: 288 Offline	It is called the resonator.. It's there to reduce the sound on the intake. I want to get rid of it.. and make mine louder Pilo Racing www.piloracing.com Intakes, Ignitions, Heads, Superchargers and more... stop on in

Apr 13th, 2003, 01:19 PM	#11 (permalink)
Jimbo_Mini MINI2 Regular Join Date: Nov 2002 Location: Southampton, PA, USA Local Time: 04:21 PM Posts: 223 Offline	It's a tuned resonator that's designed to eliminate the whooshing induction noise. My NSX has a similarly designed pre-chamber...most cars have them. -Jim 2003 MCS All Black 1992 NSX Red/Blk 5 spd #0330 1974 Vette 454 4 spd Wht/Blk 1976 Honda Accord 5 spd, 3 door Blue/Blue

Apr 13th, 2003, 05:24 PM	#12 (permalink)
Paul Trained Monkey My Classifieds Join Date: Jan 2001 Location: Bedfordshire Local Time: 10:21 PM Posts: 41,220 Offline	Quote: Originally posted by thepilo It is called the resonator.. It's there to reduce the sound on the intake. I want to get rid of it.. and make mine louder Well, I have a spare tube, so I was considering some chopping modifications? There aint no party like my nana's tea party

Apr 14th, 2003, 08:31 AM	#13 (permalink)
friedduck MINI2 Regular Join Date: Aug 2002 Location: USA Local Time: 05:21 PM Posts: 248 Offline	Like a Heimholtz resonator? (Search on the web for more info.) Jeff

Apr 14th, 2003, 09:00 AM	#14 (permalink)
Jimbo_Mini MINI2 Regular Join Date: Nov 2002 Location: Southampton, PA, USA Local Time: 04:21 PM Posts: 223 Offline	More like a Helmholz resonator. -Jim 2003 MCS All Black 1992 NSX Red/Blk 5 spd #0330 1974 Vette 454 4 spd Wht/Blk 1976 Honda Accord 5 spd, 3 door Blue/Blue

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Rate This Thread
Rate This Thread:

Apr 15th, 2003, 12:28 AM	#15 (permalink)
Dark Silver S Ultimate Stealth Machine Join Date: Apr 2003 Location: Wilkes County NC Local Time: 03:21 PM Posts: 798 Offline	Paul, if you're tuning, look here. (Hope you understand this stuff.) For the rest of us doofii: Quote: Helmholz Resonator A device comprised of a volume of air and an opening to the "outside." The internal volume of a speaker cabinet and its port is an example of a Helmholz Resonator. A bottle is another example. Blowing air across the opening will produce a tone because of the air resonating, and the pitch of the tone will be related to the resonant frequency of the volume. In a vented (ported) speaker enclosure the back wave of air from the driver is used to reinforce the front wave at the resonant frequency. This phenomenon is commonly employed to extend the low frequency range of the speaker/enclosure system. Helmholz Resonators are also employed in acoustics. Enclosing a volume of air (in a box, for example) while allowing limited access to the outside through a series of holes or slits in the surface can create a resonant system that will absorb (or, more accurately, cancel) standing waves and problem frequencies that may be too prominent in a room. If you have one or two frequencies that are too strong in your room a Helmholz Resonator is a very effective way of correcting it. Dark Silver S http://revorg.org/images/mmg.gif Now in Wilkes County NC

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
why's Black 11 no longer available???	Mini Cooper Cabrio	MINI Convertible	2	Mar 4th, 2006 08:43 PM
Is this performace tire in the sport package?	fs-mini	Wheels, Tyres & Brakes	5	Nov 3rd, 2004 11:15 PM
Aftermarket CAI Tubing?	joeinitaly	Engine & Drivetrain Tuning	3	Oct 7th, 2004 08:06 PM
any performace brake pad for 04up MCS?	mobile23	Engine & Drivetrain Tuning	3	Sep 5th, 2004 10:50 PM
Intercooler tubing ground off	L8 Apex	MINI Cooper S	3	Mar 1st, 2003 02:05 PM