Intake resonator?? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

DIE1000DEATHS · 08-11-2012, 02:06 PM

First, I searched...

No, I'm not talking about the "noise generator". I'm curious as to the purpose of this box pointed to in the pic. Is it for harmonics, or some other function? I want to yank it it for underhood cleanliness, but am unsure of its true purpose.. Name: ImageUploadedByTapatalk1344708385.491750.jpg
Views: 12309
Size: 105.1 KB

Name: ImageUploadedByTapatalk1344708385.491750.jpg
Views: 12309
Size: 105.1 KB

Thanks!

Lee358 · 08-11-2012, 02:18 PM

Is that your intake?

Sent from my iPhone using Tapatalk

DIE1000DEATHS · 08-11-2012, 02:50 PM

Quote:

Originally Posted by Lee358

Is that your intake?

Yessir

eriktherod · 08-11-2012, 03:00 PM

Looks so much better without that stupid T-off for the noise generator.

thermobox · 08-11-2012, 03:35 PM

Subaru references the whole part as the "Air Cleaner Case Sub Assy". I would assume it is there for noise and water diversion.

Like the old snorkus they had in the Impreza models.

Floggin Tires · 08-11-2012, 05:01 PM

It be nice to have your intake without the straight section (one piece), and in black.
None the less nice.

wheelhaus · 08-11-2012, 06:27 PM

Quote:

Originally Posted by thermobox

Subaru references the whole part as the "Air Cleaner Case Sub Assy". I would assume it is there for noise and water diversion.

Like the old snorkus they had in the Impreza models.

Maybe, but the Impreza snorkus clearly deflected airflow in such a way that any debris or liquid water would drop into it's gullet. This looks like it's plumbing connects to the side of the filter box, not even a low point or anything... Now I'm also curious wtf it is...

wheelhaus · 08-11-2012, 07:07 PM

Perrin's intake thread says it's a resonator. They have another pic showing the snorkus, but it's more of a nutsack that hangs from the large intake tube, just underneath where the interior noise generator splits off.

ahausheer · 08-11-2012, 07:08 PM

It is a helmholtz resonator. It is there for sound reasons and possibly to tune the resonance of the intake to aid in airflow. There are actually 3 of them, two are smaller and are behind the front bumper, just about all cars have them. They are not for water. Intakes are often finely tuned like an instrument, changing the shape could result in less airflow although I doubt it would make a significant difference. Google helmholtz resonator for more info.

Xanatos · 08-11-2012, 07:33 PM

The resonator helps with the airflow into the engine. As the valves open and close quickly the closing of the valves sends a shockwave of high pressure air back in the opposite direction of airflow. The resonators are made so that the shockwave reaches the end of the intake and bounces back at just the right time to push air in during valve opening.

DIE1000DEATHS · 08-11-2012, 08:10 PM

Thanks all, looks like it's staying for now...

bababooey · 10-15-2014, 04:09 PM

haha just coming across this. did the stock tube & noise maker replace recently with perrin tube. when I did I couldnt figure why that thing was there and ripped off that box that connected to the airbox. cracked the plastic a little bit. and used duct tape to seal it up for the time being.

Turdinator · 10-15-2014, 06:33 PM

Quote:

Originally Posted by bababooey

haha just coming across this. did the stock tube & noise maker replace recently with perrin tube. when I did I couldnt figure why that thing was there and ripped off that box that connected to the airbox. cracked the plastic a little bit. and used duct tape to seal it up for the time being.

You can buy plugs for hole left behind. Looks a lot cleaner that way.

http://www.ft86club.com/forums/showthread.php?t=44579

bababooey · 10-16-2014, 10:50 AM

thanks for the link. i unfortunately broke the rivets but that single plug looks way cleaner than the grey tape currently sealing that end

08-11-2012, 02:06 PM	#1
DIE1000DEATHS TechNINJA Join Date: Jun 2012 Drives: Whiteout MT, 87 Mustang, 09 RUCKUS Location: Detroit, Murder Mitten Posts: 130 Thanks: 73 Thanked 46 Times in 27 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Intake resonator?? First, I searched... No, I'm not talking about the "noise generator". I'm curious as to the purpose of this box pointed to in the pic. Is it for harmonics, or some other function? I want to yank it it for underhood cleanliness, but am unsure of its true purpose.. Thanks!

08-11-2012, 05:01 PM	#6
Floggin Tires Senior Member Join Date: Jun 2012 Drives: ZC6, Junk of ALL sorts Location: Ohio Posts: 516 Thanks: 111 Thanked 288 Times in 171 Posts Mentioned: 7 Post(s) Tagged: 0 Thread(s)	It be nice to have your intake without the straight section (one piece), and in black. None the less nice. __________________ # 1. Always know where your towel is. ZC6-CBS, is home

08-11-2012, 07:08 PM	#9
ahausheer Re-member Join Date: Nov 2011 Drives: Toyota camry Location: S. Cali Posts: 1,001 Thanks: 98 Thanked 292 Times in 152 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	It is a helmholtz resonator. It is there for sound reasons and possibly to tune the resonance of the intake to aid in airflow. There are actually 3 of them, two are smaller and are behind the front bumper, just about all cars have them. They are not for water. Intakes are often finely tuned like an instrument, changing the shape could result in less airflow although I doubt it would make a significant difference. Google helmholtz resonator for more info. __________________ Nothing decays like progress, and nothing preserves like neglect.

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08-11-2012, 02:18 PM	#2
Lee358 Senior Member Join Date: Jun 2012 Drives: nissan frontier, DGM MT BRZ Location: North nj Posts: 1,576 Thanks: 404 Thanked 418 Times in 254 Posts Mentioned: 7 Post(s) Tagged: 0 Thread(s)	Is that your intake? Sent from my iPhone using Tapatalk

08-11-2012, 03:35 PM	#5
thermobox Senior Member Join Date: Feb 2012 Drives: 16 Impreza 5dr CWP Location: Baltimore, Md Posts: 332 Thanks: 5 Thanked 94 Times in 61 Posts Mentioned: 11 Post(s) Tagged: 0 Thread(s)	Subaru references the whole part as the "Air Cleaner Case Sub Assy". I would assume it is there for noise and water diversion. Like the old snorkus they had in the Impreza models.

08-11-2012, 07:07 PM	#8
wheelhaus Join Date: Jul 2012 Drives: 2013 BRZ, 2020 KTM Super Duke 1290R Location: Denver Posts: 1,788 Thanks: 714 Thanked 1,141 Times in 624 Posts Mentioned: 49 Post(s) Tagged: 1 Thread(s)	Perrin's intake thread says it's a resonator. They have another pic showing the snorkus, but it's more of a nutsack that hangs from the large intake tube, just underneath where the interior noise generator splits off.

08-11-2012, 08:10 PM	#11
DIE1000DEATHS TechNINJA Join Date: Jun 2012 Drives: Whiteout MT, 87 Mustang, 09 RUCKUS Location: Detroit, Murder Mitten Posts: 130 Thanks: 73 Thanked 46 Times in 27 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Thanks all, looks like it's staying for now...

10-15-2014, 04:09 PM	#12
bababooey Senior Member Join Date: Sep 2014 Drives: BRZ SWP Limited -6MT Location: HillCountry-TX Posts: 421 Thanks: 145 Thanked 158 Times in 103 Posts Mentioned: 2 Post(s) Tagged: 1 Thread(s)	haha just coming across this. did the stock tube & noise maker replace recently with perrin tube. when I did I couldnt figure why that thing was there and ripped off that box that connected to the airbox. cracked the plastic a little bit. and used duct tape to seal it up for the time being.

10-16-2014, 10:50 AM	#14
bababooey Senior Member Join Date: Sep 2014 Drives: BRZ SWP Limited -6MT Location: HillCountry-TX Posts: 421 Thanks: 145 Thanked 158 Times in 103 Posts Mentioned: 2 Post(s) Tagged: 1 Thread(s)	thanks for the link. i unfortunately broke the rivets but that single plug looks way cleaner than the grey tape currently sealing that end

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