Plugin the sound tube - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Harvey · 05-20-2014, 02:35 PM

I know there's loads of info on plugging the sound tube, but none seem to make it real clear if plugging the tube (blocking it with a plug I mean) as any side effect on air admission... is it better to unplug on the motor side ?

mav1178 · 05-20-2014, 02:37 PM

Been plugged for 20000 miles. Zero impact.

-alex

gramicci101 · 05-20-2014, 02:47 PM

It won't have any effect on air intake. You don't actually get intake air from the sound tube; there is a diaphragm in the box on the passenger side of the engine that transmits vibrations from intake air to cabin air. So you get sound from the intake, but not air.

Harvey · 05-20-2014, 03:50 PM

OK greate, I'll plug mine as less noise in cabin is better

gramicci101 · 05-20-2014, 03:54 PM

You can plug the hole in the passenger-side floorboard with a 7/8" plastic plug that costs about $0.79 at Lowe's. Or with the 12V outlet plug in the glovebox for free. If you want to actually remove the sound tube entirely, you need a 1.25" PVC cap for the intake side and a 3/4" plug for the firewall side.

f0rge · 05-20-2014, 03:59 PM

Quote:

Originally Posted by gramicci101

You can plug the hole in the passenger-side floorboard with a 7/8" plastic plug that costs about $0.79 at Lowe's. Or with the 12V outlet plug in the glovebox for free. If you want to actually remove the sound tube entirely, you need a 1.25" PVC cap for the intake side and a 3/4" plug for the firewall side.

I used the 12v outlet plug from the glove box to plug the tube under the passenger carpet. Whole "mod" took me less than 5 minutes and was so worth it.

cwb48 · 05-20-2014, 04:17 PM

Agreed, much better with the plug. And in the future, if another owner likes the intake sound, he/she can just remove the plug. Think carefully about total removal- it will change (reduce) the volume of the tuned intake, which the engineers made the way it is for technical reasons.

subiestyle · 05-20-2014, 05:09 PM

I think they did that to drown out the crickets.

Harvey · 05-21-2014, 09:41 AM

+1 for plugging it for everyday drives, makes a much smoother sound and a quieter cabin (to listen to music etc.) ...

That been said, once in a while I might remove the plug to get the kind of "sporty sound" the tube brings in!

Funny the salesman didn't tell me about this, because during the tests I did mention to him the fact that the loud/sporty sound was more a con than a pro in my choice (luckily it didn't put me off and now with the plug it sounds great)

fourvalleys · 05-21-2014, 10:00 AM

Quote:

Originally Posted by Harvey

Funny the salesman didn't tell me about this, because during the tests I did mention to him the fact that the loud/sporty sound was more a con than a pro in my choice (luckily it didn't put me off and now with the plug it sounds great)

I guarantee he doesn't know about plugging it.

TM · 05-21-2014, 10:18 AM

When I removed the sound tube from my car, I started to notice significantly louder wind noise from my doors/windows. I think I prefer hearing the nice, smooth induction noises in my cabin than the wind when driving 55mph+.

smbrm · 05-21-2014, 01:51 PM

A modified ear plug with a pull wire seemed like a cheap & cheerful solution! Name: image.jpg
Views: 2391
Size: 233.3 KB

Harvey · 05-21-2014, 05:34 PM

Not bad the ear plug.... I'm currently printing a custom plug with my solidoodle 3D printer!

subiestyle · 05-21-2014, 06:21 PM

That's a fat ear plug. I used 2 to plug mine up with a cap to top it off.

05-20-2014, 02:35 PM	#1
Harvey Senior Member Join Date: May 2014 Drives: Celica 5th Gen, Tiburon 04, GT86 Location: France Posts: 135 Thanks: 2 Thanked 58 Times in 16 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Plugin the sound tube I know there's loads of info on plugging the sound tube, but none seem to make it real clear if plugging the tube (blocking it with a plug I mean) as any side effect on air admission... is it better to unplug on the motor side ?

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05-20-2014, 02:37 PM	#2
mav1178 Senior Member Join Date: Apr 2013 Drives: 2005 Toyota Camry Location: 91745 Posts: 6,562 Thanks: 493 Thanked 6,099 Times in 3,030 Posts Mentioned: 95 Post(s) Tagged: 3 Thread(s)	Been plugged for 20000 miles. Zero impact. -alex

05-20-2014, 02:47 PM	#3
gramicci101 Off Topic Join Date: Feb 2014 Drives: 2014 Subaru BRZ Limited Location: Vegas, baby! Posts: 4,610 Thanks: 2,369 Thanked 4,243 Times in 2,170 Posts Mentioned: 43 Post(s) Tagged: 3 Thread(s)	It won't have any effect on air intake. You don't actually get intake air from the sound tube; there is a diaphragm in the box on the passenger side of the engine that transmits vibrations from intake air to cabin air. So you get sound from the intake, but not air.

05-20-2014, 03:50 PM	#4
Harvey Senior Member Join Date: May 2014 Drives: Celica 5th Gen, Tiburon 04, GT86 Location: France Posts: 135 Thanks: 2 Thanked 58 Times in 16 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	OK greate, I'll plug mine as less noise in cabin is better

05-20-2014, 03:54 PM	#5
gramicci101 Off Topic Join Date: Feb 2014 Drives: 2014 Subaru BRZ Limited Location: Vegas, baby! Posts: 4,610 Thanks: 2,369 Thanked 4,243 Times in 2,170 Posts Mentioned: 43 Post(s) Tagged: 3 Thread(s)	You can plug the hole in the passenger-side floorboard with a 7/8" plastic plug that costs about $0.79 at Lowe's. Or with the 12V outlet plug in the glovebox for free. If you want to actually remove the sound tube entirely, you need a 1.25" PVC cap for the intake side and a 3/4" plug for the firewall side.

05-20-2014, 04:17 PM	#7
cwb48 Senior Member Join Date: Sep 2012 Drives: 2013 FR-s Firestorm Location: Maryland Posts: 113 Thanks: 10 Thanked 26 Times in 19 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Agreed, much better with the plug. And in the future, if another owner likes the intake sound, he/she can just remove the plug. Think carefully about total removal- it will change (reduce) the volume of the tuned intake, which the engineers made the way it is for technical reasons.

05-20-2014, 05:09 PM	#8
subiestyle Senior Member Join Date: Feb 2014 Drives: 2014 Monogram FR-S White MT Location: San Francisco Posts: 433 Thanks: 62 Thanked 106 Times in 68 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	I think they did that to drown out the crickets.

05-21-2014, 09:41 AM	#9
Harvey Senior Member Join Date: May 2014 Drives: Celica 5th Gen, Tiburon 04, GT86 Location: France Posts: 135 Thanks: 2 Thanked 58 Times in 16 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	+1 for plugging it for everyday drives, makes a much smoother sound and a quieter cabin (to listen to music etc.) ... That been said, once in a while I might remove the plug to get the kind of "sporty sound" the tube brings in! Funny the salesman didn't tell me about this, because during the tests I did mention to him the fact that the loud/sporty sound was more a con than a pro in my choice (luckily it didn't put me off and now with the plug it sounds great)

05-21-2014, 01:51 PM	#12
smbrm Senior Member Join Date: May 2010 Drives: Scion FRS Ht Lva(AT) Location: Alberta Posts: 409 Thanks: 30 Thanked 81 Times in 54 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	A modified ear plug with a pull wire seemed like a cheap & cheerful solution!

05-21-2014, 05:34 PM	#13
Harvey Senior Member Join Date: May 2014 Drives: Celica 5th Gen, Tiburon 04, GT86 Location: France Posts: 135 Thanks: 2 Thanked 58 Times in 16 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Not bad the ear plug.... I'm currently printing a custom plug with my solidoodle 3D printer!

05-21-2014, 06:21 PM	#14
subiestyle Senior Member Join Date: Feb 2014 Drives: 2014 Monogram FR-S White MT Location: San Francisco Posts: 433 Thanks: 62 Thanked 106 Times in 68 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	That's a fat ear plug. I used 2 to plug mine up with a cap to top it off.

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