What is this? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

ROFL it's Waffle · 12-01-2019, 07:12 AM

I never noticed this tube coming off the intake. Where does it go?

JD001 · 12-01-2019, 07:27 AM

It's called an 'Appendix'.. much like the one we all have in our bodies. And like the one we have in our bodies, it can play up! Noise and other foul odours can be attributed to it!!

churchx · 12-01-2019, 07:33 AM

If you are not trolling asking that, it's usually referred here as "soundtube". To pass extra noises into cabin. Some like it (due more engine noise inside w/o bothering others outside), some not (calling that sound artificial, and it passes in also roadnoise), and plug it off (via eg. glovebox cig lighter port cap), or remove this soundtube (for very slight weight savings and some cleanup of engine bay) & plug it's port at intake.

ROFL it's Waffle · 12-01-2019, 08:28 AM

Nope, not trolling. I don't own this car yet. Just noticed the sound tube missing from a lot of forums and videos. So this is that sound tube... So, it's metered air being piped into the cabin for sound? I'm sure there's a checkvalve to prevent any dirty cabin air from getting sucked into the throttle body.

I love mechanical engine sounds. My WRX had this stupid milk jug to muffle the intake sounds.

JD001 · 12-01-2019, 08:37 AM

I swapped out my OEM air filter housing for a CAI but left the sound tube, however, it's still plugged in but blocked.. no sound into the cabin, I prefer this... under the hood it all looks normal.

Captain Snooze · 12-01-2019, 08:39 AM

Quote:

Originally Posted by ROFL it's Waffle

So, it's metered air being piped into the cabin for sound? I'm sure there's a checkvalve to prevent any dirty cabin air from getting sucked into the throttle body.

It is not an open tube. From dodgy memory there is a resonator/membrane at the end of the tube in the cabin that acts as a speaker cone.

ROFL it's Waffle · 12-01-2019, 08:41 AM

https://www.ft86club.com/forums/showthread.php?t=35371

Now I see all the fuss... "Artificial sound," except it's piped into the real sound lol. I'd personally love more.

Captain Snooze · 12-01-2019, 08:42 AM

With speaker tube engine bay an unholy mess.
Without speaker tube engine bay neat and tidy. Just like my forum posts.

Tcoat · 12-01-2019, 11:17 AM

Quote:

Originally Posted by ROFL it's Waffle

https://www.ft86club.com/forums/showthread.php?t=35371

Now I see all the fuss... "Artificial sound," except it's piped into the real sound lol. I'd personally love more.

It is artificial sound that is generated from the real sound.

It works on the same principals as a kazoo.

And sounds just about as good as one.

churchx · 12-01-2019, 11:28 AM

I disagree a bit. It may not sound very well, but without it (and 100% stock exhaust) it sounds even worse, dull, lifeless. Yes, i know, that power/performance is completely same, but after testing with plugging it off, i reverted. Even if it's just subjective placebo feel, car felt slower & less powerful

.
I do agree though, that good aftermarket catback and sountube-delete will result in much better and more pleasant sound, but it costs .. slightly more.

ROFL it's Waffle · 12-01-2019, 11:47 AM

Quote:

Originally Posted by churchx

I disagree a bit. It may not sound very well, but without it (and 100% stock exhaust) it sounds even worse, dull, lifeless. Yes, i know, that power/performance is completely same, but after testing with plugging it off, i reverted. Even if it's just subjective placebo feel, car felt slower & less powerful

.
I do agree though, that good aftermarket catback and sountube-delete will result in much better and more pleasant sound, but it costs .. slightly more.

I'm planning on going the Tomei header/exhaust/tune route as this will be a summer/weekend toy. I'm probably leaving the stock airbox in there for ease of maintenance and access to the MAF and filter.

Sapphireho · 12-01-2019, 11:47 AM

It is one of the dumbest things ever, just short of BMW piping fake engine noise over the radio speakers.

churchx · 12-01-2019, 12:06 PM

Sapphireho: unfortunately that's where world seems going to, with cars required by law laguna-seca like muffling and choice differing only in which specific way fake sounds will be produced. Yes, bmw's playback on stereo is another way. Choose your poison

.
Though madness goes other direction aswell, weren't some US states requesting for hybrid and electric cars to generate fake extra noises to outside, so that it makes pedestrians more aware of cars, no?

ROFL it's Waffle · 12-01-2019, 12:33 PM

Quote:

Originally Posted by Sapphireho

It is one of the dumbest things ever, just short of BMW piping fake engine noise over the radio speakers.

Since you mention it... [ame]https://www.youtube.com/watch?v=00LPlHDP98Q[/ame]

12-01-2019, 07:12 AM	#1
ROFL it's Waffle The guy w/o an FRS or BRZ Join Date: Sep 2019 Drives: '23 GR86 Premium 6MT Halo White Location: Planet Erf Posts: 446 Thanks: 276 Thanked 399 Times in 215 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	What is this? I never noticed this tube coming off the intake. Where does it go? Attached Images

12-01-2019, 08:37 AM	#5
JD001 Senior Member Join Date: Apr 2015 Drives: Subaru BRZ Location: UK Posts: 6,257 Thanks: 7,978 Thanked 6,497 Times in 3,636 Posts Mentioned: 26 Post(s) Tagged: 2 Thread(s)	I swapped out my OEM air filter housing for a CAI but left the sound tube, however, it's still plugged in but blocked.. no sound into the cabin, I prefer this... under the hood it all looks normal. Last edited by JD001; 12-01-2019 at 12:38 PM.

12-01-2019, 08:42 AM	#8
Captain Snooze Because compromise ® Join Date: Jan 2012 Drives: Red Herring Location: australia Posts: 7,817 Thanks: 4,047 Thanked 9,548 Times in 4,194 Posts Mentioned: 60 Post(s) Tagged: 0 Thread(s)	With speaker tube engine bay an unholy mess. Without speaker tube engine bay neat and tidy. Just like my forum posts. __________________ My car is completely stock except for all the mods.

12-01-2019, 07:27 AM	#2
JD001 Senior Member Join Date: Apr 2015 Drives: Subaru BRZ Location: UK Posts: 6,257 Thanks: 7,978 Thanked 6,497 Times in 3,636 Posts Mentioned: 26 Post(s) Tagged: 2 Thread(s)	It's called an 'Appendix'.. much like the one we all have in our bodies. And like the one we have in our bodies, it can play up! Noise and other foul odours can be attributed to it!!

12-01-2019, 07:33 AM	#3
churchx Senior Member Join Date: Mar 2015 Drives: 2014 GT86 Location: Latvia, Riga Posts: 4,334 Thanks: 696 Thanked 2,086 Times in 1,436 Posts Mentioned: 53 Post(s) Tagged: 1 Thread(s)	If you are not trolling asking that, it's usually referred here as "soundtube". To pass extra noises into cabin. Some like it (due more engine noise inside w/o bothering others outside), some not (calling that sound artificial, and it passes in also roadnoise), and plug it off (via eg. glovebox cig lighter port cap), or remove this soundtube (for very slight weight savings and some cleanup of engine bay) & plug it's port at intake.

12-01-2019, 08:28 AM	#4
ROFL it's Waffle The guy w/o an FRS or BRZ Join Date: Sep 2019 Drives: '23 GR86 Premium 6MT Halo White Location: Planet Erf Posts: 446 Thanks: 276 Thanked 399 Times in 215 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Nope, not trolling. I don't own this car yet. Just noticed the sound tube missing from a lot of forums and videos. So this is that sound tube... So, it's metered air being piped into the cabin for sound? I'm sure there's a checkvalve to prevent any dirty cabin air from getting sucked into the throttle body. I love mechanical engine sounds. My WRX had this stupid milk jug to muffle the intake sounds.

12-01-2019, 08:41 AM	#7
ROFL it's Waffle The guy w/o an FRS or BRZ Join Date: Sep 2019 Drives: '23 GR86 Premium 6MT Halo White Location: Planet Erf Posts: 446 Thanks: 276 Thanked 399 Times in 215 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	https://www.ft86club.com/forums/showthread.php?t=35371 Now I see all the fuss... "Artificial sound," except it's piped into the real sound lol. I'd personally love more.

12-01-2019, 11:28 AM	#10
churchx Senior Member Join Date: Mar 2015 Drives: 2014 GT86 Location: Latvia, Riga Posts: 4,334 Thanks: 696 Thanked 2,086 Times in 1,436 Posts Mentioned: 53 Post(s) Tagged: 1 Thread(s)	I disagree a bit. It may not sound very well, but without it (and 100% stock exhaust) it sounds even worse, dull, lifeless. Yes, i know, that power/performance is completely same, but after testing with plugging it off, i reverted. Even if it's just subjective placebo feel, car felt slower & less powerful . I do agree though, that good aftermarket catback and sountube-delete will result in much better and more pleasant sound, but it costs .. slightly more.

12-01-2019, 11:47 AM	#12
Sapphireho Famous Potatoes Join Date: Mar 2016 Drives: '15 ultramarine Location: Idaho Posts: 14,006 Thanks: 5,800 Thanked 19,565 Times in 9,209 Posts Mentioned: 162 Post(s) Tagged: 0 Thread(s)	It is one of the dumbest things ever, just short of BMW piping fake engine noise over the radio speakers.

12-01-2019, 12:06 PM	#13
churchx Senior Member Join Date: Mar 2015 Drives: 2014 GT86 Location: Latvia, Riga Posts: 4,334 Thanks: 696 Thanked 2,086 Times in 1,436 Posts Mentioned: 53 Post(s) Tagged: 1 Thread(s)	Sapphireho: unfortunately that's where world seems going to, with cars required by law laguna-seca like muffling and choice differing only in which specific way fake sounds will be produced. Yes, bmw's playback on stereo is another way. Choose your poison . Though madness goes other direction aswell, weren't some US states requesting for hybrid and electric cars to generate fake extra noises to outside, so that it makes pedestrians more aware of cars, no?

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