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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > DIY Guides > DIY: 335i Exhaust Sound Mod. Better, and even easier than golf tee mod.



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Revlis's Avatar DIY: 335i Exhaust Sound Mod. Better, and even easier than golf tee mod.
Revlis
08-28-2007
OK I know I am not the first to do this, someone had to clue me in, but instead of plugging, crimping, or otherwise disconnecting the vacuum line under the car, just unplug the actuator in the trunk in front of the drivers side tail light. I was a little unclear as to how this works, but it's dead...
  #616  
By Revlis on 06-28-2013, 03:03 AM
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Well my new 335is is here and I'll be doing it again. Never had any trouble before, enjoyed the noise. We do need an E93 and newer sedan walk through though from the sound of it.

Important to remember that this is a tiny little "tweak" really, it's only about noise, there will be no increase, decrease, etc. It might sound faster...
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  #617  
By Jason10481 on 07-23-2013, 12:14 PM
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This is awesome.. has anyone taken it a step further and wired it up to a single/double pole switch up front to turn it on and off quickly and conveniently without having to go into the trunk?
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  #618  
By v1nc86 on 07-23-2013, 12:15 PM
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Quote:
Originally Posted by Jason10481 View Post
This is awesome.. has anyone taken it a step further and wired it up to a single/double pole switch up front to turn it on and off quickly and conveniently without having to go into the trunk?
are u serious? man it takes 10 seconds to plug/unplung it... otherwise buy a JB4 chip and u'll be able to set it on/off front the steering wheel
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  #619  
By Jason10481 on 07-23-2013, 12:38 PM
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Quote:
Originally Posted by v1nc86 View Post
are u serious? man it takes 10 seconds to plug/unplung it... otherwise buy a JB4 chip and u'll be able to set it on/off front the steering wheel
Didn't know you could do it from the steering wheel with JB4! Very cool! Thanks for the info
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  #620  
By v1nc86 on 07-23-2013, 12:46 PM
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  #621  
By cd335i on 07-24-2013, 10:21 PM
Did the harness have to be zip tied down or did you guys just leave it hanging there?
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  #622  
By waterbottle1 on 07-24-2013, 10:46 PM
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easy

easy literally 1 min process.
cold start is noticeably louder,

probably in my head but it feels a loss of power...
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  #623  
By quicktwinturbo on 07-26-2013, 02:55 PM
Did it today.. No error codes.. Not a huge difference but notable difference in start up.. Not sure what the big fuss is all about.. Cool stuff and I don't see why this will hurt car's performance.
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  #624  
By Nixoff on 07-26-2013, 03:26 PM
Hey guys I'm new and got a 08 e92 335i a coupes of weeks ago. My exhaust rattles a little bit on startup but damn it is loud. My dad has a 10 m5 and we were looking at somthing as easy as this to make his exhaust louder but we couldn't find anything so I just decided to try it out since its so easy to do. The first time starting it up with it unplugged there was zero rattle from my exhaust at all. Maybe that can tell me what wrong with it normally but so far doing this DIY has already fixed some things and it makes it sound so much better!
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  #625  
By Nixoff on 07-26-2013, 03:27 PM
Oh and if anyone has expirienced rattle on there's and fixed it please let me know!
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  #626  
By deadmn1337 on 07-26-2013, 04:30 PM
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Quote:
Originally Posted by Nixoff View Post
Oh and if anyone has expirienced rattle on there's and fixed it please let me know!
Most rattle you here through the exhaust on startup is the waste gates. Do you only hear the the rattle on cold starts?
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  #627  
By uberbeast21 on 07-26-2013, 09:25 PM
just tried it but it didnt do much so I put it back, it was worth a try
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  #628  
By Nixoff on 07-27-2013, 02:39 AM
Quote:
Originally Posted by deadmn1337
Quote:
Originally Posted by Nixoff View Post
Oh and if anyone has expirienced rattle on there's and fixed it please let me know!
Most rattle you here through the exhaust on startup is the waste gates. Do you only hear the the rattle on cold starts?
Ya only on startups
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  #629  
By anorphirith on 07-30-2013, 01:06 PM
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Quote:
Originally Posted by Nixoff View Post
Ya only on startups
i did experience a constant rattle even after warm up, it was annoying so i pluged it back in
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  #630  
By v1nc86 on 07-30-2013, 01:12 PM
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me 2 I have rattle on cold start, but it's coming from the exhaust flap... this isn't related to that actuator thing disconnected..

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  #631  
By Bimmer116 on 08-15-2013, 09:55 PM
Link to my car n55 e92 with the mod leave a comment!

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  #632  
By nemesis_M3 on 08-16-2013, 11:13 AM
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ill try this later today
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  #633  
By Beer Brewer on 09-11-2013, 05:37 AM
What a thread! This has been a very entertaining read, and a socio-psychological rumpus as well! I love the posts by those who confuse correlation with causation: "I unplugged my actuator and it started raining. When I plugged it back in, the rain stopped!"

Just one data point to add... I've had mine unplugged for 4000 miles, and amazingly these are the consequences:

The exhaust is louder
My engine has not been destroyed
My cats did not explode
My tailights did not go out
My dealer did not void my warranty
My car did not fail emissions inspection
My car did not gain or lose power

I must be the luckiest guy in the world - I beat the golf tee Gods! Man, I should go get a lottery ticket!
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  #634  
By v1nc86 on 09-11-2013, 05:41 AM
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Quote:
Originally Posted by Beer Brewer View Post
What a thread! This has been a very entertaining read, and a socio-psychological rumpus as well! I love the posts by those who confuse correlation with causation: "I unplugged my actuator and it started raining. When I plugged it back in, the rain stopped!"

Just one data point to add... I've had mine unplugged for 4000 miles, and amazingly these are the consequences:

The exhaust is louder
My engine has not been destroyed
My cats did not explode
My tailights did not go out
My dealer did not void my warranty
My car did not fail emissions inspection
My car did not gain or lose power

I must be the luckiest guy in the world - I beat the golf tee Gods! Man, I should go get a lottery ticket!
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  #635  
By moorlander on 09-19-2013, 10:03 AM
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Quote:
Originally Posted by samjamin View Post
probably answered somewhere in the 26 pages of this thread... but does this have any impact on fuel economy?


I have noticed an increased in mpg since reconnecting the cable. YMMV
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  #636  
By v1nc86 on 09-19-2013, 12:37 PM
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  #637  
By WhiteFury on 09-23-2013, 10:24 PM
My unit is still plugged in and I didn't do the mod yet my flap is always open. Why is this?
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