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Sound Generator Modification
- Adamski
- Lifer
- Posts: 14280
- Joined: Mon Jul 18, 2011 12:46 pm
- Location: Edinburgh
Re: Sound Generator Modification
TommyGG, only the 3.0i and 3.0si engines had sound generators...
It can be retrofitted to 2.5i if you can source the parts
It can be retrofitted to 2.5i if you can source the parts
Gone: Z4M Coupé|Black Sapphire|OEM CSLs|Aero Skirts|OEM Strut Brace|Nav|Heated Seats|Logic 7 Pro Hi-fi|Bluetooth|Carbon Leather|PDC|BMW Assist|Stubby
Gone: Cherished 2003 3.0i Black Sapphire Roadster
Gone: Cherished 2003 3.0i Black Sapphire Roadster
- TestShoot
- Newbie
- Posts: 8
- Joined: Tue Feb 12, 2013 8:16 pm
- Location: Hollywood, CA, USA
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Re: Sound Generator Modification
Would a CAI eliminate this and what about just capping off the holes on the bulkhead?
Edit, I removed the plug/wad of foam closest to the bulkhead. It required no tools and took under two minutes. Driving around it is hardly noticeable until you mash the pedal, then you are keenly aware of the extra noise. My gf loves it, big smile on her face the whole ride home today.
Edit, I removed the plug/wad of foam closest to the bulkhead. It required no tools and took under two minutes. Driving around it is hardly noticeable until you mash the pedal, then you are keenly aware of the extra noise. My gf loves it, big smile on her face the whole ride home today.
- ap123ap
- Member
- Posts: 207
- Joined: Wed Feb 27, 2013 11:25 pm
Re: Sound Generator Modification
Should be able to give this a go this weekend if all goes to plan with the Zed purchase!
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- Newbie
- Posts: 4
- Joined: Wed Mar 20, 2013 7:29 pm
Re: Sound Generator Modification
Thanks for this! Just removed the foam closest to cabin, took less than 2 minutes with no tools and HOLY HE'LL! Sounds great and love how its still quiet until you're 'enthusiastic'!
04 3.0 SE
- scorcher
- Member
- Posts: 328
- Joined: Sat Feb 23, 2013 2:15 pm
- Location: South Croydon
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Re: Sound Generator Modification
It is THE BEST FREE MOD EVER
04 3.0SE HIDs•Heated Seats•Pro Nav•DSP•TV•Wind Deflector•PDC•Cruise•Folding Mirrors
19" Anthracite CSLs•Eibach Pro Kit•Milltek•Gaptech RCH+•Clear Repeaters
19" Anthracite CSLs•Eibach Pro Kit•Milltek•Gaptech RCH+•Clear Repeaters
- Danderton
- Member
- Posts: 662
- Joined: Sun Mar 31, 2013 11:10 pm
- Location: Bedfordshire
Re: Sound Generator Modification
I've just done this on my car.
I removed the round foam block (about 3 inches long) at the firewall end of the pipe. And it's really loud now.
I didnt take the pipe off altogether, so have no idea if the other bit of foam is still in the other end (as a previous owner may have taken it out).
But any louder and it would be too loud, so I won't be looking to remove the other bit if its in there.
Cheers for the tip, had no idea and it only took 2 minutes to do.
Dan
I removed the round foam block (about 3 inches long) at the firewall end of the pipe. And it's really loud now.
I didnt take the pipe off altogether, so have no idea if the other bit of foam is still in the other end (as a previous owner may have taken it out).
But any louder and it would be too loud, so I won't be looking to remove the other bit if its in there.
Cheers for the tip, had no idea and it only took 2 minutes to do.
Dan
Model: Sterling Grey 3.0i Z4 Roadster
Upgrades: M Steering Wheel : ZHP : 224 Alloys : Black Kidneys : Clear Repeaters : Pioneer X580DAB : Stubby
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- Member
- Posts: 65
- Joined: Wed Aug 26, 2009 7:26 pm
- Location: Bristol
Re: Sound Generator Modification
Just done mine - really is stupidly quick and easy. I probably spent more time unlocking the car and opening the bonnet than doing this mod! Not heard it yet, but from what everyone says I'm pretty damn sure I'll like it...Danderton wrote:...and it only took 2 minutes to do.
Dan
- winny
- Member
- Posts: 281
- Joined: Tue Jul 10, 2012 1:57 pm
Re: Sound Generator Modification
I'm a girl and just taken the 3 inch cylindrical bit of foam out in less than a minute. Going for a drive now to test it!
Sent from my Phablet
Sent from my Phablet
- Terryvision
- Lifer
- Posts: 3490
- Joined: Mon Feb 18, 2013 10:35 pm
Re: Sound Generator Modification
Far to loud for me completely removed, I cut the bulkhead foam in half.... Now perfect for mewinny wrote:I'm a girl and just taken the 3 inch cylindrical bit of foam out in less than a minute. Going for a drive now to test it!
Sent from my Phablet
- winny
- Member
- Posts: 281
- Joined: Tue Jul 10, 2012 1:57 pm
Re: Sound Generator Modification
I thought it was a nice deep roaring sound over 4000 revs... But everyday pootling around is no difference.. I'll be leaving it out
Sent from my Phablet
Sent from my Phablet
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- Newbie
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Re: Sound Generator Modification
Just removed 2 of the foam pieces, and been driving the z4 for about 3 days. I have to admit, the sound is rather embarrasing for a bmw inline 6... there is no "deep roaring sound" beyond 3-4 revs whatsoever. The sound is harsh-metallic. Why would anyone want this sound? Annoying.
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- Member
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- Joined: Wed Aug 26, 2009 7:26 pm
- Location: Bristol
Re: Sound Generator Modification
I think most people find it best with just 1 taken out? That's what I've done and it's just right for me. Almost no change with low engine loads, but a good injection of induction noise when you put your foot down (and without being anti-socially loud on the outside).metrama wrote:Just removed 2 of the foam pieces, and been driving the z4 for about 3 days. I have to admit, the sound is rather embarrasing for a bmw inline 6... there is no "deep roaring sound" beyond 3-4 revs whatsoever. The sound is harsh-metallic. Why would anyone want this sound? Annoying.
I've heard other people say they didn't like both pieces taken out and some who love it, but the best part about this is how easy it is to put back if you don't like it.
- teeps
- Member
- Posts: 120
- Joined: Wed Jan 23, 2013 7:49 pm
- Location: Somerset
Re: Sound Generator Modification
I've been playing around with this for a while now, and here's my opinion. For driving around town or a B road blast, low-ish revs and many gear changes, removing both pieces of foam sounds the best. This is almost unbearable at normal motorway speeds (70mph), where removing only the bulkhead foam works out to be the best option. Anything over about 115-120mph, however, and it's best to have both pieces fitted, or wear ear-plugs. It depends what sort of sound you're after, and that will be affected by how and where you drive your car the most. Take from this what you will, but I've just had to refit BOTH pieces of foam...
Past: 2007 Z4 3.0si SE Coupe
Present: 2007 Z4MC Imola Red
Present: 2007 Z4MC Imola Red
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- Newbie
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- Joined: Fri May 24, 2013 6:18 pm
Re: Sound Generator Modification
Hey, regardless of opinion I think the best part like big_al said, is how easy it is to do this...
I'm new to BMW's in general, and just having fun with my z4... great forum here!
I'm new to BMW's in general, and just having fun with my z4... great forum here!
- si3242
- Newbie
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Re: Sound Generator Modification
Just done this on ours, took the dark grey foam from the airbox end of the tube out first but didn't notice much difference, so have popped that back in and removed the denser white foam bung from the cabin end and we'll see what it sounds like come the morning.
I did find popping the round ring off the cabin end of the pipe first and putting that back into the firewall on its own made it a lot easier to make sure it was sealing properly against it, then just gave the pipe a sturdy shove back into place.
I did find popping the round ring off the cabin end of the pipe first and putting that back into the firewall on its own made it a lot easier to make sure it was sealing properly against it, then just gave the pipe a sturdy shove back into place.