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Re: Sound Generator Modification

Posted: Fri Jan 08, 2016 10:34 pm
by DPG
richardaball wrote:Hi,

I want to add a sound generator to my 2.5l Z4.

Please can you tell me what parts do I need exactly to fit one? And if I need to replace any existing parts with 3.0 parts?

I guess I need all the parts shown in this link:

http://www.realoem.com/bmw/enUS/showpar ... Id=13_0999

But is that all or do I need anything else such as a new airbox?

Thanks.
Yeah they are the correct parts, you done need anything else.

I fitted one to my 2.2 and thought it sounded nice with both pieces of foam left in.

Re: Sound Generator Modification

Posted: Sat Feb 20, 2016 3:33 pm
by ro881e
Mind had both pieces removed when I bought it - sounds great when accelerating but on long motorway journeys it's pretty deafening.

If anyone has one of the removed foam inserts spare I would be interested in buying one!

Re: Sound Generator Modification

Posted: Sat Feb 20, 2016 5:12 pm
by mr.tourette
ro881e wrote:Mind had both pieces removed when I bought it - sounds great when accelerating but on long motorway journeys it's pretty deafening.

If anyone has one of the removed foam inserts spare I would be interested in buying one!
bud you could just cut a piece of foam from an old car washing sponge or something along those lines.. I'm guessing most folk would want to keep them for selling on the car and such

Re: Sound Generator Modification

Posted: Sat Feb 20, 2016 6:37 pm
by sw4nny
mr.tourette wrote:
ro881e wrote:Mind had both pieces removed when I bought it - sounds great when accelerating but on long motorway journeys it's pretty deafening.

If anyone has one of the removed foam inserts spare I would be interested in buying one!
bud you could just cut a piece of foam from an old car washing sponge or something along those lines.. I'm guessing most folk would want to keep them for selling on the car and such

Maybe use a piece of foam pipe lagging,
Two bob and a blackies egg from a diy shop :thumbsup:

Re: Sound Generator Modification

Posted: Sat Feb 20, 2016 7:39 pm
by nb67
sw4nny wrote:
mr.tourette wrote:
ro881e wrote:Mind had both pieces removed when I bought it - sounds great when accelerating but on long motorway journeys it's pretty deafening.

If anyone has one of the removed foam inserts spare I would be interested in buying one!
bud you could just cut a piece of foam from an old car washing sponge or something along those lines.. I'm guessing most folk would want to keep them for selling on the car and such

Maybe use a piece of foam pipe lagging,
Two bob and a blackies egg from a diy shop :thumbsup:
Ha ha, off topic here for me but that's a Yorkshire lad right there!!

I say this all the time and people look at me gone out. Possibly because I say 'ten bob and a blackie's egg'.

Where the chuff does that saying come from as I've been saying it man and boy!

Re: Sound Generator Modification

Posted: Sun Feb 21, 2016 11:36 am
by sw4nny
nb67 wrote:
sw4nny wrote:
mr.tourette wrote:
bud you could just cut a piece of foam from an old car washing sponge or something along those lines.. I'm guessing most folk would want to keep them for selling on the car and such

Maybe use a piece of foam pipe lagging,
Two bob and a blackies egg from a diy shop :thumbsup:
Ha ha, off topic here for me but that's a Yorkshire lad right there!!

I say this all the time and people look at me gone out. Possibly because I say 'ten bob and a blackie's egg'.

Where the chuff does that saying come from as I've been saying it man and boy!
No idea where it comes from ,but I too have been using it all my life,dont suppose you get much more Yorkshire than Barnsley :thumbsup:

Sound Generator Modification

Posted: Mon Apr 10, 2017 7:49 pm
by RyanB88
Nice write up, thanks!

Any chance of pictures being updated for this?

Sound Generator Modification

Posted: Thu Apr 20, 2017 9:15 pm
by scooobydont
I have just done this tonight, it takes seconds. There were 3 bits of foam in mine. All out just now. I was skeptical as too the noise but the ROAR over 4000rpm is EPIC. :o

It should be mandatory to try this as it takes seconds to do, costs nothing and is reversible if required.

Sound Generator Modification

Posted: Thu Dec 20, 2018 7:23 pm
by Keith96
This is a great write up.
Small problem I have is the rubber sleeve at the cockpit end of the pipe has slipped back. The pipe itself seems firmly in!!
Would this be ok? Had difficulty getting the cabin end in but managed it with the sleeve seemingly having slipped back abit.

Sound Generator Modification

Posted: Thu Dec 20, 2018 8:12 pm
by Smartbear
I would reassemble correctly in case you get any fumes in the cabin, try some silicone spray on the parts if they seem stuck.
Rob

Sound Generator Modification

Posted: Thu Dec 20, 2018 8:27 pm
by Vornwend
scooobydont wrote: Thu Apr 20, 2017 9:15 pm I have just done this tonight, it takes seconds. There were 3 bits of foam in mine. All out just now. I was skeptical as too the noise but the ROAR over 4000rpm is EPIC.

It should be mandatory to try this as it takes seconds to do, costs nothing and is reversible if required.
I've done this too (and loved it so much have left them out) but pretty sure there were only 2 pieces - one short, one long. Intrigued to know how many there should be??

Sound Generator Modification

Posted: Thu Dec 20, 2018 8:37 pm
by Smartbear
My 3.0si had two pieces of foam :thumbsup:
Rob

Sound Generator Modification

Posted: Sat Dec 22, 2018 11:41 am
by Keith96
Thanks Smartbear
Got the rubber collar back in place. I have the pipe back in at the cabin end. The rubber collar is sitting flush but the pipe didn’t really click into place. Is this normal?

Sound Generator Modification

Posted: Tue Feb 27, 2024 1:21 pm
by BigDaddy
Just tried this now. Large foam out sounded great but was too much at motorway speeds. Put the large one back in and am now going to give the small one out a try.

It’s extremely easy to do this though and if I didn’t have sensitive ears I’d probably have left the big one out, but it actually felt a bit uncomfortable on my ears.

Sound Generator Modification

Posted: Tue Feb 27, 2024 4:43 pm
by enuff_zed
BigDaddy wrote: Tue Feb 27, 2024 1:21 pm Just tried this now. Large foam out sounded great but was too much at motorway speeds. Put the large one back in and am now going to give the small one out a try
I took the piece out of the bulkhead end as it was easy to pull out with the trim lowered under the glovebox. I find it only makes a noise when you accelerate. Very similar to an old K&N air filter on a carburettor. Cruising on a motorway with no real throttle pushing I found it very quiet.