Sound Generator Modification

Ok so sound generator fitted today! grabbed it for a tenner, bargain.


i tested the different bits of foam and opted for the small peice still in, i tried without any and OMFG i felt like part of the asda carpark crew!


one question, probably for SK93 :wink: the fixing clip on the bottom doesnt seem to have anything to get hold of on the 2.5i engine or have i just missed a bit theat i should have taken off?
 
I removed both pieces... WOW very loud! Put the small piece back in and away we go... I'm gonna keep this for a bit. :D
 
it sounds minging with both removed. i started by taking the little bit out and there wasnt much difference, then when i took all of it out i nearly shat myself. it sounded like something was wrong with the car! :P

so i stuffed the little bit back in and that sounds fine :D
 
someone doesnt fancy taking a pic of the bit that the clip on the bottom connects to on the engine block next time they remove it do they?

just so i can check if i have missed a bit when i took it off the other car. thanks in advance
 
sorry rudd.. was on holiday!

the spring clip screws into the parts no3 & 4.
these two get screwed into the engine block first of all, then you can clip the sound gen to it.
if you want, I can take a piccie of it to showyou if it's not clear?
 
any clips of before, after (with one removed) and after (with both removed)?

Haven't even picked up my Z4 coupe yet, and already have a list of things to look at. (this, possible CSLs, aero skirts)
 
this is with both removed:

http://www.blog.ianmellor.co.uk/images/car/sound_generator/Recording4.mp3
http://www.youtube.com/watch#playnext=1&playnext_from=TL&videos=TCVRj3JFP7Y&v=lZOpPyN53pc


that's with one removed:
http://www.youtube.com/watch#v=du-_yGqzaNM&feature=related

thats normal:
http://www.youtube.com/watch#playnext=1&playnext_from=TL&videos=Yfun7aPyXtA&v=4bWplGOnvPo
 
sk93 said:
sorry rudd.. was on holiday!

the spring clip screws into the parts no3 & 4.
these two get screwed into the engine block first of all, then you can clip the sound gen to it.
if you want, I can take a piccie of it to showyou if it's not clear?
Click to expand...


hey sk93, no worries. i took a look at the diagram again and missed the little plastic fixing block. went back to get it and all is good. :D
i ended up taking the little bit of foam out and it sound the best, just slightly louder when you floor it.

combined with my induction kit and DIY RPI (rpi seems to have made the car a little louser) the car sounds quite nice
 
Did this today but I only really notice the difference at top end of the revs, the exhaust seems to out do it in the low revs.

I only took one piece of foam out (nearest to cabin). I didn't even need to remove the unit I just popped the pipe out and pulled the foam out 2 second job :D

One thing I did notice is on my engine the sound generator is mounted different to how the guide shows, maybe due to mine having the N52 engine?
 
PCBung said:
One thing I did notice is on my engine the sound generator is mounted different to how the guide shows, maybe due to mine having the N52 engine?
Click to expand...

Quite likely... if you'd be so kind as to take a few photos and pm them to me, I'd love to add them to this guide
 
Well I take my comments back about the sound enhancement... did abit of overtaking tonight and GEZZ did it sound good lol.

SK93, I'll take some piccys tomoz when I do my car wash.
 
PCBung said:
Well I take my comments back about the sound enhancement... did abit of overtaking tonight and GEZZ did it sound good lol.

SK93, I'll take some piccys tomoz when I do my car wash.
Click to expand...

hehe.. you do only notice it under hard acceleration when you remove just the first bit... which I think is why I like it. :D

cheers for the pics!
 
This is all very well, but can you hear yer Mum calling you downstairs for yer tea? I suspect mine was done already as it sounds like a holed exhaust at low speed. Or it could just be a holed exhaust!
 
Perfect write-up. It was one of the first things I did when I got my Z4 last January! The roar is awesome but the drop in MPG is inevitable :-)

I will probably stick back in one of the two foams as my ears are hurting as well as gas prices have gone up 30% in Greece in the last month :-(
 
PCBung said:
Did this today but I only really notice the difference at top end of the revs, the exhaust seems to out do it in the low revs.

I only took one piece of foam out (nearest to cabin). I didn't even need to remove the unit I just popped the pipe out and pulled the foam out 2 second job :D
Click to expand...


+1 just did this, took 30 seconds to do just taking out the end near the cab. Really impressed with the difference with out going over the top. Mod well worth doing
 
Has anyone else got a buzzing/rattling noise coming from the diaphragm spring within the Sound Gen? It happens on mine at partial throlle, sub-2k rpm... Really does my nut! I thought it was just becuase i took all the foam out (big grins!) but still happens with the small one.

Might have to try a post-facelift one instead :thumbsdown:
 
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