Not joined yet? Register for free and enjoy features such as alerts, private messaging and viewing latest posts and topics.

OEM //M silencer mod

"M" Specific discussion
Post Reply
User avatar
exdos
Senior Member
Senior Member
Posts: 2789
Joined: Wed Feb 22, 2012 12:58 am

Re: OEM //M silencer mod

Post by exdos » Thu Apr 03, 2014 10:16 am

Jimmybell,

I've just had a watch/listen to Dalecan's video and his exhaust sounds great: it's definitely more characterful (i.e. louder than OEM) but I wouldn't say it pops and crackles. Here's a link to couple of videos of mine, this first one is of my Z3MC (S54 engine) with completely gutted exhausts: http://www.youtube.com/watch?v=lms43vxfz30 and this next one is of my Z4MC with my silencer mod and my modified air-intake: https://www.youtube.com/watch?v=-ZaDO7NbN_Y

gwatson,

Graeme, I agree that the video does show that car exhaust does have lots of pops and crackles. For it to do that, there must be fuel randomly injected when the throttle is closed. Perhaps this is a result of deliberate mapping on behalf of the manufacturers to give owners the pos and crackles that they seem to crave? It certainly doesn't happen like that with any of the BMW models with aftermarket silencers fitted with S54 engines with OEM ECU maps that I've heard.

User avatar
Beedub
Lifer
Lifer
Posts: 10973
Joined: Wed Sep 10, 2008 2:25 pm
Location: Sutton Coldfield

Re: OEM //M silencer mod

Post by Beedub » Thu Apr 03, 2014 12:21 pm

the f-type is actually TUNED to do this...

ESS, evolve, BPM all offer specific TUNES thats have this "feature" , mine kinda burbles but this is definitely something that can be altered via specific tuning.....
www.topwrapz.com - Multi Award Winning - Detailing | Vinyl Wrap | Paint Protection Film Specialists |

User avatar
exdos
Senior Member
Senior Member
Posts: 2789
Joined: Wed Feb 22, 2012 12:58 am

Re: OEM //M silencer mod

Post by exdos » Thu Apr 03, 2014 1:44 pm

Beedub wrote:the f-type is actually TUNED to do this...

ESS, evolve, BPM all offer specific TUNES thats have this "feature" , mine kinda burbles but this is definitely something that can be altered via specific tuning.....
Thanks for that. :thumbsup: That's what I thought. My point is; swapping silencers doesn't produce pops and crackles if the car doesn't produce pops and crackles with OEM silencers.

User avatar
jimmybell
Senior Member
Senior Member
Posts: 2557
Joined: Wed Nov 28, 2012 4:16 pm
Location: SW London

Re: OEM //M silencer mod

Post by jimmybell » Thu Apr 03, 2014 2:23 pm

Just a thought - has anyone tried doing before/after comparisons of volume levels?

I think there's a good simple iphone app that can give a reading.

Got the idea from this vid - which is interesting. Suggests the perforated tubing numbs some sound, i wonder what a full straight pipe would sound like?

https://www.youtube.com/watch?v=3sUx_j56_AM
V12 Vantage S - Hammerhead Silver, Manual, Lightweight Wheels, Exterior Carbon++, Carbon Buckets, AMR Performance Pack.
M135i LCI - ZF8, White, HK Audio, Adaptive
--
GONE Z4 M Coupe, Imola, CSLs
GONE C63 AMG, Black, Performance Pack+, LSD, HK

User avatar
exdos
Senior Member
Senior Member
Posts: 2789
Joined: Wed Feb 22, 2012 12:58 am

Re: OEM //M silencer mod

Post by exdos » Thu Apr 03, 2014 2:29 pm

I've been messing about with modding OEM exhaust systems for a few years now and tried all manner of different configurations and I can tell you a straight through pipe will drive you mad and deaf.

User avatar
ga41
Senior Member
Senior Member
Posts: 2898
Joined: Sun Feb 03, 2008 5:38 am
Location: Paphos

Re: OEM //M silencer mod

Post by ga41 » Thu Apr 03, 2014 2:39 pm

I AM NOT MAD NOR DEAF
-- http://www.freerice.com/ For each answer you get right, they will donate 10 grains of rice to the United Nations World Food Program --
Image

User avatar
gwatson
Senior Member
Senior Member
Posts: 1266
Joined: Tue Aug 21, 2007 1:23 pm
Location: Aberdeenshire

Re: OEM //M silencer mod

Post by gwatson » Thu Apr 03, 2014 2:40 pm

exdos wrote:I've been messing about with modding OEM exhaust systems for a few years now and tried all manner of different configurations and I can tell you a straight through pipe will drive you mad and deaf.
Yeap, I started mine in the garage when the silencers were away, made me giggle for about 20 seconds, but was incredibly loud at just idle, insane when revving. Would be horrendous under load and would cheapen the car in my view.
Current:
E89 SDrive 30i M Sport - Manual
Jaguar F-Type V6S Convertible
E70 X5 30d

Previous:
Z4M Roadster Interlagos Blue
ESS Stage 2 Supercharged E85 3.0

User avatar
ga41
Senior Member
Senior Member
Posts: 2898
Joined: Sun Feb 03, 2008 5:38 am
Location: Paphos

Re: OEM //M silencer mod

Post by ga41 » Thu Apr 03, 2014 2:41 pm

YOU WILL ALL HAVE TO SPEAK UP A BIT
-- http://www.freerice.com/ For each answer you get right, they will donate 10 grains of rice to the United Nations World Food Program --
Image

User avatar
exdos
Senior Member
Senior Member
Posts: 2789
Joined: Wed Feb 22, 2012 12:58 am

Re: OEM //M silencer mod

Post by exdos » Thu Apr 03, 2014 2:50 pm

ga41 wrote:I AM NOT MAD NOR DEAF
We'll be the judge of that. :poke: :rofl:

User avatar
jimmybell
Senior Member
Senior Member
Posts: 2557
Joined: Wed Nov 28, 2012 4:16 pm
Location: SW London

Re: OEM //M silencer mod

Post by jimmybell » Thu Apr 03, 2014 3:11 pm

Hah ok - thanks Exdos. Obviously in Dalecan's pics there is only a short amount of perforated pipe - but he's confident there's no drone so .. should be good :D

I'm impressed with the E92 video.
V12 Vantage S - Hammerhead Silver, Manual, Lightweight Wheels, Exterior Carbon++, Carbon Buckets, AMR Performance Pack.
M135i LCI - ZF8, White, HK Audio, Adaptive
--
GONE Z4 M Coupe, Imola, CSLs
GONE C63 AMG, Black, Performance Pack+, LSD, HK

User avatar
Beedub
Lifer
Lifer
Posts: 10973
Joined: Wed Sep 10, 2008 2:25 pm
Location: Sutton Coldfield

Re: OEM //M silencer mod

Post by Beedub » Thu Apr 03, 2014 3:51 pm

for anyone thats need further confirmation.... This is a offered tuneable feature, may s/c companies and tuners have been offering it for a while now.... they can even offer a backfire feature which even more hurts my soul.

http://www.m3post.com/forums/showthread.php?t=935493


heres the thread on making your car do it.... exactly like the f-typre ETC.... its all tune related,,, why this is a desirable and payable thing now-days ill never no.....
www.topwrapz.com - Multi Award Winning - Detailing | Vinyl Wrap | Paint Protection Film Specialists |

User avatar
ga41
Senior Member
Senior Member
Posts: 2898
Joined: Sun Feb 03, 2008 5:38 am
Location: Paphos

Re: OEM //M silencer mod

Post by ga41 » Thu Apr 03, 2014 4:17 pm

Ha! I think it's brilliant! I'd love me some extra crackles!
-- http://www.freerice.com/ For each answer you get right, they will donate 10 grains of rice to the United Nations World Food Program --
Image

User avatar
gwatson
Senior Member
Senior Member
Posts: 1266
Joined: Tue Aug 21, 2007 1:23 pm
Location: Aberdeenshire

Re: OEM //M silencer mod

Post by gwatson » Thu Apr 03, 2014 4:31 pm

John, just to add, with the roadster and roof down you definitely hear more burble on the over-run once the exhaust is warmed up, than with the roof up or I assume in a coupe. So if the exhaust is louder, I would expect the sound of that to be increased.

I'm not saying it's going to be shooting flames :P
Current:
E89 SDrive 30i M Sport - Manual
Jaguar F-Type V6S Convertible
E70 X5 30d

Previous:
Z4M Roadster Interlagos Blue
ESS Stage 2 Supercharged E85 3.0

User avatar
jimmybell
Senior Member
Senior Member
Posts: 2557
Joined: Wed Nov 28, 2012 4:16 pm
Location: SW London

Re: OEM //M silencer mod

Post by jimmybell » Thu Apr 03, 2014 5:01 pm

I'd definitely concede a roadster likely gets the benefit of extra noise to offset getting cold and wet so much.

Your discs arrived? Vids Vids Vids :D
V12 Vantage S - Hammerhead Silver, Manual, Lightweight Wheels, Exterior Carbon++, Carbon Buckets, AMR Performance Pack.
M135i LCI - ZF8, White, HK Audio, Adaptive
--
GONE Z4 M Coupe, Imola, CSLs
GONE C63 AMG, Black, Performance Pack+, LSD, HK

User avatar
gwatson
Senior Member
Senior Member
Posts: 1266
Joined: Tue Aug 21, 2007 1:23 pm
Location: Aberdeenshire

Re: OEM //M silencer mod

Post by gwatson » Thu Apr 03, 2014 5:35 pm

Roadster gets all the better attributes, looks, sound and ride :lol: :lol: :lol:

Yeah it has :) But need to get the kids down to bed, before I can get out to the garage :(

Will try and get a cold startup video tonight at least! :D
Current:
E89 SDrive 30i M Sport - Manual
Jaguar F-Type V6S Convertible
E70 X5 30d

Previous:
Z4M Roadster Interlagos Blue
ESS Stage 2 Supercharged E85 3.0

Post Reply