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M3W Exhaust noise damper #653532
31/07/20 12:45 PM
31/07/20 12:45 PM
Joined: Oct 2014
Posts: 4,252
Austria, Vienna area
The Austrian Offline OP
Part of the Furniture
The Austrian  Offline OP
Part of the Furniture

Joined: Oct 2014
Posts: 4,252
Austria, Vienna area
The new owner of my previous M3W got stopped by 👮‍♀️ after two seasons of happy driving.
They had a focus on noisy motorbikes and the stage one kit of the M3W got their attention.
At a test the M3W was 12 db over the top / the approved level. (15 db would have resulted in an immediate loss of road approval)

Any suggestions for a simple fix to get the noise down?
Putting the famous pot cleaning steel sponge into both end-tubes was my first proposal.




Hannes
once: Green M3W; 2013
now: Red 4/4 Sport; 2011
and some practical cars for use in real life
Re: M3W Exhaust noise damper [Re: The Austrian] #653539
31/07/20 12:59 PM
31/07/20 12:59 PM
Joined: Jul 2007
Posts: 17,468
Suffolk
John V6 Offline
Member of the Inner Circle
John V6  Offline
Member of the Inner Circle

Joined: Jul 2007
Posts: 17,468
Suffolk
Yes steel wool is the simplest.


JohnV6
2006 Indigo Blue Roadster S1
2014 Brooklands Edition Roadster "Brookland's Belle"
Re: M3W Exhaust noise damper [Re: The Austrian] #653546
31/07/20 01:59 PM
31/07/20 01:59 PM
Joined: Oct 2019
Posts: 1,080
Aberdeenshire
Image Online content
Has a lot to Say!
Image  Online Content
Has a lot to Say!

Joined: Oct 2019
Posts: 1,080
Aberdeenshire
I have an exhaust insert I carry in my toolkit for the possibility the racer might fail the noise check .... tames the noise well without giving up noticeable power.


This

[Linked Image]

K

Ps ... having reviewed this post I see to my horror that, in spite of using a stainless cap screw to secure the baffle, I have failed to use the corresponding stainless nyloc ..... I can only apologise for both letting myself down so publicly and for any trauma and upset I may have caused members by falling so greivously below Forum standards. smile


Last edited by Image; 31/07/20 02:26 PM.
Re: M3W Exhaust noise damper [Re: The Austrian] #653557
31/07/20 03:50 PM
31/07/20 03:50 PM
Joined: Nov 2018
Posts: 2,079
Northants, UK
TBM Offline
Talk Morgan Expert
TBM  Offline
Talk Morgan Expert

Joined: Nov 2018
Posts: 2,079
Northants, UK
I use those inserts on my chop - short, straight through pipes wiith no silencer. Takes the edge off the noise and stops me setting off the car alarms.....

Previously I tried some exhaust packing material but found it restricted the power considerably.

Last edited by TBM; 31/07/20 03:58 PM.

1972 4/4 4 seater
Too many ratty motorbikes
Re: M3W Exhaust noise damper [Re: The Austrian] #653558
31/07/20 03:57 PM
31/07/20 03:57 PM
Joined: Nov 2018
Posts: 2,079
Northants, UK
TBM Offline
Talk Morgan Expert
TBM  Offline
Talk Morgan Expert

Joined: Nov 2018
Posts: 2,079
Northants, UK
This was before the insert, and shortly after I got her running for the first time


1972 4/4 4 seater
Too many ratty motorbikes
Re: M3W Exhaust noise damper [Re: Image] #653570
31/07/20 04:47 PM
31/07/20 04:47 PM
Joined: Nov 2015
Posts: 2,688
Yorkshire
CooperMan Online content
Talk Morgan Expert
CooperMan  Online Content
Talk Morgan Expert

Joined: Nov 2015
Posts: 2,688
Yorkshire
Originally Posted by Image
I have an exhaust insert I carry in my toolkit for the possibility the racer might fail the noise check .... tames the noise well without giving up noticeable power.


This

[Linked Image]

K

Ps ... having reviewed this post I see to my horror that, in spite of using a stainless cap screw to secure the baffle, I have failed to use the corresponding stainless nyloc ..... I can only apologise for both letting myself down so publicly and for any trauma and upset I may have caused members by falling so greivously below Forum standards. smile




So for your penance, go and stand in the middle of your garden and polish your nuts laugh2 laugh2


Jon M
Re: M3W Exhaust noise damper [Re: The Austrian] #653571
31/07/20 04:49 PM
31/07/20 04:49 PM
Joined: Oct 2019
Posts: 1,080
Aberdeenshire
Image Online content
Has a lot to Say!
Image  Online Content
Has a lot to Say!

Joined: Oct 2019
Posts: 1,080
Aberdeenshire
Some penance .... that's just an average Friday night out here! smile

K

Re: M3W Exhaust noise damper [Re: TBM] #653572
31/07/20 04:53 PM
31/07/20 04:53 PM
Joined: Oct 2019
Posts: 1,080
Aberdeenshire
Image Online content
Has a lot to Say!
Image  Online Content
Has a lot to Say!

Joined: Oct 2019
Posts: 1,080
Aberdeenshire
[u][/u]
Originally Posted by TBM
This was before the insert, and shortly after I got her running for the first time




Do we assume the fact that you haven't been lynched by your neighbours, and aren't posting from prison is all the proof needed that the baffles work?? smile

K

Re: M3W Exhaust noise damper [Re: Image] #653591
31/07/20 06:57 PM
31/07/20 06:57 PM
Joined: Nov 2018
Posts: 2,079
Northants, UK
TBM Offline
Talk Morgan Expert
TBM  Offline
Talk Morgan Expert

Joined: Nov 2018
Posts: 2,079
Northants, UK
Originally Posted by Image
[u][/u]
Originally Posted by TBM
This was before the insert, and shortly after I got her running for the first time




Do we assume the fact that you haven't been lynched by your neighbours, and aren't posting from prison is all the proof needed that the baffles work?? smile

K


They are very understanding smile smile

But yes, the baffles do work (a bit).


1972 4/4 4 seater
Too many ratty motorbikes
Re: M3W Exhaust noise damper [Re: The Austrian] #653656
01/08/20 11:58 AM
01/08/20 11:58 AM
Joined: Feb 2019
Posts: 2,491
Port Orchard, WA.
LightSpeed Online content
Talk Morgan Expert
LightSpeed  Online Content
Talk Morgan Expert

Joined: Feb 2019
Posts: 2,491
Port Orchard, WA.
Interesting Thread and something that the 3 Wheeler section of the Forum might derive some benefit. I know my AR Stage 1 mufflers are pretty loud if I get to foot heavy.


Stephen
2019 M3W piling on the Covid miles

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