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Re: M3W Exhaust noise damper [Re: The Austrian] #653689
01/08/20 03:00 PM
01/08/20 03:00 PM
Joined: Jul 2007
Posts: 17,394
Suffolk
John V6 Offline
Member of the Inner Circle
John V6  Offline
Member of the Inner Circle

Joined: Jul 2007
Posts: 17,394
Suffolk
I once owned a Guzzi Le Mans MKIII with Lanfanconi pipes i.e. no baffles just expansion chambers. We tested it at work in Vlaardingen, Holland it hit 110 dBa.
Short term I fitted those things that go over sink plug holes to stop hair going down, that gave 15 dBa reduction!
I bought new exhausts eventually.


JohnV6
2006 Indigo Blue Roadster S1
2014 Brooklands Edition Roadster "Brookland's Belle"
Re: M3W Exhaust noise damper [Re: The Austrian] #653769
01/08/20 11:24 PM
01/08/20 11:24 PM
Joined: Sep 2010
Posts: 1,844
Wales
T
Taffmog Offline
Talk Morgan Enthusiast
Taffmog  Offline
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T

Joined: Sep 2010
Posts: 1,844
Wales
In my old rallying days the noise limit was 84 Dba. We used steel wool and an old U2 battery up the exhaust pipe if there was any problems!


1969 4/4
1995 plus 8
2002 Aero S1
2013 M3W
2014 Plus 8
Re: M3W Exhaust noise damper [Re: Taffmog] #653770
02/08/20 12:30 AM
02/08/20 12:30 AM
Joined: Aug 2015
Posts: 894
A
Arwyn Williams Offline
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Arwyn Williams  Offline
Talk Morgan Regular
A

Joined: Aug 2015
Posts: 894
Originally Posted by Taffmog
In my old rallying days the noise limit was 84 Dba. We used steel wool and an old U2 battery up the exhaust pipe if there was any problems!


You sure about that Taffmog? It's current 98 dbA at 2/3 maximum revs.

G701PCA was regularly 96/97 on a 3" Ashley but Ian Williams didnt seem too bothered by it. Neither did Ronnie Roberts, never picked me up on anything on that car!

Arwyn

Re: M3W Exhaust noise damper [Re: The Austrian] #653811
02/08/20 11:37 AM
02/08/20 11:37 AM
Joined: Apr 2017
Posts: 1,170
Staffordshire
IvorMog Offline
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IvorMog  Offline
Has a lot to Say!

Joined: Apr 2017
Posts: 1,170
Staffordshire
Did restricted night road rallies have the same noise restrictions as daytime stage rallies?


Bob

1999 4/4 2 litre Zetec
Re: M3W Exhaust noise damper [Re: The Austrian] #653815
02/08/20 11:40 AM
02/08/20 11:40 AM
Joined: Jul 2007
Posts: 17,394
Suffolk
John V6 Offline
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John V6  Offline
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Suffolk
I don't know but I would think not. In the 80s our Kraft R&D facility in Perlach, Bavaria was in a mixed housing & industrial zone.
The day time noise limit was 86dBa but at night it went to 74dBa ( a lot lower). The condensate traps on the cheese vats were a constant issue & I was in charge of the services so it took many attempts to kill the noise level.


JohnV6
2006 Indigo Blue Roadster S1
2014 Brooklands Edition Roadster "Brookland's Belle"
Re: M3W Exhaust noise damper [Re: The Austrian] #654917
08/08/20 01:06 AM
08/08/20 01:06 AM
Joined: Sep 2010
Posts: 1,844
Wales
T
Taffmog Offline
Talk Morgan Enthusiast
Taffmog  Offline
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T

Joined: Sep 2010
Posts: 1,844
Wales
Yes 84 Arwyn, I think (?), could be 86, I’ll dig out an old blue book to check. That was 1970 - 75, a period when Road rallying was going through a rough patch. My ‘S’ was always near the limit even with twin exhaust boxes. 98 is LOUD ! happy3
Jack Romain did a lot is those days to pacify the locals, eventually leading to banning twin cams, twin DCOE’s, 4 spotlights etc.


1969 4/4
1995 plus 8
2002 Aero S1
2013 M3W
2014 Plus 8
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