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S4 exhaust

PostPosted: Fri May 06, 2005 3:13 pm
by triumphelan
My exhaust box keeps grounding ,I have raised it as high as I can ,it is so badly damaged that I need to replace it .
What does the list think about fitting a in line "bomb" type nearer to the "Y" piece and doing away with the rear box .
Would it be excessively noisy?What about performance?
Regards John S41969 DHC

S4 exhaust

PostPosted: Fri May 06, 2005 3:36 pm
by s2lola
John,

If what you're suggesting is that the "bomb" is the only "muffler" in the
system, I can only say - Too loud!!! Been there, done that.

Cheers,
Bill Tebbutt
-----Original Message-----
From: John Harrison [mailto:***@***.***
Sent: 2005/05/06 11:13
To: ***@***.***
Subject: [LotusElan.net] S4 exhaust


My exhaust box keeps grounding ,I have raised it as high as I can ,it is so
badly damaged that I need to replace it . What does the list think about
fitting a in line "bomb" type nearer to the "Y" piece and doing away with
the rear box . Would it be excessively noisy?What about performance? Regards
John S41969 DHC























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S4 exhaust

PostPosted: Sat May 07, 2005 6:09 am
by triumphelan
Thanks Bill ,another "good " idea out of the window.
----- Original Message -----
From: Bill Tebbutt
To: '***@***.***'
Sent: Friday, May 06, 2005 4:35 PM
Subject: RE: [LotusElan.net] S4 exhaust


John,

If what you're suggesting is that the "bomb" is the only "muffler" in the
system, I can only say - Too loud!!! Been there, done that.

Cheers,
Bill Tebbutt
-----Original Message-----
From: John Harrison [mailto:***@***.***
Sent: 2005/05/06 11:13
To: ***@***.***
Subject: [LotusElan.net] S4 exhaust


My exhaust box keeps grounding ,I have raised it as high as I can ,it is so
badly damaged that I need to replace it . What does the list think about
fitting a in line "bomb" type nearer to the "Y" piece and doing away with
the rear box . Would it be excessively noisy?What about performance? Regards
John S41969 DHC























***********************************************************************************
AVIS DE NON-RESPONSABILITE:
Ce document transmis par courrier electronique est destine uniquement a la personne ou a l'entite a qui il est adresse et peut contenir des
renseignements confidentiels et assujettis au secret professionnel. La
confidentialite et le secret professionnel demeurent malgre l'envoi de ce
document a la mauvaise adresse electronique. Si vous n'etes pas le
destinataire vise ou la personne chargee de remettre ce document a son destinataire, veuillez nous en informer sans delai et detruire ce document ainsi que toute copie qui en aurait ete faite. Toute distribution, reproduction ou autre utilisation de ce document est
strictement interdite. De plus, le Groupe Financiere Banque Nationale et ses filiales ne peuvent pas etre tenus responsables des dommages pouvant etre causes par des virus ou des erreurs de transmission.

DISCLAIMER:
This documentation transmitted by electronic mail is intended for the useof the individual to whom or the entity to which it is addressed
and may contain information which is confidential and privileged.
Confidentiality and privilege are not lost by this documentation having
been sent to the wrong electronic mail address. If you are not the intended recipient or the person responsible for delivering it to the intended recipient please notify the sender immediately and destroy this document as well as any copies of it. Any distribution, reproduction or other use of this document is strictly prohibited. National Bank Financial Group and its affiliates cannot be held liable for any damage that may be caused by virusesor transmission errors.
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S4 exhaust

PostPosted: Mon May 09, 2005 12:23 pm
by type36lotus
Hmmm, On my S3 I have only a 14" "bomb" type muffler and it does not
sound at all loud to me. I have never had it bottom out either. As
such I have been looking for the equal in stainless steel.

Mike geiger
66 S3 Coupe'

--- In ***@***.***, "John Harrison" <johnharrison@d...>
wrote:







*************

contenir des




ce document ainsi que toute copie qui en aurait ete faite. Toute
distribution, reproduction ou autre utilisation de ce document est

dommages pouvant etre causes par des virus ou des erreurs de
transmission.

addressed


the intended recipient please notify the sender immediately and
destroy this document as well as any copies of it. Any distribution,
reproduction or other use of this document is strictly prohibited.
National Bank Financial Group and its affiliates cannot be held
liable for any damage that may be caused by viruses or transmission
errors.

*************




S4 exhaust

PostPosted: Mon May 09, 2005 12:37 pm
by Elan45
John,

I have what you must be calling a "bomb" type muffler on my S3 Elan, but itis fitted in the normal muffler area at the end. This is a Walker brand (at least it used to be available from NAPA) and I have the number recorded. It has angled inlet and outlet so that the muffler sits at an angle of maybe 20degrees, rising at the rear so that the very short tailpipe comes out in the normal location. Compared to the Stebro thing that was on it when I bought it 30 years ago, this system is quiet, but really is quieter that some of the aftermarket devices the Honda boy racers are using. Good sporty sound I think. If you are still interested, I can take you a photo of the installation and dig out the NAPA #.

Roger


----- Original Message -----
From: Bill Tebbutt
To: '***@***.***'
Sent: Friday, May 06, 2005 4:35 PM
Subject: RE: [LotusElan.net] S4 exhaust


John,

If what you're suggesting is that the "bomb" is the only "muffler" in the
system, I can only say - Too loud!!! Been there, done that.

Cheers,
Bill Tebbutt
-----Original Message-----
From: John Harrison [mailto:***@***.***
Sent: 2005/05/06 11:13
To: ***@***.***
Subject: [LotusElan.net] S4 exhaust


My exhaust box keeps grounding ,I have raised it as high as I can ,it is so
badly damaged that I need to replace it . What does the list think about
fitting a in line "bomb" type nearer to the "Y" piece and doing away with
the rear box . Would it be excessively noisy?What about performance? Regards
John S41969 DHC























***********************************************************************************
AVIS DE NON-RESPONSABILITE:
Ce document transmis par courrier electronique est destine uniquement a la personne ou a l'entite a qui il est adresse et peut contenir des
renseignements confidentiels et assujettis au secret professionnel. La
confidentialite et le secret professionnel demeurent malgre l'envoi de cedocument a la mauvaise adresse electronique. Si vous n'etes pas le
destinataire vise ou la personne chargee de remettre ce document a son destinataire, veuillez nous en informer sans delai et detruire ce document ainsi que toute copie qui en aurait ete faite. Toute distribution, reproduction ou autre utilisation de ce document est
strictement interdite. De plus, le Groupe Financiere Banque Nationale et ses filiales ne peuvent pas etre tenus responsables des dommages pouvant etre causes par des virus ou des erreurs de transmission.

DISCLAIMER:
This documentation transmitted by electronic mail is intended for the useof the individual to whom or the entity to which it is addressed
and may contain information which is confidential and privileged.
Confidentiality and privilege are not lost by this documentation having been sent to the wrong electronic mail address. If you are not the intended recipient or the person responsible for delivering it to the intended recipient please notify the sender immediately and destroy this document as well as any copies of it. Any distribution, reproduction or other use of thisdocument is strictly prohibited. National Bank Financial Group and its affiliates cannot be held liable for any damage that may be caused by viruses or transmission errors.
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S4 exhaust

PostPosted: Mon May 09, 2005 1:21 pm
by triumphelan
Mike
Where is the "bomb" located is it at the rear or near to the "Y" piece
Regards John S41969 DHC

----- Original Message -----
From: Michael Geiger
To: ***@***.***
Sent: Monday, May 09, 2005 1:23 PM
Subject: Re: [LotusElan.net] S4 exhaust


Hmmm, On my S3 I have only a 14" "bomb" type muffler and it does not
sound at all loud to me. I have never had it bottom out either. As
such I have been looking for the equal in stainless steel.

Mike geiger
66 S3 Coupe'

--- In ***@***.***, "John Harrison" <johnharrison@d...>
wrote:







*************

contenir des




ce document ainsi que toute copie qui en aurait ete faite. Toute
distribution, reproduction ou autre utilisation de ce document est

dommages pouvant etre causes par des virus ou des erreurs de
transmission.

addressed


the intended recipient please notify the sender immediately and
destroy this document as well as any copies of it. Any distribution,
reproduction or other use of this document is strictly prohibited.
National Bank Financial Group and its affiliates cannot be held
liable for any damage that may be caused by viruses or transmission
errors.

*************


















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***@***.***


S4 exhaust

PostPosted: Mon May 09, 2005 11:22 pm
by type36lotus
In the rear where the original was. I can supply a pic if you want.

Mike G

--- In ***@***.***, "John Harrison"
<johnharrison@d...> wrote:







*















*






S4 exhaust

PostPosted: Tue May 10, 2005 6:14 am
by triumphelan
Yes please ***@***.***
Regards John S41969 DHC
----- Original Message -----
From: Michael Geiger
To: ***@***.***
Sent: Tuesday, May 10, 2005 12:22 AM
Subject: Re: [LotusElan.net] S4 exhaust


In the rear where the original was. I can supply a pic if you want.

Mike G

--- In ***@***.***, "John Harrison"
<johnharrison@d...> wrote:







*















*




















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***@***.***


Intermitent smokey exhaust

PostPosted: Fri May 13, 2005 8:41 am
by tdafforn
Hi guys,
Ever since I have owned my +2 (3 years) I have had an intermitently
smokey exhaust. It generally doesn't smoke excessively, and doesn't
smoke on start up. Just at the odd time when I stop in traffic I can see
it in my rear view mirror. The engine runs with good oil pressure
(>30Psi at idle) and the compressions are within 5lbs across the 4
cylinders (average of 180lbs). The compression is unchanged when I add
oil to the cylinders. The head was rebuilt by the previous owner <10000
miles ago and I have a reciept which includes new guides and seats. The
only other thing I have noticed is that when I see smoking at the rear I
also get a puff out of the engine breather (Observed when running
without it attached). I think the smoke is oil smoke although it is not
intense enough to really tell, although the guy who MOT'd it thought it
was running a little rich.
At the moment I am not too concerned as it isn't effecting the
performance, and next winter may be engine rebuild winter anyway!
Anyone have any thoughts?
Cheers
Tim

--
Dr Tim Dafforn
MRC Fellow
Biosciences
University of Birmingham
Edgbaston
Birmingham
B15 2TT
(0121) 414 5881

Intermitent smokey exhaust

PostPosted: Fri May 13, 2005 12:23 pm
by Lincoln62
Tim

Sounds like valve guides to me. These engines aren't designed to have valve
stem seals so the clearance is critical. They shouldn't wear out in
10000miles but any wear in the guide can potentially let oil go down the
stem and into the exhaust port which will burn and cause smoke.

You won't pick worn guides from a compression test either as guide leakage
happens into the port not the combustion chamber. The oil pressure is a
measure of the health of your pump/bearings and has no relation to the
combustion part of the engine.

Mine made that little puff of smoke for 8 years till I rebuilt the engine
and it has been fine for 14000 miles.

Peter
66S2

----- Original Message -----

Intermitent smokey exhaust

PostPosted: Fri May 13, 2005 1:41 pm
by "e s"
valve guides should be evident on trailing throttle and on startup

weber or stromberg?

weber heads don't have as good an oil drain, which makes me think that situational pooling[like when you are facing up hill] might occur

If you have 30 psi at idle, either it is never hot or your idle is high.....if your idle is high you might not notice a intermittently rich carb, bad needle valve etc



----- Original Message -----
From: "Peter Walker" <***@***.***>
To: ***@***.***
Subject: Re: [LotusElan.net] Intermitent smokey exhaust
Date: Fri, 13 May 2005 22:25:12 +1000



--
_______________________________________________


Intermitent smokey exhaust

PostPosted: Fri May 13, 2005 2:36 pm
by tvacc
Another thing you can try is 20 50 Castrol GTX...may minimize it a bit.



If you are running 10w/30..(don't know that you are) it is awfully thin..



I vote for guides..



Easy fix..pull the head.do a guide and valve job.



Tony V



_____

From: ***@***.***lto:***@***.*** Behalf
Of e s
Sent: Friday, May 13, 2005 9:41 AM
To: ***@***.***
Subject: Re: [LotusElan.net] Intermitent smokey exhaust



valve guides should be evident on trailing throttle and on startup

weber or stromberg?

weber heads don't have as good an oil drain, which makes me think that
situational pooling[like when you are facing up hill] might occur

If you have 30 psi at idle, either it is never hot or your idle is
high.....if your idle is high you might not notice a intermittently rich
carb, bad needle valve etc



----- Original Message -----
From: "Peter Walker" <***@***.***>
To: ***@***.***
Subject: Re: [LotusElan.net] Intermitent smokey exhaust
Date: Fri, 13 May 2005 22:25:12 +1000




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was Intermitent smokey exhaust, now Dellorto mixture

PostPosted: Tue May 17, 2005 11:09 am
by tdafforn
Hi,
Thanks for all the suggestions,
I am currently running 20 50 castrol.
decided to Spend some of the weekend driving the +2 and monitoring the
smoke. Observations are:
Doesn't seem to be smoking any more!
Only change was to lean out the mixture a little as she seemed to be
running a little rich.
Mixture screws at 1 1/2 turns out and she runs fine which makes me think
the idle jets are a little fat?
Changed to the next richer jets from stock when I got the car as it
seemed to be always running lean (lots of poping from the carbs).
Rebuilt the carbs this winter, and now perhaps we're running too rich.
Also have noticed that the engine seems to return to idle from revs a
little slower eg. 1300 -700 rpm in 4-5secs, springs are all tight,
anyone any ideas?
Will put the leaner jets in anyway.

Still get a reasonable amount of smoke from the crank breather, but have
plumbed it back to the air box.
Cheers
Tim



Tony Vaccaro wrote:


--
Dr Tim Dafforn
MRC Fellow
Biosciences
University of Birmingham
Edgbaston
Birmingham
B15 2TT
(0121) 414 5881


--
Dr Tim Dafforn
MRC Fellow
Biosciences
University of Birmingham
Edgbaston
Birmingham
B15 2TT
(0121) 414 5881