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Wales
by Joske Vermeule, September 1
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Forums39
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Jun 14th, 2026
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There are no members with birthdays on this day. |
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Joined: Dec 2008
Posts: 22,371 Likes: 354
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OP
Roadster Guru Member of the Inner Circle
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They do lose efficiency yes but this one is only probably on 4k miles. Fitted 2019.
DaveW
'05 Red Roadster S1
'16 Yellow (Not the only) Narrow AR GDI Plus 4
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Joined: Aug 2020
Posts: 502
Talk Morgan Regular
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Talk Morgan Regular
Joined: Aug 2020
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I'll consider that option Richard thanks....pop me a PM please about how much you want for it, and remind me how far away you are!
The MOT day was scorching hot, and my cat is triple wrapped so it shouldn't really be a heat issue, but then again, a baffled silencer would ease the noise a bit.
I've never seen the temp gauge at 110c before, but the Sifab rad handled it well. We were using prolonged revs because, as you probably know, the sensor counts down over maybe 30 seconds, and it's a race between the clock and the needles on the screen which do come into the green just in time but its very close.
Oh, and the irony is that my S1 Roadster has all three needles rock solid at the "green end" of the scale whether ticking over, or revving. Hi Dave. What did you wrap the cat with and what is the purpose?
2004 Series 1 Roadster
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Joined: Jul 2007
Posts: 27,840 Likes: 764
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The reaction is a first order rate reaction i.e the catalyst works better the hotter it is within reason as melting it won't help. Hence the wrap. I guess you use exhaust manifold tape.
This iwhy the lambda sensor have an eror code for low temperature.
JohnV6
2022 CX Plus Four
2025 Renault Scenic Alpine etech "Yvette"
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Joined: Sep 2011
Posts: 14,749 Likes: 158
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Dave. I am on holidays and I just saw this post. Personally I think that the quality and size of the cats used by, or supplied to Morgan, are marginally fit for purpose. I also had absolutely negative results from trying to contact the manufacturer. I suspect that they are not interested in talking to end users. It might be worth reading my post at http://www.talkmorgan.com/ubbthreads.php/topics/432639/a-tale-of-3-catsAs you will see I replaced the original cat with a larger capacity and better quality cat. The car, some years later, recently passed an emissions test with no problems.
Peter ![[Linked Image]](http://bradley.it/public_images/drive.jpg)
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Joined: Dec 2008
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Thanks Peter. I'll digest that when I get home.
DaveW
'05 Red Roadster S1
'16 Yellow (Not the only) Narrow AR GDI Plus 4
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Joined: Dec 2010
Posts: 158 Likes: 4
L - Learner Plates On
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L - Learner Plates On
Joined: Dec 2010
Posts: 158 Likes: 4 |
Gents, I am starting to think that the Clubsport Conversion is really not such a good idea, with all the cat-wise challenges expressed here...
Is this once a again a classical lack of proper engineering by MMC? "Oh well, it's a Morgan - you have to work on it!"
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Joined: Sep 2009
Posts: 7,435 Likes: 122
Talk Morgan Guru
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Talk Morgan Guru
Joined: Sep 2009
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I also have this 300 cells metallic „Brain“ catalyst from Milano which Peter uses since almost seven years. Brain is a company which belongs to the HJS group and offers high quality. 300 cells keeps you safe to pass the MOT and it also allows better flow than the more popular 400 cells cats. No German MOT failed using this cat in combination with a one-off sports manifold on my 4/4 Sigma.
'14 4/4 graphite grey
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Joined: Dec 2010
Posts: 158 Likes: 4
L - Learner Plates On
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L - Learner Plates On
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Thanks Heinz, copied - but it seems I will not be able to have the Clubsport ECU flash installed unless I accept the "official" Clubsport exhaust setup, including the catalyst that was mentioned before.
And I wonder if there's anybody here who has had this full Clubsport upgrade installed on EU mainland (thinking of E-certificates for the parts...)?
Last edited by Robert MB; 03/07/23 10:54 AM.
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Joined: Dec 2008
Posts: 22,371 Likes: 354
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You need to try a Plus 4 with the AR upgrade Robert. It's a different car, and yes, MMC could have made it a lot less marginal on emissions.
DaveW
'05 Red Roadster S1
'16 Yellow (Not the only) Narrow AR GDI Plus 4
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