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Aug 24th, 2023
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Joined: Feb 2013
Posts: 52
Just Getting Started
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Just Getting Started
Joined: Feb 2013
Posts: 52 |
No welding! This is a very easy job. The exhaust comes off in 20 mins or so, and I'd remove the whole thing as there is some hammering involved to chisel the cat material out of their chambers. You could remove the headers and leave the rear pipes on, but I ran into a little difficulty separating the two pipe sections at the joint rear of the cats as there is some type of sealant in there that acts like a glue. So I'd pull the whole system off the car to spare it from bumps and scratches. Once separated, it's smooth sailing.
It's not really a sealant per se, it is anti-seize. It keeps metal pieces (in this case the front and rear pipes) from corroding together, so that you can get them apart again if you ever need to. I just wrapped my headers and removed the cats and baffles and will post a new thread about it soon. I'm not completely done with the project yet.
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Joined: Oct 2011
Posts: 3,513 Likes: 8
Talk Morgan Addict
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Talk Morgan Addict
Joined: Oct 2011
Posts: 3,513 Likes: 8 |
Great that you are trying it, but I suspect it will be a lot of work for nothing. When I had my old 260bhp Caterham, I removed the rather large Cat, and replaced it with a section of straight through pipe, and have to say, that apart from looking much better, there was no discernable change in exhasut note or noise, nor did I notice any HP gain in day to day driving.
I probably won't bother, I quite like the volume and quality of the exhaust noise just as it is. That's at least one thing I'm happy with!
Paul
[At last, I have a car I can polish]
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Joined: Feb 2013
Posts: 52
Just Getting Started
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Just Getting Started
Joined: Feb 2013
Posts: 52 |
Great that you are trying it, but I suspect it will be a lot of work for nothing. When I had my old 260bhp Caterham, I removed the rather large Cat, and replaced it with a section of straight through pipe, and have to say, that apart from looking much better, there was no discernable change in exhasut note or noise, nor did I notice any HP gain in day to day driving.
I probably won't bother, I quite like the volume and quality of the exhaust noise just as it is. That's at least one thing I'm happy with! I was attempting to become more active on this forum, but this reply totally sapped me of my enthusiasm to participate and share. Not only was I shot down, it was done with a quote that was already used to shoot someone else down. That made me feel pretty bad. My husband keeps encouraging me to share my recent mods. I am a woman M3W owner... I am probably about the most enthusiastic owner out there, and though I have never worked on cars before, I work on my M3W myself. I am quite proud of that fact, and I've decided I'm not going to let someone guessing my work is for nothing keep me from sharing with those who might be interested That said, my mods to my exhaust greatly improved the sound and performance of my M3W. The mod was totally worth it. Here's my addition to this thread. I will start a new thread covering the entire exhaust mod and header wraps. Using a long screwdriver and hammer I removed the cats. It was a little scary at first and took almost an hour.  Top side of the cat was pretty beat up by the time I got it out. Needle nose pliers came in handy as well. Keep a garbage bag nearby because there will be a lot of little pieces of metal created.  Bottom side of the cat just so you can see what it looks like. 
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Joined: Jun 2013
Posts: 1,299
Has a lot to Say!
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Has a lot to Say!
Joined: Jun 2013
Posts: 1,299 |
Not shot down, Mol. Took a round or two in the tail. Keep on thinking free ... Tally Ho !  
 2013 M3W # 793 'Mosquito'
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Joined: Aug 2013
Posts: 1,562
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Aug 2013
Posts: 1,562 |
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Joined: Oct 2011
Posts: 3,513 Likes: 8
Talk Morgan Addict
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Talk Morgan Addict
Joined: Oct 2011
Posts: 3,513 Likes: 8 |
Oh hell Mol, please don't think I was in any way denigrating what you have been doing, that was not the intention of my posting, rather just to give my experience, admittedly with a different car.
I love reading your posts and what you have been doing, and would like to hear more, like the rest of us, when you are ready to tell us. It is so unusual, in this mans world, to find a woman who genuinely loves the Three Wheeler.
Paul
[At last, I have a car I can polish]
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Joined: May 2013
Posts: 108
L - Learner Plates On
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L - Learner Plates On
Joined: May 2013
Posts: 108 |
Mol love your videos on youtube. wish you would do more. my morgan came out of production last week. hope to get her soon.but i have been curious about removing the catalytic converter and baffes myself. can you tell a increase in hp, or just torque. or both. and how much more louder is it. I find the factory spec is plenty loud.
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Joined: Feb 2013
Posts: 52
Just Getting Started
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Just Getting Started
Joined: Feb 2013
Posts: 52 |
If you want, I will make more videos. All I need to know is people like them, then it is worth the effort on my part. I own my own business and my work load is large; it's hard to find time for extra stuff like this, but I enjoy doing it when I can fit it in. We're heading out for a big trip in 3 days and I am taking my GoPro :-)
Last edited by Mol; 23/04/15 02:44 AM.
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Joined: Aug 2014
Posts: 429
Learner Plates Off!
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Learner Plates Off!
Joined: Aug 2014
Posts: 429 |
Mol the Anglophine
Dont do it for others, do it for you, do it because it's fun.
Look forward to the next update. Safe trip.
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Joined: Mar 2013
Posts: 1,015 Likes: 1
Has a lot to Say!
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Has a lot to Say!
Joined: Mar 2013
Posts: 1,015 Likes: 1 |
Mol - I did the same as you and noticed the same improvements as you too. I do believe that the tiny CATs in the headers are a restriction to flow and were what looks like an afterthought, despite always being a mandatory part of the design.
Caterham Se7ens have very good performance CATs on them - but just look at the size of the things! In fact any performance CAT is huge if it is going to work efficiently - which is exactly what the M3W CATs aren't. So top work and if you don't need them for annual technical inspections, then so much the better!
An M3W with high-flow CATs however would look very different, which is what drove the current design of course.
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