MR2 Roadster Owners Club

The Workshop => General => Topic started by: Pete McCue on September 10, 2024, 08:59

Title: Twin exhaust options
Post by: Pete McCue on September 10, 2024, 08:59
Good morning all.
Looking for options for a twin pipe exhaust, keeping the cat. I only want it because it looks better, not infterested in power gains and I'd like it to be quiet, I like quiet!
Any recommendations? Thanks.
Title: Re: Twin exhaust options
Post by: Iain on September 10, 2024, 09:55
Unless you get something custom built it you will struggle to find something twin exit and quiet.
Title: Re: Twin exhaust options
Post by: Gaz mr-s on September 10, 2024, 13:06
Quote from: Iain on September 10, 2024, 09:55Unless you get something custom built it you will struggle to find something twin exit and quiet.

+1

I have a German Fox twin-pipe. It's not loud, but it's louder than stock.
Title: Re: Twin exhaust options
Post by: boor on September 10, 2024, 13:08
Cobra is not for you, then - it's quite loud. TTE/Remus is a bit better, but I would still put it in the "loud" box.
Title: Re: Twin exhaust options
Post by: Ardent on September 10, 2024, 14:14
Zero exhausts twin exit.
Title: Re: Twin exhaust options
Post by: Gibla on September 10, 2024, 15:10
I agree with Jason @Ardent

The Zero twin exit is of high quality, v. well made, fits well and imo. a great long-term prospect (if a tad expensive),+looks well on the car.

However, it is louder than OEM. and it does give a performance boost, which the op. stated he wasn't fussed about.
Title: Re: Twin exhaust options
Post by: Pete McCue on September 10, 2024, 16:45
Quote from: Gibla on September 10, 2024, 15:10I agree with Jason @Ardent

The Zero twin exit is of high quality, v. well made, fits well and imo. a great long-term prospect (if a tad expensive),+looks well on the car.

However, it is louder than OEM. and it does give a performance boost, which the op. stated he wasn't fussed about.
Thanks for that. Don't get me wrong, if a wee bit more power comes with it that's all well and good, it's just not a priority. A little bit louder, again, not too much of an issue as long as it's not raucous!
I will look them up.
If anyone has a video of one that would be even more helpful! (If I'm not pushing my luck!  :)) )
Title: Re: Twin exhaust options
Post by: Ardent on September 10, 2024, 21:28
I've tried before without much success. More engine than zorst sound recording on a phone. Will be in here somewhere.
Search a combo of me and zero
 
Title: Re: Twin exhaust options
Post by: Pete McCue on September 25, 2024, 17:15
OK, bit of an update.
I've decided on a Malian twin exit exhaust, (under bumper). Looking at various videos it sounds quite deep and mellow so fingers crossed. It looks well made and very sturdy, especially at it's very reasonable price, but I notice that the mounting plate that attaches to the cat is really thick and there's no captive nuts. I doubt the original bolts with springs will be long enough to penetrate the plate. Also, I'm a bit confused by those spring bolts as, looking at new ones, they seem to have a flange that would sit against the cat mounting plate when bolted up so what are the springs doing?? If the nut is tightening against the flange on the bolt it can't move so why bother? I'm looking to bolt it up with M8 x 50mm stainless bolts and nuts, any problem with that? Cheers.
Title: Re: Twin exhaust options
Post by: Carolyn on September 25, 2024, 17:34
The springs sit on the flanges on the bolts.  The threaded part of the bolt goes through the cat and into the back box.  It's a spring loaded joint.  You have to bring the cat with the donut gasket into close proximity to the flange on the back box in order to get the threads  on the bolt started.  I use large G clamps to accomplish this.  It's a spring loaded joint.  Common on exhaust connections.

Your solution is incorrect and will not give reliable results.
Title: Re: Twin exhaust options
Post by: Ardent on September 25, 2024, 17:39
You may need to check with them or wait till it arrives and see.

On the Malian I had, the oem spring bolts were redundant as was the donut gasket. Yes will need a nut n bolt arrangement and possibly a flat gasket.
Be handy if they mentioned this somewhere in the sales blurb.
Title: Re: Twin exhaust options
Post by: Pete McCue on September 25, 2024, 18:06
Quote from: Carolyn on September 25, 2024, 17:34The springs sit on the flanges on the bolts.  The threaded part of the bolt goes through the cat and into the back box.  It's a spring loaded joint.  You have to bring the cat with the donut gasket into close proximity to the flange on the back box in order to get the threads  on the bolt started.  I use large G clamps to accomplish this.  It's a spring loaded joint.  Common on exhaust connections.

Your solution is incorrect and will not give reliable results.
But that's my point, if the springs sit on that flange, or that flange tightens up against the mount then it can't move. I'm hoping it will all become much clearer when I take it all apart.
Title: Re: Twin exhaust options
Post by: Carolyn on September 25, 2024, 18:38
Quote from: Pete McCue on September 25, 2024, 18:06But that's my point, if the springs sit on that flange, or that flange tightens up against the mount then it can't move. I'm hoping it will all become much clearer when I take it all apart.

When you take it apart you will see.  I've been working these cars for around ten years now, so I (usually) know what I'm on about. 
Title: Re: Twin exhaust options
Post by: Ardent on September 25, 2024, 21:25
I think the thing to remember is Malian do not mimic the oem set up. Hence the thick flange. Theirs is a ridged join between cat n box.

That was at least true on their sport back box set up I had. They may have a different set on their twin set up.

Need to see what turns up in the post. They may have revised their design.

https://www.mr2roc.org/index.php?msg=819651 page 2 onwards. Actually page 4 pics
Title: Re: Twin exhaust options
Post by: Bernie on September 25, 2024, 23:37
Comments from a post about Malian yesterday on the FB Group

IMG_2678.png
Title: Re: Twin exhaust options
Post by: shnazzle on September 26, 2024, 06:29
You can't even begin to compare Zero with Malian.

Malian is the AliExpress exhaust of the two.
Personally, for a full system, I don't even find the Zero that expensive.
Title: Re: Twin exhaust options
Post by: Pete McCue on September 26, 2024, 07:04
Oh dear, well we'll have to see. I certainly won't be altering anything on my car to facilitate it. You might see it on e-bay in a couple of weeks!  :))  :))
Title: Re: Twin exhaust options
Post by: shnazzle on September 26, 2024, 07:52
Quote from: Pete McCue on September 26, 2024, 07:04Oh dear, well we'll have to see. I certainly won't be altering anything on my car to facilitate it. You might see it on e-bay in a couple of weeks!  :))  :))
That's usually the (short) lifecycle of the Malian kit.

I've even seen them for sale here in the Netherlands on Facebook. "Purchased from the UK!"

But all jokes aside, it's "fine". The coveted TTE dual exhaust is an absolute abomination on the inside and that was made by Remus. It just looked and sounded pretty.
Title: Re: Twin exhaust options
Post by: Ardent on September 26, 2024, 08:03
Quote from: shnazzle on September 26, 2024, 06:29You can't even begin to compare Zero with Malian.

Malian is the AliExpress exhaust of the two.
Personally, for a full system, I don't even find the Zero that expensive.
Not sure if Kevin (zero) does it on purpose. He makes no mention of the fitting kit that comes with his. Which then adds a lot in terms of value for money.
For the twin set up I went for.
3 or 4 new rubber hangers, his own right hand support bracket with extra long bolt to account for the thickness of the bracket, donut gasket, crush rings, springs n bolts. The lot. All in the box. Perhaps his own version of a gaming type Easter egg.
Title: Re: Twin exhaust options
Post by: ucb on September 27, 2024, 12:42
I drove an MR2 with centre exit twin Malian back box
It was loud, constantly loud. All the time.
Title: Re: Twin exhaust options
Post by: Pete McCue on September 27, 2024, 13:19
Thanks for all the comments and advice, much appreciated. If it actually stops raining for long enough I'm going to fit it tomorrow. However, one more question. The mounting plate on the exhaust has a generous chamfer/taper on the inside so designed for the donut gasket I guess. I ordered one from RHD Performance when I got the manifold gasket. The thing is, the one they supplied has an internal diameter of 54mm but other places list one with an internal diameter of 45mm which one is correct? I don't really want to have the whole thing dismantled only to find I've got the wrong gasket!
Cheers.
Title: Re: Twin exhaust options
Post by: Joesson on September 27, 2024, 13:36
@Pete McCue

Reference your concern over parts required for fitting your new Malian exhaust, I believe @Ardent trod that path and likely has some advice  , beyond that in post #10 above.
Title: Re: Twin exhaust options
Post by: Pete McCue on September 27, 2024, 13:59
Quote from: Joesson on September 27, 2024, 13:36@Pete McCue

Reference your concern over parts required for fitting your new Malian exhaust, I believe @Ardent trod that path and likely has some advice  , beyond that in post #10 above.

Yes, I see he ended up fitting a flat gasket, but mine looks deeply dished as if to take the tapered wire donut.
Title: Re: Twin exhaust options
Post by: Ardent on September 27, 2024, 21:42
Can you pop a pic up of said deep dished.
I thought the same, right up until the 2 came together.

There is apic of mine in the link above page 4.
Does yours look like that?
Title: Re: Twin exhaust options
Post by: Pete McCue on September 27, 2024, 22:45
Quote from: Ardent on September 27, 2024, 21:42Can you pop a pic up of said deep dished.
I thought the same, right up until the 2 came together.

There is apic of mine in the link above page 4.
Does yours look like that?
No need, it was exactly as yours, no way the donut was going to fit. It just bolts up flange to flange. I thought I'd strip the back end down so it was ready for tomorrow, but it was all so easy that the exhaust is already fitted and sounds really nice idling and revving but haven't driven yet. Looking forward to getting it all back together tomorrow and taking it for a drive.
Title: Re: Twin exhaust options
Post by: Pete McCue on September 28, 2024, 12:26
Update:
Ok, everything back on the car and taken for a 20 mile road test. Sound wise, it's pretty much perfect. Sounds smooth with no stupid popping & banging on the overrun. Inside the car the sound level is barely any different from stock with no booming or droning, so all good?? Err, no, there is one issue and that is the two tail pipes don't sit the same, which I know is going to drive me insane! I'm going to have to strip it back down again and see if I can manipulate the position of the silencer body to bring the tail pipes more even.  :-\
Title: Re: Twin exhaust options
Post by: Call the midlife! on September 28, 2024, 13:23
Quote from: Pete McCue on September 28, 2024, 12:26Update:
Ok, everything back on the car and taken for a 20 mile road test. Sound wise, it's pretty much perfect. Sounds smooth with no stupid popping & banging on the overrun. Inside the car the sound level is barely any different from stock with no booming or droning, so all good?? Err, no, there is one issue and that is the two tail pipes don't sit the same, which I know is going to drive me insane! I'm going to have to strip it back down again and see if I can manipulate the position of the silencer body to bring the tail pipes more even.  :-\
Good luck with that, it's one of the issues with the Malian fitment, the solid flange joint will govern the fit of the back box more than anything else.
You're probably better off trying to bend the tail pipe mounting rods.
Title: Re: Twin exhaust options
Post by: Pete McCue on September 28, 2024, 14:24
Quote from: Call the midlife! on September 28, 2024, 13:23Good luck with that, it's one of the issues with the Malian fitment, the solid flange joint will govern the fit of the back box more than anything else.
You're probably better off trying to bend the tail pipe mounting rods.
Yes, it was a bit of a git, but I've got it quite reasonable now.
(https://i.postimg.cc/gk4j1KWn/20240928-141755.jpg)
Title: Re: Twin exhaust options
Post by: Jay on September 28, 2024, 15:54
I fitted one a while back and found it bang on for the price point.  Only had a knackered old stock system to compare it to though.

Funny you should mention the pipes position - had a few goes at getting mine to sit symmetrically, still not 100% but it's stopped bothering me.

Health to enjoy.
Title: Re: Twin exhaust options
Post by: Pete McCue on September 28, 2024, 16:06
Quote from: Jay on September 28, 2024, 15:54I fitted one a while back and found it bang on for the price point.  Only had a knackered old stock system to compare it to though.

Funny you should mention the pipes position - had a few goes at getting mine to sit symmetrically, still not 100% but it's stopped bothering me.

Health to enjoy.
I agree, for the money I think it's pretty impressive really.
Title: Re: Twin exhaust options
Post by: steveash on September 30, 2024, 08:23
Quote from: Pete McCue on September 28, 2024, 12:26Update:
Ok, everything back on the car and taken for a 20 mile road test. Sound wise, it's pretty much perfect. Sounds smooth with no stupid popping & banging on the overrun. Inside the car the sound level is barely any different from stock with no booming or droning, so all good?? Err, no, there is one issue and that is the two tail pipes don't sit the same, which I know is going to drive me insane! I'm going to have to strip it back down again and see if I can manipulate the position of the silencer body to bring the tail pipes more even.  :-\

Boo! I loved the noise I got from a leaky gasket.
Title: Re: Twin exhaust options
Post by: Pete McCue on September 30, 2024, 08:41
Quote from: steveash on September 30, 2024, 08:23Boo! I loved the noise I got from a leaky gasket.
:))  :))  Yeah, but I'm an old fart!