Equal-length exhaust discussion: new S55 sounds

[Flange]

Milltek are about a 20 min drive away

[ntg44]

Originally Posted by Flange

Milltek are about a 20 min drive away

Actually, this might be the perfect solution for M2C owners. TopGear can get the M3/M4 system out, and Milltek can lead the way for M2C. Both can be released within a few months of each other, and all S55 owners win.

Sooner or later the big names are going to catch on, we may as well try to be ahead of them.

[Montaver]

Originally Posted by ntg44

Actually, this might be the perfect solution for M2C owners. TopGear can get the M3/M4 system out, and Milltek can lead the way for M2C. Both can be released within a few months of each other, and all S55 owners win.

Sooner or later the big names are going to catch on, we may as well try to be ahead of them.

Milltek sport is top of my list, given its cost, sound, and attractive carbon tip design. It's similar to the Remus but $1.5k USD less. The issue with it is their midpipe is designed for OPF cars so it doesn't quite line up correctly for US spec cars, requiring extra work to fit. It also doesn't totally kill the 3 cylinder noise, although nothing out there currently does.

If they designed a mid pipe to equalize the lengths mating to their current muffler design I'd buy it no question. Regardless whatever the solution is for the M2C i'll probably buy it no question though

[Flange]

Well, I’ve just had what seems a positive reply back from Milltek.
Will update here as to what, or if anything happens.

[spool twice]

That is incredible that they see value in this, wow! Between both itll redefine the "S55" sound (a real 6 cyl now) without needing to go custom.

[spool twice]

Originally Posted by MyFragileHalogen

Just for fun I brought out my guitar and compared top musical note of the V2 exhaust and MPE below. top note is still similar- the V2 ends up at about E right below A(440Hz) and the MPE go up to about F#. I guess it's due to tone- different harmonic components that make it higher pitched.


In the meantime (also for fun) top note of GT3 is only slightly higher, about quarter step above G# (almost close to 440Hz A).

I guess it's the 'tone' that matters a lot more.

These are new things I read and learn about so appreciate all the discussions and info.

https://www.caranddriver.com/feature...erent-feature/


p.s. I like MPE that it made big improvement over stock exhaust and there are tonal characteristics I like about; but yeah, having that said, I also have my eyes on the new exhaust development.

I would agree, the tonal change makes the sound more "dramatic" and less peaky in pitch (think of a triangle vs a mound in frequency range or a more natural roll-off), there's just more frequencies present, with none over-powering the other so it sounds less harsh and more mellow, smoother, and balanced character.

I would love to hook up a frequency meter to get objective #'s on the difference in range between both equal-length and none equal-length systems.

Also, would love to hear an MPE with equal-length set-ups as well. Given the nature that the MPE sounds higher in pitch and more "hollow" (so to speak), I feel it would sound pretty good.

[aBMWfan]

Originally Posted by spool twice

I can't wait to hear this! did you get that x-pipe crossover installed now?

Not yet probably soon, hopefully in the next month

[DanMpower]

Originally Posted by ntg44

Actually, this might be the perfect solution for M2C owners. TopGear can get the M3/M4 system out, and Milltek can lead the way for M2C. Both can be released within a few months of each other, and all S55 owners win.

Sooner or later the big names are going to catch on, we may as well try to be ahead of them.

ntg44, please have TopGear include some clean looking tips on the production exhaust, no burnt blue ricer tips mmmkay?

[ntg44]

Originally Posted by RSXiMUS

ntg44, please have TopGear include some clean looking tips on the production exhaust, no burnt blue ricer tips mmmkay?

Even though I'm not the one calling the shots at all, I can say with a high level of confidence blue tips probably won't be an option haha.

[jrp73]

Originally Posted by Flange

Well, I’ve just had what seems a positive reply back from Milltek.
Will update here as to what, or if anything happens.

Keep us updated on this please mate, I've already tried one popular BMW exhaust mod place and they basically laughed at the idea and said it doesn't make any sense...

would be great to have someone like Milltek on this

[ntg44]

Originally Posted by jamespheely

Keep us updated on this please mate, I've already tried one popular BMW exhaust mod place and they basically laughed at the idea and said it doesn't make any sense...

would be great to have someone like Milltek on this

Did they laugh at the concept or the execution? I can see why a performance shop wouldn't do this. No performance benefit. But if they haven't heard the results, may be worth showing them.

[jrp73]

Originally Posted by ntg44

Did they laugh at the concept or the execution? I can see why a performance shop wouldn't do this. No performance benefit. But if they haven't heard the results, may be worth showing them.

the concept, in their words "honestly, that's utter rubbish", "it literally makes no sense". I provided them with links to the videos but obviously didn't care enough to watch them.

Edit: It's worth adding this isn't a performance shops, they modify OEM mufflers and resonators purely for sound improvement.

[ntg44]

Originally Posted by jamespheely

the concept, in their words "honestly, that's utter rubbish", "it literally makes no sense". I provided them with links to the videos but obviously didn't care enough to watch them.

Proof is in the piping

No worries, once TopGear and hopefully Milltek come out with these, companies will start noticing.

[spool twice]

....and the reason the S55 had sounded like the S55 for years. Thank goodness a few of us took charge of this.

[ra2289]

Originally Posted by ntg44

Did they laugh at the concept or the execution? I can see why a performance shop wouldn't do this. No performance benefit. But if they haven't heard the results, may be worth showing them.

There hasn't been a performance loss with any of these custom systems has there? Just curious. Not like other aftermarket systems are known for independently documented gains.

[Flange]

Originally Posted by jamespheely

the concept, in their words "honestly, that's utter rubbish", "it literally makes no sense". I provided them with links to the videos but obviously didn't care enough to watch them.

Edit: It's worth adding this isn't a performance shops, they modify OEM mufflers and resonators purely for sound improvement.

PCW?

[MyFragileHalogen]

Originally Posted by spool twice

I would agree, the tonal change makes the sound more "dramatic" and less peaky in pitch (think of a triangle vs a mound in frequency range or a more natural roll-off), there's just more frequencies present, with none over-powering the other so it sounds less harsh and more mellow, smoother, and balanced character.

I would love to hook up a frequency meter to get objective #'s on the difference in range between both equal-length and none equal-length systems.

Also, would love to hear an MPE with equal-length set-ups as well. Given the nature that the MPE sounds higher in pitch and more "hollow" (so to speak), I feel it would sound pretty good.

In fact I was wrong, the dominant note in human (my) ears for MPE is about one octave lower than the V2 equal length exhaust and the porsche. Definitely looking forward to seeing a quality commercial produects coming out with this improved sound! Yes MPE has distinctive lighter and crisper tone perhaps coming form the material (titanium muffler...and that $5000) which would be nice to be preserved. (edit) First we will see the proven full exhaust (which could be already a big leap forward if all goes well) and then hopefully there will be also proven modification solution for MPE.

[Kilabyte]

Where is RMDZidane? I hope he's OK. I've sent him a PM with no response. I'm wondering if I should wait for a final product from one of the masters here or if I should butcher my MPE, this thread has me literally hating the sound of my car as of late. My brother in law did say it sounds good when I'm next to him but only at WOT at high PRMs. I want straight 6 sounds now!

[ntg44]

Originally Posted by ra2289

There hasn't been a performance loss with any of these custom systems has there? Just curious. Not like other aftermarket systems are known for independently documented gains.

I don't think anyone has put their car on the dyno to find out. I know that the TopGear production system will be dyno tested against my stock exhaust, but I'd wager any gains would be a result of 2nd cat delete. The stock exhaust is about as straight through as it gets.

[jrp73]

Originally Posted by Flange

PCW?

Spot on, I was quite disappointed with his attitude to be honest. I would have thought if anyone was up for experimenting it would have been him :

[ntg44]

Originally Posted by Kilabyte

I'm wondering if I should wait for a final product from one of the masters here or if I should butcher my MPE, this thread has me literally hating the sound of my car as of late. My brother in law did say it sounds good when I'm next to him but only at WOT at high PRMs. I want straight 6 sounds now!

Just curious, what is your reason for wanting to keep your MPE muffler and hack up the mid section? I'm looking at the mid section's pipe routing and it looks like a nightmare compared to stock exhaust due to where the valves are and how there's an extra split to the muffler that the stock one doesn't have.

You could try cutting it right before the pipes split, but that looks like it would be tight as hell to get the extra length on one side, merge, and route back out to the 2 entrances with clamps, since I'm assuming you won't find a titanium fabricator to weld in some kind of x pipe collector. I'm not sure there's room for all that.

[Flange]

Originally Posted by jamespheely

Spot on, I was quite disappointed with his attitude to be honest. I would have thought if anyone was up for experimenting it would have been him :

Perhaps adding pipes isn’t within his remit.
Hacking open mufflers is though, and possibly the thought of these cars sounding better with extra pipes than a butchered back box worries him

I’m just surmising....