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BMW 5-Series (G30) Forum Engine, Exhaust, Drivetrain, Tuning Modifications MPE fitted today

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      04-05-2019, 04:07 PM   #1
Panchoa
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MPE fitted today

Had the MPE fitted today and its not quite what i expected. Its pretty quiet if i am honest. They did say it gets louder but how loud will it get? No pops or crackles yet either....do they come later once run in????
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      04-06-2019, 01:59 AM   #2
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Quote:
Originally Posted by Panchoa View Post
Had the MPE fitted today and its not quite what i expected. Its pretty quiet if i am honest. They did say it gets louder but how loud will it get? No pops or crackles yet either....do they come later once run in????
I have the MPPSK, it is much louder than stock at start up and WOT with great tone and a bit louder driving around.

It does get throatier by time but not much.
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      04-07-2019, 01:16 PM   #3
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Originally Posted by emre View Post
I have the MPPSK, it is much louder than stock at start up and WOT with great tone and a bit louder driving around.

It does get throatier by time but not much.
Is there a difference in sound if you fit the MPE on its on (which is what ihave) vs MPPK??
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      04-08-2019, 12:21 AM   #4
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Originally Posted by Panchoa View Post
Is there a difference in sound if you fit the MPE on its on (which is what ihave) vs MPPK??
There may be due to different tune but that's just a guess , I never heard MPE to compare.

I can only confirm exhaust with MPPSK is noticeably louder at start up and WOT. With pops, burbles too.
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      04-08-2019, 05:47 PM   #5
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I have a suspicion that BMW redesigned the MPE from its first release.
My MPE was purchased in early 2017.
It is louder than what I recently installed to local customer.
I do know that some was complaining about drone when MPE was initially released.
I do experience some drone under certain condition.
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      04-10-2019, 09:34 PM   #6
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Mine pops and had it for 20 months
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      05-07-2019, 02:52 PM   #7
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This is going to sound like a silly question but.....my car is at the dealer at the moment for a m performance carbon rear diffuser with the bumper trim but they are saying it doesnt fit as i have the m perf exhaust with chrome tips......surely they are wrong as the diffuser should fit the m perf exhaust whether you have chrome or carbon tips, right?!?!?!
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      05-09-2019, 07:47 PM   #8
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Quote:
Originally Posted by Panchoa View Post
This is going to sound like a silly question but.....my car is at the dealer at the moment for a m performance carbon rear diffuser with the bumper trim but they are saying it doesnt fit as i have the m perf exhaust with chrome tips......surely they are wrong as the diffuser should fit the m perf exhaust whether you have chrome or carbon tips, right?!?!?!
if you bought complete set...it should be consisting of 3 parts...adapter, middle part which should be for 550i and able to fit your MP exhaust, and the bottom carbon fiber thing ..... are you sure they made a right order for you?
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      05-27-2019, 09:46 AM   #9
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Just posted this in the Photo/Video/Builds section but thought I would repeated it here as there seem to be several threads on this. --Bob

Well after thinking about (and pricing) the MPPSK I decided to just go with the M Performance exhaust. Had it installed last week, about $2,100 total, including labor and all three parts as noted above (muffler, tips and rear valance). My impression so far is that it is definitely louder than stock and under strong throttle in Sport Plus sounds excellent, and manual shifting makes it sound even better. However, contrary to several opinions here, I find it has noticeable resonance (drone) at around 2,200-2,400 rpm under light to moderate throttle load. Especially noticeable when the transmission shifts up and the revs land in that zone at the upshift. I am particularly aware of this as for about 20 years I did a lot of research and testing on resonance in C4 ZR-1 exhaust systems. The ZR-1's LT5 engine had two specific resonance peaks, one at 1,800 and one at 3,400 rpms most noticeable under medium to light load. I have not driven enough yet to see if the B58 BMW engine has two noticeable resonance peak points but will eventually. Fairly common for engines to have two. I find that to minimize it (like with my wife in the car, lest she notice that I actually spent the money on a new exhaust), I can drive in Comfort with a light throttle and keep it under 2,400. Passed the test with her in the car last night. I notice that when idling in Comfort it has slightly softer sound than when idling in Sport, so there must be a valve involved somewhere. Anyway I will continue to enjoy it and see if I can find a solution to this. I suspect not, as taming a resonance peak usually requires something called a Helmholtz Resonator, a chamber ordinarily encased inside a muffler or center resonator. We'll see. I kept the takeoff parts just in case it becomes too much, but otherwise enjoying it so far. --Bob
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      05-27-2019, 06:56 PM   #10
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Quote:
Originally Posted by Warp Ten View Post
I suspect not, as taming a resonance peak usually requires something called a Helmholtz Resonator
I cured this when I installed a flux capacitor
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      05-27-2019, 10:48 PM   #11
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Quote:
Originally Posted by Warp Ten View Post
Just posted this in the Photo/Video/Builds section but thought I would repeated it here as there seem to be several threads on this. --Bob

Well after thinking about (and pricing) the MPPSK I decided to just go with the M Performance exhaust. Had it installed last week, about $2,100 total, including labor and all three parts as noted above (muffler, tips and rear valance). My impression so far is that it is definitely louder than stock and under strong throttle in Sport Plus sounds excellent, and manual shifting makes it sound even better. However, contrary to several opinions here, I find it has noticeable resonance (drone) at around 2,200-2,400 rpm under light to moderate throttle load. Especially noticeable when the transmission shifts up and the revs land in that zone at the upshift. I am particularly aware of this as for about 20 years I did a lot of research and testing on resonance in C4 ZR-1 exhaust systems. The ZR-1's LT5 engine had two specific resonance peaks, one at 1,800 and one at 3,400 rpms most noticeable under medium to light load. I have not driven enough yet to see if the B58 BMW engine has two noticeable resonance peak points but will eventually. Fairly common for engines to have two. I find that to minimize it (like with my wife in the car, lest she notice that I actually spent the money on a new exhaust), I can drive in Comfort with a light throttle and keep it under 2,400. Passed the test with her in the car last night. I notice that when idling in Comfort it has slightly softer sound than when idling in Sport, so there must be a valve involved somewhere. Anyway I will continue to enjoy it and see if I can find a solution to this. I suspect not, as taming a resonance peak usually requires something called a Helmholtz Resonator, a chamber ordinarily encased inside a muffler or center resonator. We'll see. I kept the takeoff parts just in case it becomes too much, but otherwise enjoying it so far. --Bob
how about in comfort mode, is it "same" as stock, that's my get out jail card for not having wife knows about it...
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      05-28-2019, 07:33 AM   #12
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Quote:
Originally Posted by clee1982 View Post
how about in comfort mode, is it "same" as stock, that's my get out jail card for not having wife knows about it...
if you want to sound stock while in comfort mode...buy Remus....Remus has valve same like original and it opens up in sport mode....ideal for commute and if you want it louder, go to sport and it becomes much louder......
things get even better if you remove resonator... if it is still not enough get a downpipe
MPE does not have valve,and seems to be more quiet than Remus
Hope that helps
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      05-29-2019, 09:32 AM   #13
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Quote:
Originally Posted by aadum View Post
if you want to sound stock while in comfort mode...buy Remus....Remus has valve same like original and it opens up in sport mode....ideal for commute and if you want it louder, go to sport and it becomes much louder......
things get even better if you remove resonator... if it is still not enough get a downpipe
MPE does not have valve,and seems to be more quiet than Remus
Hope that helps
Good idea but....too late. Probably done spending on it for now...Bob
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