Review: Stock F80 M3 / M4 exhaust in various modified configurations (/w videos)

rjpeaks · 10-27-2014, 11:10 AM

solid post.

///M Power-Belgium · 10-27-2014, 11:27 AM

I realy have huge respect for OP knowing that experimenting with a new exhaust type is no joke !
Why I know this ? Is because I've done the Oem.exhaust mod on my E92 by myself and sounds just perfect .
For OP I want to say...Congrats man at least an F80 that sounds realy good !
You should keep it this way ,because perfect work was done here...

sherm · 10-27-2014, 11:55 AM

With the Magnaflow, is there any welding involved or anything? Or is it just taking off the catalytic converter and replacing it with the Magnaflow?

FSHNGRY · 10-27-2014, 12:06 PM

Very interesting. Excellent write up. I was curious about all of these various avenues as far as modding the exhaust for now before changing for the Eisenmann. Thanks for the info

Jaguar · 10-27-2014, 12:30 PM

Incredible write up. Can you confirm the following:

-Your exhaust valve is disabled and left in the wide open position?

Its interesting that you found out the secondary cats are the cause of the poor sound and drone.

I currently have the exhaust valve in the wide open position and like you said, have drone in the low RPM's, but overall I do like it since you can "feel" where your engine speed is at now.

Again, thanks for the great post

Powaup · 10-27-2014, 12:43 PM

Interesting, much less expensive than down pipes is that what made you go with center pipes instead of down pipes?

parky1215 · 10-27-2014, 12:49 PM

Quote:

Originally Posted by ///M Power-Belgium

I realy have huge respect for OP knowing that experimenting with a new exhaust type is no joke !
Why I know this ? Is because I've done the Oem.exhaust mod on my E92 by myself and sounds just perfect .
For OP I want to say...Congrats man at least an F80 that sounds realy good !
You should keep it this way ,because perfect work was done here...

Yup, I am very happy with current setup. It's perfect for daily car.

Quote:

Originally Posted by sherm

With the Magnaflow, is there any welding involved or anything? Or is it just taking off the catalytic converter and replacing it with the Magnaflow?

Welding is required since you have to cut secondary cats.
It's recommended to take to reputable shop to get welding done. Some shop will weld this without taking exhaust system off.
While do-able, it won't produce clean weld.

Quote:

Originally Posted by Jaguar

Incredible write up. Can you confirm the following:

-Your exhaust valve is disabled and left in the wide open position?

Its interesting that you found out the secondary cats are the cause of the poor sound and drone.

I currently have the exhaust valve in the wide open position and like you said, have drone in the low RPM's, but overall I do like it since you can "feel" where your engine speed is at now.

Again, thanks for the great post

That is correct. My valve is always wide open no matter what speed/mode.
Secondary cats help to reduce drone but it doesn't do as welll as magnaflow muffler. Once you install magnaflow, it will eliminate most of the drone you hear now.

parky1215 · 10-27-2014, 12:54 PM

Quote:

Originally Posted by Powaup

Interesting, much less expensive than down pipes is that what made you go with center pipes instead of down pipes?

I actually decide to not to install any dp on this car because I simply cannot stand catless gas smell.
Also, I heard that main cats on dp has fairly good flowing metallic cats on it.
If that's the case, it would be pointless to get aftermarket dp with highflow cats.

///M Power-Belgium · 10-27-2014, 01:09 PM

Quote:

Originally Posted by Definitive

I'm surprised for fun you didn't do one with just straight muffler delete. I really want to know if it's just horrible sounding or similar to stock but louder.

About straight muffler delete and how it sounds ?
Need to say it sounds realy good too ,but don't know if it would drone, here on this page pics and video =>

http://f80.bimmerpost.com/forums/sho...8#post16837188

btbossman · 10-27-2014, 01:25 PM

IMO, sounds terrible. Sounds like a 328 on steroids. Sorry Op, but I think you gotta pay to play on making this car sound good. AKRA, seems the only way so far.

btbossman · 10-27-2014, 01:28 PM

Quote:

Originally Posted by ///M Power-Belgium

About straight muffler delete and how it sounds ?
Need to say it sounds realy good too ,but don't know if it would drone, here on this page pics and video =>

http://f80.bimmerpost.com/forums/sho...8#post16837188

Oh yeah, that does sound proper. forgot about this too. Looks like a great option for those who wont mind some drone.

Jadar · 10-27-2014, 01:29 PM

Thank you for sharing and taking the time and initiative to make this combo

Its Members like this that makes being part of the bimmerpost community such a joy

This is definetely somethinng id be interested in Next year when i get my M3. I love this mod. Huge fan of saving money and making my own exhaust like on my F30

.

Was there a baseline dyno done 1st? Just curious if there was any power change?

Congrats and sounds like you figured out exactly what you want and what works for you.

chmura · 10-27-2014, 02:29 PM

So when you unplug the valves, do you put it in sport + setting and than unplug it??

I'm still waiting for someone to open up the exhaust canister and replace the proliferated piping in there with non proliferated pipes. This should give you an aggressive sound even in comfort mode as well.

m3less · 10-27-2014, 02:36 PM

I really feel like this S55 sounds the same no matter the exhaust option. It's unique to me...not bad, not good..

NorCal f80 · 10-27-2014, 02:39 PM

Quote:

Originally Posted by btbossman

IMO, sounds terrible. Sounds like a 328 on steroids. Sorry Op, but I think you gotta pay to play on making this car sound good. AKRA, seems the only way so far.

Akra is horrible especially for the price.

NorCal f80 · 10-27-2014, 02:40 PM

Quote:

Originally Posted by parky1215

I actually decide to not to install any dp on this car because I simply cannot stand catless gas smell.
Also, I heard that main cats on dp has fairly good flowing metallic cats on it.
If that's the case, it would be pointless to get aftermarket dp with highflow cats.

Wonder if catless DP will leave black bumper soot as well.

Mikecom32 · 10-27-2014, 03:13 PM

Sorry, but to me it sounds like this at low RPMs (fast forward to 0:34):

Also, the 1-2 shift sounds significantly slower than I expected, even at seemingly full throttle. Is the car in comfort mode or something perhaps? I expected the DCT to shift a lot faster.

Either way, thanks for trying out all these different setups and posting video!

NorCal f80 · 10-27-2014, 03:22 PM

Quote:

Originally Posted by Mikecom32

Sorry, but to me it sounds like this at low RPMs (fast forward to 0:34):

Also, the 1-2 shift sounds significantly slower than I expected, even at seemingly full throttle. Is the car in comfort mode or something perhaps? I expected the DCT to shift a lot faster.

Either way, thanks for trying out all these different setups and posting video!

Sounds a lot better than a stock M3/M4.

jc1654M4 · 10-27-2014, 03:41 PM

Quote:

Originally Posted by dwin_sd

Quote:

Originally Posted by btbossman

IMO, sounds terrible. Sounds like a 328 on steroids. Sorry Op, but I think you gotta pay to play on making this car sound good. AKRA, seems the only way so far.

Akra is horrible especially for the price.

+1 akra sounds like shit especially
For that ridiculous price tag. Best way
To
Go is mpe for 3800 on getbmwparts.
Note: haven't heard akra in person only
Videos but the same goes for mpe and it
Sounds fantastic

btbossman · 10-27-2014, 05:25 PM

Quote:

Originally Posted by dwin_sd

Akra is horrible especially for the price.

Yeah its horrible in the same way a Ferrari 458 sounds horrible. Its hands down the best sound for this car so far, until We see more of that straight pipe setup. But like I said you gotta pay to play...

My 335's cat-back was 2500

My M6's turbo back was 6000

I dont find it unreasonable that the m3/4's is right in the middle, thats the game.

CSanto · 10-27-2014, 05:56 PM

I'm so glad i changed my order to black. I did black wheels as well. Looks Sinister!

parky1215 · 10-27-2014, 07:09 PM

Quote:

Originally Posted by Mikecom32

Sorry, but to me it sounds like this at low RPMs (fast forward to 0:34):

Also, the 1-2 shift sounds significantly slower than I expected, even at seemingly full throttle. Is the car in comfort mode or something perhaps? I expected the DCT to shift a lot faster.

Either way, thanks for trying out all these different setups and posting video!

DCT shifts amazingly fast in mode 3.
But shift speed also varies depending on throttle application, rev range, and etc.
For this video, I ran the car in mdm mode with dct shift mode at 3.
Acceleration starting at 3:00 mark is done at full throttle application shifting around 7k rpm. Previous accelerations were not done @ full throttle.

10-27-2014, 11:10 AM	#23
rjpeaks Lieutenant 14 Rep 577 Posts Drives: F30 335i M-Sport 6pd Join Date: May 2014 Location: Huntington Beach iTrader: (0)	solid post. __________________ 335I M-Sport 6spd EBII MPPK MPE DHP HK PDC ZTP ZPS ZPP ZDA ZPK 802.11ac ABC123
	Appreciate 0 Quote

10-27-2014, 11:27 AM	#24
///M Power-Belgium General 63316 Rep 24,656 Posts Drives: ///M3-E92-DCT Silverstone II Join Date: Jul 2012 Location: Belgium iTrader: (0)	I realy have huge respect for OP knowing that experimenting with a new exhaust type is no joke ! Why I know this ? Is because I've done the Oem.exhaust mod on my E92 by myself and sounds just perfect . For OP I want to say...Congrats man at least an F80 that sounds realy good ! You should keep it this way ,because perfect work was done here... __________________ "MAX VERSTAPPEN" IS THE 2021+2022+2023 F1 WORLD CHAMPION - #UnLeashTheLion BPM DEV-Tune & DCT Software-Tune & Servotronic & coding ///Alpine HID Angeleyes ///Oem.exhaust mod.
	Appreciate 0 Quote

10-27-2014, 11:55 AM	#25
sherm First Lieutenant 28 Rep 326 Posts Drives: '15 BMW M4 Join Date: May 2014 Location: Las Vegas iTrader: (0)	With the Magnaflow, is there any welding involved or anything? Or is it just taking off the catalytic converter and replacing it with the Magnaflow? __________________ ///M4 \| Alpine White \| Sakhir Orange Leather \| Carbon Fiber Trim & Roof \| DCT \| Black 19" Wheels \| Executive Package \| Driver Assistance Plus Package \| Adaptive M Suspension \| Enhanced USB \| Parking Assist \| Harman Kardon
	Appreciate 0 Quote

10-27-2014, 12:06 PM	#26
FSHNGRY Colonel 2337 Rep 2,029 Posts Drives: INDIVIDUAL F90 M5C LCI Join Date: Jun 2009 Location: Fort Lauderdale iTrader: (1) Garage List 2021 BMW F90 M5 LCI [0.00]	Very interesting. Excellent write up. I was curious about all of these various avenues as far as modding the exhaust for now before changing for the Eisenmann. Thanks for the info __________________ CURRENT: '21 M5\| FSHNGRY \| TARTUFO \| CCB \| MPE \| KW \| IND \| EVENTURI \| EISENMANN \| DINAN \| LOADED \| GONE: '15 F82 M4 \| YMB \| IND \| MPERF \| KW \| BM3 \| LOADED GONE: '11 E92 335IS \| BLKSPHR \| OYSTER \| LOADED GONE: '05 E46 ZHP \| LOADED \| DINAN STG3 PKG \| IG: @FSHNGRY
	Appreciate 0 Quote

10-27-2014, 12:30 PM	#27
Jaguar Mark 42 1051 Rep 716 Posts Drives: M Join Date: May 2013 Location: X iTrader: (0)	Incredible write up. Can you confirm the following: -Your exhaust valve is disabled and left in the wide open position? Its interesting that you found out the secondary cats are the cause of the poor sound and drone. I currently have the exhaust valve in the wide open position and like you said, have drone in the low RPM's, but overall I do like it since you can "feel" where your engine speed is at now. Again, thanks for the great post
	Appreciate 0 Quote

10-27-2014, 12:43 PM	#28
Powaup Brigadier General 1253 Rep 3,688 Posts Drives: 2021 Supra 3.0 (Past: 2015 M23 Join Date: Aug 2012 Location: San Francisco, CA iTrader: (0) Garage List 2015 BMW M4 [10.00]	Interesting, much less expensive than down pipes is that what made you go with center pipes instead of down pipes? __________________ Check out my YouTube Channel Powaup Instagram: @ Powaup
	Appreciate 0 Quote

10-27-2014, 01:25 PM	#32
btbossman Banned 104 Rep 1,715 Posts Drives: 2013 335xi M sport--2014 M6 Join Date: Jul 2013 Location: Charlotte, NC iTrader: (0)	IMO, sounds terrible. Sounds like a 328 on steroids. Sorry Op, but I think you gotta pay to play on making this car sound good. AKRA, seems the only way so far.
	Appreciate 0 Quote

10-27-2014, 01:29 PM	#34
Jadar Dejan 1753 Rep 4,197 Posts Drives: 2018 Audi S3 Join Date: Dec 2010 Location: Michigan Ave. iTrader: (6) Garage List 2013 BMW 335i [10.00] 2015 BMW 228i M Spo ... [0.00] 2013 Ford Focus (DD) [0.00] 2001 Alfa Romeo 156 [0.00]	Thank you for sharing and taking the time and initiative to make this combo Its Members like this that makes being part of the bimmerpost community such a joy This is definetely somethinng id be interested in Next year when i get my M3. I love this mod. Huge fan of saving money and making my own exhaust like on my F30 . Was there a baseline dyno done 1st? Just curious if there was any power change? Congrats and sounds like you figured out exactly what you want and what works for you. __________________ FBO-PS1 and stuff Last edited by Jadar; 10-27-2014 at 01:36 PM..
	Appreciate 0 Quote

10-27-2014, 02:29 PM	#35
chmura Colonel 1558 Rep 2,505 Posts Drives: 2019 M2 Competition Join Date: Aug 2009 Location: Orange County, California iTrader: (1)	So when you unplug the valves, do you put it in sport + setting and than unplug it?? I'm still waiting for someone to open up the exhaust canister and replace the proliferated piping in there with non proliferated pipes. This should give you an aggressive sound even in comfort mode as well. __________________ 2019 M2 Competition- October 2, 2018 ED 2011 BMW M3 Sedan Alpine White Picked up via ED 9/27/2011 & Redelivered 11/23/2011 SOLD
	Appreciate 0 Quote

10-27-2014, 02:36 PM	#36
m3less Captain 130 Rep 809 Posts Drives: 15 AY M4 Join Date: Dec 2012 Location: Cali iTrader: (2)	I really feel like this S55 sounds the same no matter the exhaust option. It's unique to me...not bad, not good..
	Appreciate 0 Quote

10-27-2014, 03:13 PM	#39
Mikecom32 Second Lieutenant 150 Rep 280 Posts Drives: '18 M4 ZCP 6MT, '05 330xi 6MT, Join Date: Jul 2013 Location: Pittsburgh, PA iTrader: (0)	Sorry, but to me it sounds like this at low RPMs (fast forward to 0:34): Also, the 1-2 shift sounds significantly slower than I expected, even at seemingly full throttle. Is the car in comfort mode or something perhaps? I expected the DCT to shift a lot faster. Either way, thanks for trying out all these different setups and posting video!
	Appreciate 0 Quote

10-27-2014, 05:56 PM	#43
CSanto Brigadier General 636 Rep 3,039 Posts Drives: 2015 BSM/SO M3 Join Date: Feb 2009 Location: New York iTrader: (3)	I'm so glad i changed my order to black. I did black wheels as well. Looks Sinister!
	Appreciate 0 Quote