F30POST
F30POST
2012-2015 BMW 3-Series and 4-Series Forum
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read
BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N20 and N26 Turbo Engine / Drivetrain / Exhaust Modifications > 328i M peformance exhaust hp gains?
GetBMWParts
Post Reply
 
Thread Tools Search this Thread
      03-14-2013, 12:15 AM   #1
momo3605
Captain
13
Rep
863
Posts

 
Drives: 328i M Sport
Join Date: Aug 2012
Location: Norcal

iTrader: (0)

328i M peformance exhaust hp gains?

Since active autowerke claims 9hp/13tq, does that mean that power can be gained from the M performance exhaust as well?
Appreciate 0
      03-14-2013, 12:17 AM   #2
momo3605
Captain
13
Rep
863
Posts

 
Drives: 328i M Sport
Join Date: Aug 2012
Location: Norcal

iTrader: (0)

Since they are both axlebacks...
Appreciate 0
      03-14-2013, 12:52 AM   #3
pkimM3r
Banned
pkimM3r's Avatar
95
Rep
7,321
Posts

 
Drives: m3 saloon in granny mode.
Join Date: Dec 2009
Location: lost angeles

iTrader: (0)

Quote:
Originally Posted by momo3605
Since they are both axlebacks...
Axle backs are worthless imho. Get something for a decent price which is downpipe back. Do these cars have the cats in the middle of the downpipe as well?
Appreciate 0
      03-14-2013, 01:10 AM   #4
David328M-Sport
Brigadier General
Australia
45
Rep
3,464
Posts

 
Drives: F30 M-Sport 328i Estoril Blue
Join Date: Jun 2005
Location: Melbourne Australia

iTrader: (0)

Quote:
Originally Posted by momo3605 View Post
Since active autowerke claims 9hp/13tq, does that mean that power can be gained from the M performance exhaust as well?
No. Just a leaner, meaner G R O W L.
More meaner than leaner.
Ok, so it's not even leaner.
At all.
__________________
328i M-Sport, Estoril Blue, Carbon XP 35 Tint, front heated seats, black Dakota, Sports Suspension, Anthracite Headliner, HUD, Pro Nav, Sunroof, hk 600w, Bi-Xenon, 19" 403M wheels, Reversing Camera, DAB+, Xenon, BT Ext Connect.
Appreciate 0
      03-14-2013, 03:06 AM   #5
Jamesons Viggen
Brigadier General
United_States
50
Rep
3,573
Posts

 
Drives: '98 M Roadster stg 2+ S/C
Join Date: Jul 2012
Location: Rochester Hills MI

iTrader: (3)

I saw 7whp 20ft lbs with a catback. That was likely mostly muffler. I would say the MP units likely give little hp, within variance in dyno runs, say 2-3whp.
__________________
'98 M Roadster S/C @11-16ps
'06 Saab 9-5 wagon 5mt Aero+ Tuned
Appreciate 0
      03-14-2013, 08:54 PM   #6
zibawal
Major
United_States
11
Rep
1,063
Posts

 
Drives: 2012 X5D
Join Date: Aug 2006
Location: SFO BAY AREA

iTrader: (0)

Quote:
Originally Posted by Jamesons Viggen View Post
I saw 7whp 20ft lbs with a catback. That was likely mostly muffler. I would say the MP units likely give little hp, within variance in dyno runs, say 2-3whp.
Sounds realistic!
Appreciate 0
      03-26-2013, 09:35 PM   #7
JOHN328
Feeling horny
Australia
6
Rep
151
Posts

 
Drives: BMW F30 328
Join Date: Sep 2012
Location: Melbourne VIC

iTrader: (0)

I've just installed my m performance exhaust for my 328i.
Although I don't think there's any said hp gain but I can feel a little more power from it and the turbo sounds a bit louder too. Must be from the better air flow.
So far I'm loving the exhaust, a little bit louder would suit me more, so by time when I get my bms and dp that should sort out all my problems.
Cheers
__________________
BMW F30 328i Sport Line
Appreciate 0
      03-26-2013, 10:17 PM   #8
overkill1125
Captain
overkill1125's Avatar
Canada
16
Rep
670
Posts

 
Drives: 2013 328i xdrive
Join Date: Jan 2010
Location: Montreal, Canada

iTrader: (4)

Is there a resonator on the 328? I see a can near the middle and not sure if that is the resonator or cats?
Appreciate 0
      03-26-2013, 11:50 PM   #9
1GrayBulldog
Private First Class
1
Rep
115
Posts

 
Drives: 2013 135i
Join Date: Jan 2013
Location: Durham, NC

iTrader: (1)

Quote:
Originally Posted by overkill1125
Is there a resonator on the 328? I see a can near the middle and not sure if that is the resonator or cats?
Yes that center can in the exhaust is a resonator.
Appreciate 0
      03-27-2013, 06:34 PM   #10
overkill1125
Captain
overkill1125's Avatar
Canada
16
Rep
670
Posts

 
Drives: 2013 328i xdrive
Join Date: Jan 2010
Location: Montreal, Canada

iTrader: (4)

Quote:
Originally Posted by stormtrooper328i View Post
Yes that center can in the exhaust is a resonator.
So did anyone removed it like most do it on the e90?
Surprised that the BMW Perf Exhaust does not remove it on the F30 but it does on the e90
Appreciate 0
      05-26-2014, 11:06 AM   #11
overkill1125
Captain
overkill1125's Avatar
Canada
16
Rep
670
Posts

 
Drives: 2013 328i xdrive
Join Date: Jan 2010
Location: Montreal, Canada

iTrader: (4)

Quote:
Originally Posted by overkill1125 View Post
So did anyone removed it like most do it on the e90?
Surprised that the BMW Perf Exhaust does not remove it on the F30 but it does on the e90
Update?
Appreciate 0
      05-26-2014, 11:22 AM   #12
rustyminded
Captain
rustyminded's Avatar
9
Rep
873
Posts

 
Drives: bmw 328i
Join Date: Nov 2012
Location: C

iTrader: (0)

Nope AA axle back is catless which I experienced & notice a huge difference in torque, axle back is worthless if it's catted but catless will make a difference.
Appreciate 0
      05-26-2014, 11:42 AM   #13
rustyminded
Captain
rustyminded's Avatar
9
Rep
873
Posts

 
Drives: bmw 328i
Join Date: Nov 2012
Location: C

iTrader: (0)

Quote:
Originally Posted by Jamesons Viggen View Post
I saw 7whp 20ft lbs with a catback. That was likely mostly muffler. I would say the MP units likely give little hp, within variance in dyno runs, say 2-3whp.
what is the brand of this catback
Appreciate 0
      05-26-2014, 03:31 PM   #14
Dabaitu
Colonel
Australia
50
Rep
2,967
Posts

 
Drives: anything given a chance
Join Date: Jul 2008
Location: .au

iTrader: (0)

Garage List
Quote:
Originally Posted by rustyminded View Post
Nope AA axle back is catless which I experienced & notice a huge difference in torque, axle back is worthless if it's catted but catless will make a difference.
First time I've read there's a cc in that section of the exhaust. Last I knew there was one in the mid- and one in the down-pipe. From your other post your AA system is also droning, which I have to say I wouldn't be a fan of.
Appreciate 0
      05-26-2014, 04:10 PM   #15
rustyminded
Captain
rustyminded's Avatar
9
Rep
873
Posts

 
Drives: bmw 328i
Join Date: Nov 2012
Location: C

iTrader: (0)

Quote:
Originally Posted by Dabaitu View Post
First time I've read there's a cc in that section of the exhaust. Last I knew there was one in the mid- and one in the down-pipe. From your other post your AA system is also droning, which I have to say I wouldn't be a fan of.
yes it does drone if you installed CATLESS downpipe too not alone of course and not all the time just certain times in hot weather ONLY but given the sound everyone is going crazy what exhaust is making that sexier sound than a stock 335i, no one believes this is coming from a 4 banger.. aside all that maybe what's causing the drone is a leak
Appreciate 0
      05-26-2014, 05:08 PM   #16
overkill1125
Captain
overkill1125's Avatar
Canada
16
Rep
670
Posts

 
Drives: 2013 328i xdrive
Join Date: Jan 2010
Location: Montreal, Canada

iTrader: (4)

is cat the same as resonator? I was referring to the resonator that is located smack in the middle of the pipes. I know the downpipe is in the front.

Add a catless downpipe and it will definitely change the sound but not planning to do that yet.

Just bought the MPE and wanted a bit more sound from it and therefore was considering in removing the resonator and replace it with a straight pipe.
Would that do anything of will it just make the interior noise worst.
Appreciate 0
      05-26-2014, 07:06 PM   #17
Dabaitu
Colonel
Australia
50
Rep
2,967
Posts

 
Drives: anything given a chance
Join Date: Jul 2008
Location: .au

iTrader: (0)

Garage List
Quote:
Originally Posted by overkill1125 View Post
is cat the same as resonator? I was referring to the resonator that is located smack in the middle of the pipes. I know the downpipe is in the front.

Add a catless downpipe and it will definitely change the sound but not planning to do that yet.

Just bought the MPE and wanted a bit more sound from it and therefore was considering in removing the resonator and replace it with a straight pipe.
Would that do anything of will it just make the interior noise worst.
No, a "cat" is a catalytic converter. A resonator produces the sound a manufacturer wants and is also designed to deliver performance at a certain rpm range. Fiddling with resonators often reduces performance as well as creating pollution issues if you live somewhere that performs pollution testing on cars.
Appreciate 0
      05-27-2014, 09:33 AM   #18
Jamesons Viggen
Brigadier General
United_States
50
Rep
3,573
Posts

 
Drives: '98 M Roadster stg 2+ S/C
Join Date: Jul 2012
Location: Rochester Hills MI

iTrader: (3)

Quote:
Originally Posted by rustyminded View Post
what is the brand of this catback
RE, Rogue Engineering
__________________
'98 M Roadster S/C @11-16ps
'06 Saab 9-5 wagon 5mt Aero+ Tuned
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 01:04 PM.




f30post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST