BMW M3 Forum (E90 E92)

BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   M3Post - BMW M3 Forum > E90/E92 M3 Technical Topics > Engine, Transmission, Exhaust, Drivetrain, ECU Software Modifications
 
Post Reply
 
Thread Tools Search this Thread
      04-19-2011, 11:21 AM   #1
saeedg48
Brigadier General
United_States
224
Rep
3,567
Posts

Drives: Porsche 991.1 GT3
Join Date: Nov 2008
Location: Newport Beach, CA

iTrader: (1)

Question XPipe Questions - HP & TQ Gains?

1. How much horsepower and torque do XPipes really give?

2. Is a tune necessary to deem more power?

3. Is secondary cat delete enough or is primary cat delete necessary as well?

primary cats -> fabspeed xpipe -> megan racing mufflers + tune.
__________________

2008 M3 Sedan + catless + Tune
2012 CLS63 AMG
2014 M6 Coupe + catless + KW V3

2015 Porsche GT3

Last edited by saeedg48; 04-19-2011 at 12:25 PM.
Appreciate 0
      04-19-2011, 11:24 AM   #2
constantin
Lieutenant
constantin's Avatar
Madagascar
20
Rep
450
Posts

Drives: 4wheels
Join Date: Nov 2009
Location: at home

iTrader: (4)

More sound than power. Hardly noticeable.
Appreciate 0
      04-19-2011, 11:27 AM   #3
Sean05
Putcha ang ganda...
Sean05's Avatar
Philippines
137
Rep
5,394
Posts

Drives: 08 MR E92 M3
Join Date: Feb 2010
Location: Los Angeles, Brea CA.

iTrader: (9)

Send a message via Yahoo to Sean05
15-20HP on xpipe only add another 3-5 on a axle back

deleting secondary will give you a little more maybe another 3-5 but most people use 100-200 cel secondary cat to avoid the nasty smell.

but if you want a full HP and TQ remove the primary and secondary cat and make sure to keep a resonator to avoid rasp on the exhaust.

oh i heard tuning it will give you a total of 30-35 i dont know... just reading from people's results.
__________________
Appreciate 0
      04-19-2011, 12:00 PM   #4
duk
///M
United_States
84
Rep
3,117
Posts

Drives: 2011 AW/FR 6MT E92
Join Date: Jun 2007
Location: San Jose, CA

iTrader: (0)

Quote:
Originally Posted by constantin View Post
More sound than power. Hardly noticeable.
gains r noticeable
__________________
2011 AW/FR 6MT E92 | Powered by Premier | Alekshop | ESS |
Rok n Peace Clothing: www.roknpeace.com

Appreciate 0
      04-19-2011, 12:06 PM   #5
Dave07997S
Brigadier General
184
Rep
3,188
Posts

Drives: 2013 BMW M3 ZCP Coupe
Join Date: May 2009
Location: El Segundo, CA

iTrader: (1)

I am just running 200cpi metallic cats in a riss racing pipe and the results were not just sound. There was a major bump in power even without the tune.

Dave
__________________
2013 M3 Coupe-MR/BLK ZCP, ACM test pipes, BPM Stg2 dev. tune and Megan catback, AFE Stg2. with C/F elbow VMRV810 19x10&19X11 275/295 Mich PSS.
Previous rides: 2011 M3 Coupe-MR/Blk
2007 Porsche 997C2S Speed Yellow/Blk sport seats
2004 BMW M3 Imola/Blk
Appreciate 0
      04-19-2011, 04:12 PM   #6
donovan
Brigadier General
donovan's Avatar
No_Country
157
Rep
4,019
Posts

Drives: e46 m3 modded
Join Date: Aug 2008
Location: here and there

iTrader: (14)

Gains noticeable, but without a tune your top end will be non existant!


I have zero cats and twin resonators
__________________


BMW E46 M3 Black Too many mods
m3e46freak@yahoo.comfor all euro parts!!
ebay/craigslist verified/ m3post/e46fanantics/m3forum/zpost/bimmerforum
Appreciate 0
      04-19-2011, 05:10 PM   #7
wwjd15
Banned
United_States
38
Rep
1,321
Posts

Drives: 11 E92 M3 MR
Join Date: May 2009
Location: Orange County

iTrader: (6)

In general speaking:
bigger pipping + better flow = more power.
No cats = big power gain = loud
Smaller piping + better flow = more low end torque = better response
It depends what's the most important to you.
Appreciate 0
      04-19-2011, 05:59 PM   #8
rockd
rockd's Avatar
United_States
23
Rep
543
Posts

Drives: '11 Z4 35i M-Sport 6MT
Join Date: Apr 2009
Location: San Francisco

iTrader: (11)

Quote:
Originally Posted by SehrSchnell View Post
I have to disagree there... the power gain is quite substantial, and yes, you'll notice that - big time. The sound is a nice addition.
Agreed - gains are very noticeable. And it really opens up the M3 soundtrack!
Appreciate 0
      04-19-2011, 06:18 PM   #9
Singletrack
4th down; 4th quarter? Renegade.
Singletrack's Avatar
United_States
56
Rep
3,825
Posts

Drives: 09 SSII E92 M3; 12 AW X5d
Join Date: Aug 2008
Location: Pittsburgh, PA

iTrader: (3)

Quote:
Originally Posted by donovan View Post
Gains noticeable, but without a tune your top end will be non existant!


I have zero cats and twin resonators
The dynos I've seen show a power loss around 2500 rpm without tuning and gains everywhere else.
Appreciate 0
      04-19-2011, 06:22 PM   #10
Singletrack
4th down; 4th quarter? Renegade.
Singletrack's Avatar
United_States
56
Rep
3,825
Posts

Drives: 09 SSII E92 M3; 12 AW X5d
Join Date: Aug 2008
Location: Pittsburgh, PA

iTrader: (3)

Quote:
Originally Posted by saeedg48 View Post
1. How much horsepower and torque do XPipes really give?

2. Is a tune necessary to deem more power?

3. Is secondary cat delete enough or is primary cat delete necessary as well?

primary cats -> fabspeed xpipe -> megan racing mufflers + tune.
1 Various threads and dynos on this.

2 Tune will give more. IMHO not a must unless you are going catless.

3 2nd cat delete will give modest gains. Doubt you will feel the difference.
Appreciate 0
      04-19-2011, 06:33 PM   #11
kitw
Brigadier General
kitw's Avatar
254
Rep
3,001
Posts

Drives: 2013 E93 M3, Jerez Black
Join Date: Jun 2007
Location: Bay Area, CA

iTrader: (20)

Quote:
Originally Posted by wwjd15 View Post
In general speaking:
bigger pipping + better flow = more power.
No cats = big power gain = loud
Smaller piping + better flow = more low end torque = better response
It depends what's the most important to you.
heh, my Akrapovic made power everywhere about 2500 rpm, and the piping is about the same as stock it's just better designed.
Appreciate 0
      04-19-2011, 07:13 PM   #12
rockd
rockd's Avatar
United_States
23
Rep
543
Posts

Drives: '11 Z4 35i M-Sport 6MT
Join Date: Apr 2009
Location: San Francisco

iTrader: (11)

Quote:
Originally Posted by Singletrack View Post
1 Various threads and dynos on this.

2 Tune will give more. IMHO not a must unless you are going catless.

3 2nd cat delete will give modest gains. Doubt you will feel the difference.
That's not *entirely* true - a secondary cat delete provides a very noticeable power bump.
Appreciate 0
      04-19-2011, 07:31 PM   #13
wwjd15
Banned
United_States
38
Rep
1,321
Posts

Drives: 11 E92 M3 MR
Join Date: May 2009
Location: Orange County

iTrader: (6)

Quote:
Originally Posted by kitw View Post
heh, my Akrapovic made power everywhere about 2500 rpm, and the piping is about the same as stock it's just better designed.
HF cats and better flow explains that.
Appreciate 0
      04-19-2011, 07:36 PM   #14
Brosef
Brigadier General
Brosef's Avatar
United_States
619
Rep
3,399
Posts

Drives: GT4
Join Date: Aug 2009
Location: Chicago

iTrader: (4)

I can only speak for the change from adding an X-pipe and a tune at the same time (Challenge X-pipe with HFC's and ESS tune). the gains were certainly noticeable. there is a significant change in sound and a noticeable increase in power. I felt an increase in torque down low for one thing. However, a more objective measure I also noticed was how much wheelspin I would get during gear changes on the DCT and the amount of wheelspin throughout first gear.
Appreciate 0
      04-19-2011, 07:39 PM   #15
saeedg48
Brigadier General
United_States
224
Rep
3,567
Posts

Drives: Porsche 991.1 GT3
Join Date: Nov 2008
Location: Newport Beach, CA

iTrader: (1)

Quote:
Originally Posted by Brosef View Post
I can only speak for the change from adding an X-pipe and a tune at the same time (Challenge X-pipe with HFC's and ESS tune). the gains were certainly noticeable. there is a significant change in sound and a noticeable increase in power. I felt an increase in torque down low for one thing. However, a more objective measure I also noticed was how much wheelspin I would get during gear changes on the DCT and the amount of wheelspin throughout first gear.
that's torque you're feeling - xpipes are going to add torque it's the simple rules of physics
__________________

2008 M3 Sedan + catless + Tune
2012 CLS63 AMG
2014 M6 Coupe + catless + KW V3

2015 Porsche GT3
Appreciate 0
      04-19-2011, 10:01 PM   #16
CrazyJoe
Banned
CrazyJoe's Avatar
1
Rep
108
Posts

Drives: E92
Join Date: Apr 2011
Location: Jersey/NY

iTrader: (0)

Quote:
Originally Posted by rockd View Post
That's not *entirely* true - a secondary cat delete provides a very noticeable power bump.

True
Appreciate 0
      04-19-2011, 10:27 PM   #17
Dave07997S
Brigadier General
184
Rep
3,188
Posts

Drives: 2013 BMW M3 ZCP Coupe
Join Date: May 2009
Location: El Segundo, CA

iTrader: (1)

Quote:
Originally Posted by donovan View Post
Gains noticeable, but without a tune your top end will be non existant!


I have zero cats and twin resonators
Huh?

Sorry man disagree, my cars rips to 8400rpm like a scalded dog.

Dave
__________________
2013 M3 Coupe-MR/BLK ZCP, ACM test pipes, BPM Stg2 dev. tune and Megan catback, AFE Stg2. with C/F elbow VMRV810 19x10&19X11 275/295 Mich PSS.
Previous rides: 2011 M3 Coupe-MR/Blk
2007 Porsche 997C2S Speed Yellow/Blk sport seats
2004 BMW M3 Imola/Blk
Appreciate 0
      04-20-2011, 02:00 AM   #18
Singletrack
4th down; 4th quarter? Renegade.
Singletrack's Avatar
United_States
56
Rep
3,825
Posts

Drives: 09 SSII E92 M3; 12 AW X5d
Join Date: Aug 2008
Location: Pittsburgh, PA

iTrader: (3)

Quote:
Originally Posted by rockd View Post
That's not *entirely* true - a secondary cat delete provides a very noticeable power bump.
Depends on sensitivity of butt dyno
Appreciate 0
      04-20-2011, 09:41 AM   #19
M3_FTW
Private First Class
6
Rep
116
Posts

Drives: 2010 E92 M3 Edition Model
Join Date: Dec 2010
Location: South Africa

iTrader: (0)

My car with a tune and Xpipe with OEM backbox gained peak HP of about 24HP, but the gains were practically across the entire RPM range. Torque increased BIG time, especially at the bottom end.
I will post a dyno graph later.
Appreciate 0
      04-20-2011, 09:51 AM   #20
rockd
rockd's Avatar
United_States
23
Rep
543
Posts

Drives: '11 Z4 35i M-Sport 6MT
Join Date: Apr 2009
Location: San Francisco

iTrader: (11)

Quote:
Originally Posted by Singletrack View Post
Depends on sensitivity of butt dyno
You bring up a good point - butt dyno is not 100% reliable. That's why Sosi Performance is offering a free before/after dyno session to anyone who purchases the Sosi X-Pipe before the end of the month (see sig)
Appreciate 0
      04-20-2011, 11:26 AM   #21
Singletrack
4th down; 4th quarter? Renegade.
Singletrack's Avatar
United_States
56
Rep
3,825
Posts

Drives: 09 SSII E92 M3; 12 AW X5d
Join Date: Aug 2008
Location: Pittsburgh, PA

iTrader: (3)

That's a great deal.
Appreciate 0
      04-20-2011, 11:45 AM   #22
Ferre86
Captain
Ferre86's Avatar
Turkey
19
Rep
946
Posts

Drives: E93 M3/H2/SL350/Panamera 4/
Join Date: Mar 2009
Location: Turkey

iTrader: (0)

eventhough there is tons of dyno proofs , i cant make myself blieve those could gain that much HP!
__________________
http://www.youtube.com/user/Ferre86

| e93 M-DCT ESS VT2-625 | Akra Slip-on | Challenge Race Catless x-pipe | Challenge front lip | Challenge Diffuser | Carbon front grilles | defi gauges control unit | Macht Schnell gauge panel | E93 M3 trunk Spoiler | IND Carbon Fiber Side Markers |
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


All times are GMT -4. The time now is 06:33 PM.




m3post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2017, 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