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


Go Back   ZPOST > BMW Z4 Technical Talk > Engine, Exhaust, Drivetrain Modifications
  TireRack

SUPPORT ZPOST BY DOING YOUR TIRERACK SHOPPING FROM THIS BANNER, THANKS!
Post Reply
 
Thread Tools Search this Thread
      11-21-2011, 11:56 AM   #23
ZStig
Major General
101
Rep
7,248
Posts

 
Drives: VT2-525 M Roadster
Join Date: Jun 2008
Location: Delray Beach, FL

iTrader: (3)

Would I be correct in assuming that for our supercharged application, the biggest performance gain would come from replacing the cats of section 1 with the DKF resonators and H pipes?
__________________
Appreciate 0
      11-21-2011, 03:27 PM   #24
l4zy
Captain
l4zy's Avatar
United_States
10
Rep
869
Posts

 
Drives: 95 M3, 13 X3
Join Date: Jan 2007
Location: San Gabriel, CA

iTrader: (11)

Garage List
wow awesome cant wait to see how all this comes out. maybe ill end up upgrading and driving with ear plugs on...haha
__________________
Appreciate 0
      11-21-2011, 03:58 PM   #25
Beedub
Brigadier General
United Kingdom
55
Rep
4,102
Posts

 
Drives: 2007 Z4 M roadster vt2-500
Join Date: Sep 2007
Location: UK

iTrader: (0)

Quote:
Originally Posted by Roffle Waffle View Post
Would I be correct in assuming that for our supercharged application, the biggest performance gain would come from replacing the cats of section 1 with the DKF resonators and H pipes?
Firstly id just like to say... WOW...... DKF..... youve made something of rare quality, definatly THE best solution for the z4m in terms of exhaust, youve knocked everything else out the park imo......

ok roffle.... i think for us the Best option would be, s-pipe, race cats, sport rear mufflers... This way we will get a nice sound and maximum flow, we will also keep some much needed back-pressure, being supercharged, we *could gain a good 30 crank Hp here, but will we loose valuable Tq??? i honestly dont know.....
The race cats being 100 cell will be the part that nets us our gain.....
we stand to REALLY gain from this exhaust roffle.... Big time... not to mention drop some weight.......

Will this work with our sensitive tunes???? who knows??
ESS told me they feel the stock Euro system is about as good as it gets for the s54 and they feel bmw made an amazing system...... i do agree they did an awesome job... but their can always be improvements.
__________________
Pristine Bi-colour Ti /Bsm...z4m roadster Ess vt2-500....Perfection on wheels.
Appreciate 0
      11-21-2011, 03:59 PM   #26
Beedub
Brigadier General
United Kingdom
55
Rep
4,102
Posts

 
Drives: 2007 Z4 M roadster vt2-500
Join Date: Sep 2007
Location: UK

iTrader: (0)

Chris, awesome work with this thread..... this will answer all my questions for me to move forward.........
__________________
Pristine Bi-colour Ti /Bsm...z4m roadster Ess vt2-500....Perfection on wheels.
Appreciate 0
      11-21-2011, 04:55 PM   #27
crfine88
Colonel
crfine88's Avatar
47
Rep
2,295
Posts

 
Drives: E86M
Join Date: Jan 2009
Location: Cave Creek AZ.

iTrader: (15)

update

Update: Added several photos to post number 4 related to component weight. More to come soon. Race cats and new hangers should be here on the 22nd

Quote:
Originally Posted by bluecobra View Post
Subscribing.....
welcome

Quote:
Originally Posted by 007MCoupe View Post
Great job Chris!! Subbed. You better make MFest this year is all I'm saying! I gotta check this beast out!! haha

But for real, I, for one, truly appreciate the amount of time you dedicate not only to your own ride but to contributing to this forum.
Thanks man, it really does take a lot of time to put all of this stuff together. I enjoy the process though; It is a nice break my day to day life as a typical working stiff.

I hope to make Mfest this year too (fingers crossed)
Good chance we may miss it again. The baby is due in mid March

Quote:
Originally Posted by Roffle Waffle View Post
Would I be correct in assuming that for our supercharged application, the biggest performance gain would come from replacing the cats of section 1 with the DKF resonators and H pipes?
All system configurations are suposed to make similar power, but the prood will be in the Dynos.

Quote:
Originally Posted by l4zy View Post
wow awesome cant wait to see how all this comes out. maybe ill end up upgrading and driving with ear plugs on...haha
Me too, each step I am learning something new!
There are quieter options avail. I just tend to lean toward the ear punishing side of the spectrum most of the time.

Quote:
Originally Posted by Beedub View Post
Firstly id just like to say... WOW...... DKF..... youve made something of rare quality, definatly THE best solution for the z4m in terms of exhaust, youve knocked everything else out the park imo......

Will this work with our sensitive tunes???? who knows??
ESS told me they feel the stock Euro system is about as good as it gets for the s54 and they feel bmw made an amazing system...... i do agree they did an awesome job... but their can always be improvements.
I agree with you Byron. I am blown away by having so many quality options for a low production car.

In regards to the tune, I talk to AJ with ESS about the exhaust system. He stated that the tune for our SC cars is actually more adaptive than the OEM tune. He believes that as long as our sensors are in place, that this system will be no problem. The proof will come with time and Dynos, but it was encouraging to here this new from the guy who writes the ESS tunes

Quote:
Originally Posted by Beedub View Post
Chris, awesome work with this thread..... this will answer all my questions for me to move forward.........
Thanks man,




Update: Added several photos to post number 4 related to component weight. More to come soon. Race cats and new hangers should be here on the 22nd
__________________
Appreciate 0
      11-21-2011, 05:14 PM   #28
esqu1re
Lieutenant Colonel
esqu1re's Avatar
23
Rep
1,858
Posts

 
Drives: M Coupe
Join Date: Jul 2010
Location: East Coast

iTrader: (0)

Here's to hoping the Street cans are not as loud as Diablos....
__________________


///M Coupe: RPI Scoop, OE Strut, CDV, Volk RE30, SS Brake Lines, Stromung Exhaust
Appreciate 0
      11-22-2011, 01:12 AM   #29
Jumbosock
Captain
Jumbosock's Avatar
10
Rep
810
Posts

 
Drives: 2007 M coupe
Join Date: Apr 2011
Location: San Diego

iTrader: (0)

You posted the wrong picture for the sport muffler weight.
Appreciate 0
      11-22-2011, 04:48 AM   #30
ga41
Lieutenant
ga41's Avatar
Cyprus
4
Rep
448
Posts

 
Drives: Z4 M Coupe
Join Date: Jun 2009
Location: Paphos

iTrader: (0)

Garage List
2006 Z4 M Coupe  [0.00]
Top thread mate. Looking forward to pouring over all the data and to reading your impressions.

Not much you guys can say but do you think this system will offer gains on an otherwise stock naturally aspirated car?
__________________
Appreciate 0
      11-22-2011, 06:01 PM   #31
Beedub
Brigadier General
United Kingdom
55
Rep
4,102
Posts

 
Drives: 2007 Z4 M roadster vt2-500
Join Date: Sep 2007
Location: UK

iTrader: (0)

Fuck it...... DKF put me down..... im in.
__________________
Pristine Bi-colour Ti /Bsm...z4m roadster Ess vt2-500....Perfection on wheels.
Appreciate 0
      11-23-2011, 08:03 AM   #32
crfine88
Colonel
crfine88's Avatar
47
Rep
2,295
Posts

 
Drives: E86M
Join Date: Jan 2009
Location: Cave Creek AZ.

iTrader: (15)

Quote:
Originally Posted by esqu1re View Post
Here's to hoping the Street cans are not as loud as Diablos....
They should be. I will do DB testing along with video clips to give you an idea of their tone and volume

Quote:
Originally Posted by Jumbosock View Post
You posted the wrong picture for the sport muffler weight.
Thank you, good catch.
fixed

Quote:
Originally Posted by ga41 View Post
Top thread mate. Looking forward to pouring over all the data and to reading your impressions.

Not much you guys can say but do you think this system will offer gains on an otherwise stock naturally aspirated car?
It is suposed to and I believed DKF is testing Dio's N/A M coupe. I will contact them to see what kind of results they are getting.

Quote:
Originally Posted by Beedub View Post
Fuck it...... DKF put me down..... im in.
Hey Byron,
I am picking up the 100 cell cats today, so I will be able to test the system you have been asking about
__________________
Appreciate 0
      11-23-2011, 10:55 AM   #33
Beedub
Brigadier General
United Kingdom
55
Rep
4,102
Posts

 
Drives: 2007 Z4 M roadster vt2-500
Join Date: Sep 2007
Location: UK

iTrader: (0)

Quote:
Originally Posted by crfine88 View Post
They should be. I will do DB testing along with video clips to give you an idea of their tone and volume


Thank you, good catch.
fixed



It is suposed to and I believed DKF is testing Dio's N/A M coupe. I will contact them to see what kind of results they are getting.



Hey Byron,
I am picking up the 100 cell cats today, so I will be able to test the system you have been asking about
yesssss..... now were talking!!! S-pipe, Race cats, Xpipe and Sport rear mufflers!!! i think this will be just slightly quieter than the RPI's, hell it may even be on parr in terms of loudness BUT.... i think we'll loose the horrific drone and more to the point, i hope to be able to hear my motor again, i rally want to hear the s54/supercharger doing its thing!!!! its a win win for sure!!
__________________
Pristine Bi-colour Ti /Bsm...z4m roadster Ess vt2-500....Perfection on wheels.
Appreciate 0
      11-23-2011, 11:14 AM   #34
Mirko
Captain
Mirko's Avatar
Canada
6
Rep
622
Posts

 
Drives: Z4M, E90 328i
Join Date: Apr 2011
Location: Toronto

iTrader: (2)

You do amazing work! Thank you. This is what I expect to see from vendors that want to sell their parts, especially if they make any specific claims about hp gains and weight reductions.
Appreciate 0
      11-23-2011, 05:05 PM   #35
inTgr8r
Major General
inTgr8r's Avatar
Canada
114
Rep
8,100
Posts

 
Drives: 07 M Coupe
Join Date: Mar 2006
Location: Toronto

iTrader: (7)


I've been trying to avoid this thread, because I know where it leads.
awesome work Chris!


I wish we had something this detailed for us NA guys.
__________________
Alpinweiss '07 M Coupe •DKF Section1•RPi GT exhaust•Fabspeed Headers•Autosolutions SSK•APR splitter•Tekarbon headlights•StrongStrut STB•H&R COs + ARBs•Poly FCAB/RTAB•Volk Racing G2•Direzza ZII•Stoptech BBK•Vibra-Tech mtr mounts•

Last edited by inTgr8r; 11-24-2011 at 10:05 AM.
Appreciate 0
      11-23-2011, 05:37 PM   #36
Kgolf31
Brigadier General
Kgolf31's Avatar
40
Rep
3,386
Posts

 
Drives: 2007 Z4MC, 2012 128i
Join Date: Sep 2008
Location: Ohio

iTrader: (3)

Awesome Thread! So much win in here.
__________________
12 128i Coupe - Project STX: TCKline l Active Autowerke l APEX l Vorshlag l Dunlop l Hawk l BMW Performance

Appreciate 0
      11-23-2011, 06:05 PM   #37
BTM
Banned
United_States
172
Rep
10,314
Posts

 
Drives: A///MERICAN!!!
Join Date: Mar 2010
Location: A///MERICA!!!

iTrader: (11)

Garage List
FWIW, here are the results of my OEM exhaust weight. Not a digital scale but was consistent with our digital one until it broke.

Muffler (x2): 22lbs




Xpipe: 15lbs


Appreciate 0
      11-27-2011, 01:54 AM   #38
crfine88
Colonel
crfine88's Avatar
47
Rep
2,295
Posts

 
Drives: E86M
Join Date: Jan 2009
Location: Cave Creek AZ.

iTrader: (15)

Quote:
Originally Posted by Beedub View Post
yesssss..... now were talking!!! S-pipe, Race cats, Xpipe and Sport rear mufflers!!! i think this will be just slightly quieter than the RPI's, hell it may even be on parr in terms of loudness BUT.... i think we'll loose the horrific drone and more to the point, i hope to be able to hear my motor again, i rally want to hear the s54/supercharger doing its thing!!!! its a win win for sure!!
Yes Sir, I am excited to get this stuff on the car for testing again. I am about 99% done collecting the test data with the OEM exhaust. Just have to run a couple of videos and then it is on to the DKF system.

If the system works as designed, the drone will be greatly reduced and possibly eliminated. If this is the case, then would be able to run a system just as loud as our RPI's but without the head pounding effects of the drone. All the raw motor sport burbles and pops during deceleration and down shifting, the same primal growl at WOT, and none of the headache. Win, Win

Quote:
Originally Posted by Mirko View Post
You do amazing work! Thank you. This is what I expect to see from vendors that want to sell their parts, especially if they make any specific claims about hp gains and weight reductions.
Thank you, this has become a hobby for me. I really injoy getting down the bottom line with real data on "upgrades"

Quote:
Originally Posted by inTgr8r View Post

I've been trying to avoid this thread, because I know where it leads.
awesome work Chris!

I wish we had something this detailed for us NA guys.
lol, thank you Ian


I will pass that along to DKF

Quote:
Originally Posted by Kgolf31 View Post
Awesome Thread! So much win in here.
Thanks

Quote:
Originally Posted by BTM View Post
FWIW, here are the results of my OEM exhaust weight. Not a digital scale but was consistent with our digital one until it broke.

Muffler (x2): 22lbs
.
Good info, I will add the OEM stuff to the weight section soon.
Thanks for adding it in


Update Post #2:
-100 cell race cats
-New section added for DKF Hangers
-New section added for DKF adaptor and connecting elements for OEM interface

Update Post #4: Weights for 100 cell cats and new Hangers added


Name:  Hang2.jpg
Views: 327
Size:  223.0 KBName:  Rcat2.jpg
Views: 330
Size:  234.4 KBName:  Adptr1.jpg
Views: 329
Size:  252.1 KBName:  RaceToOEX1.jpg
Views: 327
Size:  243.4 KB
__________________

Last edited by crfine88; 11-27-2011 at 02:17 AM.
Appreciate 0
      11-27-2011, 02:13 AM   #39
Finnegan
Major General
Finnegan's Avatar
United_States
80
Rep
6,507
Posts

 
Drives: Sapphire Black/Black Z4Mc
Join Date: Oct 2008
Location: At the track..or wishing I were at the track

iTrader: (18)

Quote:
Originally Posted by inTgr8r View Post

I've been trying to avoid this thread, because I know where it leads.
awesome work Chris!

I wish we had something this detailed for us NA guys.
I'm so with you buddy. I tried to stay away from DKF's thread too, but couldn't help myself. Then I heard the sound clip. That pretty much sealed the deal. (Several friends have heard it too, the response was .) ssuming the drone has been tamed (and there's very good reason to believe it has) I'm in!

Another stellar thread by Chris!

Quote:
Originally Posted by crfine88 View Post

I will pass that along to DKF
Thanks Chris. Incredible thread as usual!

Last edited by Finnegan; 11-27-2011 at 02:19 AM.
Appreciate 0
      11-27-2011, 09:14 AM   #40
inTgr8r
Major General
inTgr8r's Avatar
Canada
114
Rep
8,100
Posts

 
Drives: 07 M Coupe
Join Date: Mar 2006
Location: Toronto

iTrader: (7)

Quote:
Originally Posted by Finnegan View Post
.... assuming the drone has been tamed (and there's very good reason to believe it has) I'm in!

Another stellar thread by Chris!
Thanks Chris. Incredible thread as usual!
Rasp is the other concern for me.
__________________
Alpinweiss '07 M Coupe •DKF Section1•RPi GT exhaust•Fabspeed Headers•Autosolutions SSK•APR splitter•Tekarbon headlights•StrongStrut STB•H&R COs + ARBs•Poly FCAB/RTAB•Volk Racing G2•Direzza ZII•Stoptech BBK•Vibra-Tech mtr mounts•
Appreciate 0
      11-28-2011, 12:17 AM   #41
crfine88
Colonel
crfine88's Avatar
47
Rep
2,295
Posts

 
Drives: E86M
Join Date: Jan 2009
Location: Cave Creek AZ.

iTrader: (15)

Quote:
Originally Posted by Finnegan View Post
I'm so with you buddy. I tried to stay away from DKF's thread too, but couldn't help myself. Then I heard the sound clip. That pretty much sealed the deal. (Several friends have heard it too, the response was .) ssuming the drone has been tamed (and there's very good reason to believe it has) I'm in!

Another stellar thread by Chris!



Thanks Chris. Incredible thread as usual!
Quote:
Originally Posted by inTgr8r View Post
Rasp is the other concern for me.
Thanks guys, appreciate the support.
Reviews and videos of the DKF systems coming soon since I am finally done with dynos/videos/weights for the OEM stuff as of this weekend


Update: Group buy pricing released by DKF and GB interest listed started on page 1 Post #9
__________________
Appreciate 0
      11-28-2011, 02:05 AM   #42
Jumbosock
Captain
Jumbosock's Avatar
10
Rep
810
Posts

 
Drives: 2007 M coupe
Join Date: Apr 2011
Location: San Diego

iTrader: (0)

1. crfine88
2. jumbosock
3.
4.
5.
6.
7.
8.
9.
10
Appreciate 0
      11-28-2011, 04:11 AM   #43
habitat412
Private First Class
1
Rep
113
Posts

 
Drives: 2008 Z4 M Coupe
Join Date: Mar 2011
Location: St. Louis

iTrader: (1)

1. crfine88
2. jumbosock
3. habitat412
4.
5.
6.
7.
8.
9.
10.
Appreciate 0
      11-28-2011, 07:43 AM   #44
tikamak
Captain
Lebanon
13
Rep
791
Posts

 
Drives: 2006 Z4M Roadster TiAG/black
Join Date: Jun 2011
Location: Beirut

iTrader: (0)

OMG, they are expensive even with the group buy

you need to go very loud to have an acceptable price
Appreciate 0
Post Reply

Bookmarks

Tags
awesome sauce

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 10:14 AM.




zpost
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