New 2009 2010 BMW Z4 - ZPOST
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   New 2009 2010 BMW Z4 - ZPOST > BMW Z4 Forum (E89) > Engine, Transmission, Exhaust, Drivetrain, ECU Software Modifications

Post Reply
 
Thread Tools Search this Thread
      02-22-2024, 10:55 AM   #155
LittleBlackHawk
Private First Class
42
Rep
101
Posts

Drives: F30 --> E89
Join Date: Jun 2015
Location: Asia

iTrader: (0)

Quote:
Originally Posted by vadonchez View Post
Still trying to found answer about the possibility to put 4 spot brembo caliper from F30 M sport car on my Z4 35is 348x30 rotors

Idea is to keep unsprung mass as low as possible but improve calipers.

From what I can read from realoem, 4 spot F30 caliper are 1.5kg lighter than Z4 35is one spot oem caliper.
Add some ECStuning lightweight rotor wich add 1.2kg gain per side and i could expect to gain up to 2.5kg of unsprung weight per side!!
That could make a difference in ride quality.

Please if someone has the answer, let me know.
No, that is not possible unless you make custom brackets. But it is also pretty hard to make custom brackets on these F calipers due to very little space.
So in general, no. However, you can get the 370mm version F calipers and install the 370mm rotors.
Appreciate 0
      03-07-2024, 03:52 PM   #156
Steve Jarvis
Private First Class
Steve Jarvis's Avatar
26
Rep
108
Posts

Drives: BMW M4, BMW M550i, 911 Turbo
Join Date: Jul 2023
Location: North Carolina

iTrader: (0)

I thought I would add this information. I saw people adding front rotors/calipers without a rear upgrades and worried about the brake bias implications. I've done in excess of 10,000 track miles with half of those in a heavily modified MKIV Supra. I went through several brake configurations over the years and have a basic understanding of some of the pitfalls. Adding larger rotors and pads help with heat management and rotor/pad life, but adding more front brake bias is not good. You spend a meaningful amount time at less than 100% braking (trail braking) and this puts a greater load on the front brakes and reduces rear brake pressure. This uses less of the rear tire contact patch and can actually lengthen stopping distances. In most cases you want to add more rear bias to reduce stopping distances. Because of this, I decided to run some basic calculations to understand the impact of the BMW 135 front brake "upgrade" used by many. Don't get to caught up in the actual numbers as I used some basic assumptions for the pedal ratio, master cylinder piston diameter and resulting line pressure. The differences are more important. The good news is though the 135 front brakes have larger diameter rotors (more leverage) and visually larger caliper, the actual brake torque is less than the stock 35i front brakes. This means 135 front brakes and 35i rear brake are a nice street setup with the ability to dissipate more heat than the stock brakes and still have good brake balance. Using the 135 front brakes with the stock 35is rear brakes actually keeps the bias almost identical to the stock 135 and Z4 35is setup. Please let me know if I have any of the specifications for the rotor or piston diameters incorrect and I will update the sheet.
Attached Images
File Type: pdf Brake Comparison Z4.pdf (21.4 KB, 204 views)
__________________
2011 BMW Z4 35i 6sp wh/rd
2017 BMW M4 Comp DCT blk/blk
2001 Porsche 911 Turbo 6sp blk/blk
Appreciate 2
B21296.50
Tangent327.00
      03-26-2024, 01:23 PM   #157
sangers
New Member
0
Rep
10
Posts

Drives: z4
Join Date: Jan 2016
Location: Seattle

iTrader: (0)

Hi all. Sorry if this has been mentioned , I couldn’t find it in this thread. Has anyone tried fitting M240i brake calipers? Are they the same as M235i?
Appreciate 0
      03-30-2024, 09:08 AM   #158
B21
Captain
B21's Avatar
297
Rep
981
Posts

Drives: E89 Atacama Yellow 35is
Join Date: May 2022
Location: Scotland..God’s own country

iTrader: (0)

No mention from anyone of coding ‘performance brake’ option in VO?

Discuss!
__________________
Much modified 2011 Atacama Yellow 35is…previously a much modified 2012 Atacama Yellow 20i MSport
Change history here… https://www.dropbox.com/s/8h1vabklgz...0List.pdf?dl=0
Build thread here… https://z4-forum.com/forum/viewtopic.php?t=131886
Appreciate 0
      11-05-2024, 12:48 PM   #159
B21
Captain
B21's Avatar
297
Rep
981
Posts

Drives: E89 Atacama Yellow 35is
Join Date: May 2022
Location: Scotland..God’s own country

iTrader: (0)

380 mm F series upgrade

Trial fit of 380 mm 30 mm M4 disc with series 4 pot caliper..

Caliper looked big in isolation..not looking so big now!
Attached Images
 
__________________
Much modified 2011 Atacama Yellow 35is…previously a much modified 2012 Atacama Yellow 20i MSport
Change history here… https://www.dropbox.com/s/8h1vabklgz...0List.pdf?dl=0
Build thread here… https://z4-forum.com/forum/viewtopic.php?t=131886
Appreciate 0
      11-08-2024, 08:30 AM   #160
MRCW
Private First Class
54
Rep
150
Posts

Drives: Z4 35i X1 35i
Join Date: Oct 2022
Location: Florida

iTrader: (0)

Quote:
Originally Posted by B21 View Post
No mention from anyone of coding ‘performance brake’ option in VO?

Discuss!
I am starting to explore this as I'm working on my 2013 X1 35i MSport build to light track car...

I think there are more mods to do with DSC module and others...i think the biggest issue is the initial brake feel...

Certainly would be interested in what is offered for the Z4 as tweaks but I'm not really interested in addtional part replacement performance mods for my Z4 other than the simple stage 1 MHD tune
Appreciate 0
      11-08-2024, 03:59 PM   #161
B21
Captain
B21's Avatar
297
Rep
981
Posts

Drives: E89 Atacama Yellow 35is
Join Date: May 2022
Location: Scotland..God’s own country

iTrader: (0)

Quote:
Originally Posted by MRCW View Post
I am starting to explore this as I'm working on my 2013 X1 35i MSport build to light track car...

I think there are more mods to do with DSC module and others...i think the biggest issue is the initial brake feel...

Certainly would be interested in what is offered for the Z4 as tweaks but I'm not really interested in addtional part replacement performance mods for my Z4 other than the simple stage 1 MHD tune
You ‘just’ code the performance brake option ‘on’ in the vehicle order..Simple’s
__________________
Much modified 2011 Atacama Yellow 35is…previously a much modified 2012 Atacama Yellow 20i MSport
Change history here… https://www.dropbox.com/s/8h1vabklgz...0List.pdf?dl=0
Build thread here… https://z4-forum.com/forum/viewtopic.php?t=131886
Appreciate 0
      11-09-2024, 09:48 AM   #162
MRCW
Private First Class
54
Rep
150
Posts

Drives: Z4 35i X1 35i
Join Date: Oct 2022
Location: Florida

iTrader: (0)

Quote:
Originally Posted by B21 View Post
You ‘just’ code the performance brake option ‘on’ in the vehicle order..Simple’s
Without any parts enhancements what does this get you in performance enhancements?

Just code it in thy VO? that's all?
Appreciate 0
      11-09-2024, 12:19 PM   #163
B21
Captain
B21's Avatar
297
Rep
981
Posts

Drives: E89 Atacama Yellow 35is
Join Date: May 2022
Location: Scotland..God’s own country

iTrader: (0)

Quote:
Originally Posted by MRCW View Post
Without any parts enhancements what does this get you in performance enhancements?

Just code it in thy VO? that's all?
Well the increased mass and better cooling of the rotor should improve heat fade..

The bigger swept area and bigger area pad should offer increaed friction

Apart from coding on an E89 there's not much you can do..the brake servo isn't interchangeable..

All E89s run the same servo irrespective if the sizes of the front and rear stock brakes..from 300 mm front and 284 rear through to 348 and 300 rear
__________________
Much modified 2011 Atacama Yellow 35is…previously a much modified 2012 Atacama Yellow 20i MSport
Change history here… https://www.dropbox.com/s/8h1vabklgz...0List.pdf?dl=0
Build thread here… https://z4-forum.com/forum/viewtopic.php?t=131886
Appreciate 0
      01-17-2025, 01:24 PM   #164
B21
Captain
B21's Avatar
297
Rep
981
Posts

Drives: E89 Atacama Yellow 35is
Join Date: May 2022
Location: Scotland..God’s own country

iTrader: (0)

Previously I’d discussed the evolution of various BBKs for E89s…

Of course there are several manufacturers and suppliers that will do bespoke BBKs for the front of E89s..it’s relatively simple for the fronts as essentially the E89 has the same fundamental front end design as non M E90s and E82s..give or take some offset/king pin issues..

So Alcon, AP racing and Brembo all do BBKs..around £3,000 upwards ..

Also Ceika and Performance Brakes in Taiwan and HK do pretty ones too..again same prices for decent multi pot bigger brakes..

My and others search has been about exploiting off the shelf products from BMW and their suppliers ..

Many folks even some E89s have gone down the route of F series M cars with 4 pot Brembo attached to 340/70/380 mm BMW discs..

My example in gold with a 340mm caliper upgraded to support a M2/M4 380mm disc..(caliper is the same for all disc sizes..just the mounting bracket size changes)

However..whilst I’m playing and following on from my success with creating 345mm and 370mm rear BBKs for the E89..s much tougher challenge due to the unique rear brake system of the E89 with integrated electronic parking brake..I couldn’t resist this next challenge.

And so..here is the next project..the Brembo BIG BBK using 2017-2023 Shelby Mustang Brembo made calipers sold and used by Ford on the 526-650 BHP versions..

The reason for this..apart from..because you can is..

These calipers..made by Brembo retail through the Ford dealer network for around 375 dollars ..but..you can get them discounted to around 250 USD..ironically the bright red ones are a few dollars cheaper than the matt grey version..red was for the the 350 GT the grey for the 350..

These are a monobloc design ie cast in one piece which makes it more difficult/ expensive to machine than a two part design as used on the M Performance /M2/M4 calipers..go figure..

For the E89 this is married to the same M2/M4 380mm diss but with a lot more pad and clamping force..

A US company has made an adapter bracket which I’ve imported..

However there are some issues to resolve..

First is front / rear bias..

So my BBK calculator..(others are available)..allows one to model the impact of various front / rear brake setups on the front / rear bias..

This BIG Ford based Brembo kit pushes the bias forward a lot in the absence of an E89 rear BBK..

However ..the B21 370mm rear E89 BBK brings the bias into the range between the 35is and the other E89s ..ie normal..

Second issue is master cylinder ..size ie bore diameter and leverage on the pedal..

This is an imponderable at this stage..

Some people…almost all in the US have tried this on E90s..some report some ‘soft’ peddle issues..

Others no issues..

Complicating matters there are two electronic options..

The E90/E89 has an option in the Vehicle Order to code ‘SPBR’..BMWs then 6 pot Brembo…however this boy is a bit bigger all round …

Secondly ISTA offers DSC recalibration..where the DSC recalibrates its management of the calipers pads by analysing the current forces acting on the discs / pads and recalibrating its system to ‘optimise’ response..

Frankly until it’s all bolted up..programmed and tested..who knows..

You’ll be relieved that I’ll be refinishing the Brembo in a touching Phoenix Gold….

Pics show a rear caliper of a F series about the same size as an E89 front caliper ..plus the 340/370/380 BMW/Brembo front caliper and the FoMoCo/Brembo Shelby Mustang front caliper plus their associated pads..

Enjoy!
Attached Images
      
__________________
Much modified 2011 Atacama Yellow 35is…previously a much modified 2012 Atacama Yellow 20i MSport
Change history here… https://www.dropbox.com/s/8h1vabklgz...0List.pdf?dl=0
Build thread here… https://z4-forum.com/forum/viewtopic.php?t=131886
Appreciate 0
      01-19-2025, 01:03 PM   #165
B21
Captain
B21's Avatar
297
Rep
981
Posts

Drives: E89 Atacama Yellow 35is
Join Date: May 2022
Location: Scotland..God’s own country

iTrader: (0)

Attention moves to the front end..the existing BBK..the trusty E82/E90 6 pot Brembo with 338mm x26mm discs removed for the new owner..

Current plan is still to fit the big Shelby Mustang Brembo 6 pot (bigger pots) with M2/M4 380mm 30mm discs..

However here’s the F series M Performance caliper (340m with adapter for 380mm discs)…

Also trial fit of 380mm M2 front dust shield..will need a little work but 3 out 4 holes line up..

The M Performance caliper is slightly lighter..the old Brembo s bit chunkier..but it does have harmonic weighs bolted on..

Enjoy..
Attached Images
       
__________________
Much modified 2011 Atacama Yellow 35is…previously a much modified 2012 Atacama Yellow 20i MSport
Change history here… https://www.dropbox.com/s/8h1vabklgz...0List.pdf?dl=0
Build thread here… https://z4-forum.com/forum/viewtopic.php?t=131886
Appreciate 0
      01-20-2025, 12:36 PM   #166
B21
Captain
B21's Avatar
297
Rep
981
Posts

Drives: E89 Atacama Yellow 35is
Join Date: May 2022
Location: Scotland..God’s own country

iTrader: (0)

Brackets for the 345mm E89 rear BBK arrived from the shop..
Attached Images
 
__________________
Much modified 2011 Atacama Yellow 35is…previously a much modified 2012 Atacama Yellow 20i MSport
Change history here… https://www.dropbox.com/s/8h1vabklgz...0List.pdf?dl=0
Build thread here… https://z4-forum.com/forum/viewtopic.php?t=131886
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 -5. The time now is 07:38 PM.




zpost
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2025, vBulletin Solutions Inc.
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