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

Go Back   BMW M3 and BMW M4 Forum > BMW F80 M3 / F82 M4 Forum > BMW M3 (F80) and BMW M4 (F82) General Forum

Post Reply
 
Thread Tools Search this Thread
      07-28-2014, 04:25 PM   #45
Dackelone
European Editor
Dackelone's Avatar
Germany
10512
Rep
22,992
Posts

Drives: N54 e82
Join Date: Feb 2010
Location: Bayern, Germany

iTrader: (1)

Quote:
Originally Posted by irablumberg View Post
This is great stuff. However, unless I missed it, there is no mention of the torque spec for the wheel bolts. Anyone have any ideas about that torque spec?
It should be 130 Nm just like for other BMW models.
Appreciate 0
      07-28-2014, 05:25 PM   #46
crypticc
Captain
United Kingdom
73
Rep
963
Posts

Drives: e92 M3 DCT + Comp
Join Date: Dec 2011
Location: London, UK

iTrader: (0)

Quote:
Originally Posted by SYT_Shadow View Post
I searched, didn't find anything here
709 for s65 is first link in Google when I looked.
Must try harder

http://bit.ly/1qHQxNS


Another great PDF to google is. BMW-M3-Aftersales-Training--Information.pdf


You know what to do now
Appreciate 0
      07-28-2014, 05:41 PM   #47
flinchy
Brigadier General
124
Rep
3,099
Posts

Drives: E82 135i
Join Date: Nov 2011
Location: QLD, Australia

iTrader: (0)

Quote:
Originally Posted by Caelric View Post
In general, the more pistons, the better, when it comes to brakes. Obviously, there is the cost of the psitons to worry about, but more pistons, means more surface contact with the pad) resulting in a greater area of contact on the pad), more mass to absorb heat, and overall better performance. Two smaller pistons might even weigh less than a single larfge piston, while still having greater contact area on the pad.
pistons give better pedal FEEL, but not necessarily better performance/pad contact with the ROTOR.
Appreciate 0
      07-28-2014, 06:08 PM   #48
Remonster
Lieutenant Colonel
United_States
821
Rep
1,583
Posts

Drives: E90 M3
Join Date: Dec 2007
Location: San Diego

iTrader: (0)

Quote:
Originally Posted by JoeFromPA View Post
- If I'm reading this right, the engine oil cooler is the radiator at the lowest point to the ground and laying flat. Odd design to me; guessing there is underbody routing of air to that radiator at the front lower grill/air dam.
If you look at an M5 / M6, they have the same design where one of the heat exchangers is laying flat. Look down at the center section of the front bumper.

Thanks for the summary, I don't have time to look through all the info now but the points you mentioned are very impressive.
Appreciate 0
      07-28-2014, 08:42 PM   #49
bradleyland
TIM YOYO
United_States
1504
Rep
3,282
Posts

Drives: 2013 M3
Join Date: Jun 2010
Location: Vero Beach, FL

iTrader: (0)

Garage List
Quote:
Originally Posted by M3 Adjuster View Post
BMW has used single piston calipers for decades.

The first BMW vehicle to recently have multiple piston calipers was the 135 which had multi piston setups that were not as good as the brakes on your e9x and 1M.
Wasn't the problem with the 135i brakes a materials problem though, not really related to the number of pistons. IIRC, the issue was the piston seals, right? They'd burn up under heavy use.
__________________
His: 2019 R1250GS - Black
Hers: 2013 X3 28i - N20 Mineral Silver / Sand Beige / Premium, Tech
Past: 2013 ///M3 - Interlagos Blue Black M-DCT
Past: 2010 135i - TiAg Coral Red 6MT ///M-Sport
Appreciate 0
      07-28-2014, 09:57 PM   #50
SickFinga
Captain
1329
Rep
691
Posts

Drives: *
Join Date: Jul 2012
Location: *

iTrader: (0)

Quote:
Originally Posted by ynguldyn View Post
You won't be able to find anything recent with a Google search. In any case, I don't think F22 course has been published yet.
ST1313

Quote:
Originally Posted by M3 Adjuster View Post
BMW has used single piston calipers for decades.

The first BMW vehicle to recently have multiple piston calipers was the 135 which had multi piston setups that were not as good as the brakes on your e9x and 1M.
E38 (except 740 and 750), E31 and E34 M5 3.8l had a dual piston caliper
Appreciate 0
      07-28-2014, 10:15 PM   #51
snaimpally
Major
United_States
136
Rep
1,192
Posts

Drives: 2011 335i MT
Join Date: Mar 2014
Location: Austin, TX

iTrader: (9)

Garage List
2011 BMW 335i  [0.00]
Cool! Thanks for sharing.
__________________
PTF Map, Pure Turbo Stage 1, GFB DV+, Mfactory LSD, AA FMIC, B12 Pro Kit, M3 FCA, AR DP and
Dynavin N6, Mosconi AS100.4, AS100.4, AS200.2, Micro Precision tweeters & woofers, Esotar2 1200
Appreciate 0
      07-28-2014, 11:46 PM   #52
ynguldyn
Brigadier General
7580
Rep
3,423
Posts

Drives: battery powered tv on wheels
Join Date: Jun 2010
Location: Boston

iTrader: (0)

Quote:
Originally Posted by SickFinga View Post
ST1313
What would we do if those Germans weren't so precise and consistent?

Reading it now.
Appreciate 0
      07-29-2014, 07:02 AM   #53
Caelric
Banned
4
Rep
103
Posts

Drives: n/a
Join Date: Mar 2014
Location: San Diego/AFG

iTrader: (0)

Interesting reading the S55 engine guide. Looks like both the engine coolant system and the charge air coolant system have a main and a auxilliary radiator. In other words, for the engine coolant, there is one large radiator in center front, and another auxiliary radiator on the passenger (right) front side.

Same thing for the charge air coolant, a larger one center front (in front of the engine coolant radiator) and an auxilliary one to the left (drivers) side.

Wonder what the reasoning behind that is, wanted to use the extra space to increase cooling capacity?
Appreciate 0
      07-29-2014, 10:20 AM   #54
SYT_Shadow
///M Powered for Life
SYT_Shadow's Avatar
11421
Rep
10,296
Posts

Drives: E90M/E92M/M4GTS/M4GT4/X5M
Join Date: Sep 2010
Location: Greenwich, CT

iTrader: (2)

Quote:
Originally Posted by crypticc View Post
709 for s65 is first link in Google when I looked.
Must try harder

http://bit.ly/1qHQxNS


Another great PDF to google is. BMW-M3-Aftersales-Training--Information.pdf


You know what to do now
I actually did google and didn't find it :/

Thanks a lot!!!
Appreciate 0
      07-29-2014, 10:24 AM   #55
SYT_Shadow
///M Powered for Life
SYT_Shadow's Avatar
11421
Rep
10,296
Posts

Drives: E90M/E92M/M4GTS/M4GT4/X5M
Join Date: Sep 2010
Location: Greenwich, CT

iTrader: (2)

Quote:
Originally Posted by Dackelone View Post
Thank you!
Appreciate 1
      07-29-2014, 10:51 AM   #56
Carl L
Major
Carl L's Avatar
196
Rep
1,248
Posts

Drives: '15 M3
Join Date: Aug 2012
Location: West Coast

iTrader: (0)

Quote:
Originally Posted by M3 Adjuster View Post
BMW has used single piston calipers for decades.

The first BMW vehicle to recently have multiple piston calipers was the 135 which had multi piston setups that were not as good as the brakes on your e9x and 1M.
Just because BMW has been using something for decades does make it good, just as the reason for the 135 brakes not being as good as the last couple of M cars is not due to the increased number of calipers.
Appreciate 0
      07-29-2014, 10:59 AM   #57
ASAP
Major General
ASAP's Avatar
10057
Rep
8,567
Posts

Drives: '23 X3 M40i
Join Date: Sep 2012
Location: FL

iTrader: (0)

It's funny, I have a 135... and had a 335. Yes the 135 brakes look better but are actually worse in terms of performance and squeal no matter what. I have however taken to them to the track for a 20 minute session and they performed flawlessly. The biggest issue with any BMW brake setup is the dust... many say that aftermarket pads help.
__________________
2 x N54 -> 1 x N55 -> 1 x S55-> 1 x B58
Appreciate 0
      07-29-2014, 11:31 AM   #58
Remonster
Lieutenant Colonel
United_States
821
Rep
1,583
Posts

Drives: E90 M3
Join Date: Dec 2007
Location: San Diego

iTrader: (0)

Quote:
Originally Posted by ASAP View Post
It's funny, I have a 135... and had a 335. Yes the 135 brakes look better but are actually worse in terms of performance and squeal no matter what. I have however taken to them to the track for a 20 minute session and they performed flawlessly. The biggest issue with any BMW brake setup is the dust... many say that aftermarket pads help.
My experience has been the opposite, I also had a 135i and a 335is and I vastly preferred the brakes on my 135i. They were easier to modulate, had better bite & stopping power, and resisted fade better. Both cars had the same Michelin Pilot Super Sport tires in the same 225/255 sizes.

Did your 335i have 18" wheels? My 335is is on style 313 19s so I wonder if the weight/size of those is affecting the braking performance (I have no idea how much 313s weigh, they look like they're pretty light but they're still big wheels).
Appreciate 0
      07-29-2014, 12:43 PM   #59
CSBM5
Brigadier General
CSBM5's Avatar
2696
Rep
3,316
Posts

Drives: 2019 M2 Comp, 2011 M3, etc
Join Date: Nov 2005
Location: Greenville, SC

iTrader: (2)

Quote:
Originally Posted by JoeFromPA View Post
Some more cool stuff:
- The LI-Ion battery is expected to live 2x as long (wow). So maybe 100k miles/8-10 years on average? If so, the expense of the battery is better justified...
Note they also said use a Li-ion specific battery charger in order to not exceed max Li-ion battery charging voltage (or charging rate at cold ambient temps).

These two docs are great to read and full of cool stuff as you've said. I especially enjoyed the S55/N55 comparison data.

Also, I noted that the F80 M3 has a 13% increase in aerodynamic drag (Cd x Af) compared to the E90 M3. It suffers from an increased frontal area (of course, due to size of car) and also a higher Cd.

Reading through all of these just reinforces how complexity is spiraling upward in car design at a very steep slope...for better or worse.
__________________
Current Stable:
2024 G20 M340i Melbourne Red/Cognac
2019 F87 M2 Competition 6MT, LBB, slicktop, exec pkg
2007 E91 328i Silver, slushbox, Eibach fr/E93 M3 rear sway bars, ARC-8
Appreciate 0
      07-29-2014, 12:46 PM   #60
BMW M3 CRT
Lieutenant
BMW M3 CRT's Avatar
177
Rep
464
Posts

Drives: BMW
Join Date: Oct 2013
Location: Germany

iTrader: (0)

Nice find ... thanks for sharing.

BUT the engine weight of the S65 is sadly wrong ... according to all availiable informations the S65 weights 202kg and not 212kg !!!
Appreciate 0
      07-29-2014, 01:24 PM   #61
Jockey
Brigadier General
Jockey's Avatar
3439
Rep
4,980
Posts

Drives: 992 C4S
Join Date: Mar 2008
Location: Park City, UT

iTrader: (1)

Quote:
Originally Posted by bradleyland View Post
Wasn't the problem with the 135i brakes a materials problem though, not really related to the number of pistons. IIRC, the issue was the piston seals, right? They'd burn up under heavy use.
Yep, it was the piston seals that were causing problems from track duty
Appreciate 0
      07-29-2014, 01:38 PM   #62
Pavit
Private First Class
Pavit's Avatar
Mauritius
50
Rep
140
Posts

Drives: Bimmer Beauty
Join Date: Oct 2011
Location: Mauritius

iTrader: (0)

Garage List
Oh Goodness!

Thanks for sharing!

\moi digs in...
Appreciate 0
      07-29-2014, 02:54 PM   #63
X6mac
New Member
2
Rep
27
Posts

Drives: X6 40d xDrive LCI
Join Date: Oct 2013
Location: London

iTrader: (0)

Quote:
Originally Posted by Rev ///Me
Very useful. Lots of good information!

Complete F80 M3 / F82 M4 technical docs and S55 engine technical doc.

PDF documents for download:
I can't see the attachment, have I missed out?!? :
Appreciate 0
      07-29-2014, 10:40 PM   #64
The Automotive Enthusiast
Retired BMW Genius
The Automotive Enthusiast's Avatar
United_States
2888
Rep
3,404
Posts

Drives: 2018 Audi S5 Coupe
Join Date: Apr 2010
Location: DMV

iTrader: (1)

Quote:
Originally Posted by X6mac View Post
I can't see the attachment, have I missed out?!? :
You'll have to use a computer. It doesn't show up on the mobile app.
__________________
Quote:
Originally Posted by LucBroDude View Post
TRAITOR.
Quote:
Originally Posted by LucBroDude View Post
TRAITOR.
Appreciate 0
      07-30-2014, 12:34 AM   #65
Sir Loin
M3AT LOVER
Sir Loin's Avatar
United_States
322
Rep
1,853
Posts

Drives: Silverstone F80 M3
Join Date: Aug 2013
Location: Seattle

iTrader: (0)

Interesting that M-DCT has worse MPG in the US, but better l/100km in the engine doc.
Attached Images
 
__________________
2015 F80 M3 | SSII ext SO int | M-DCT | 19" Black Wheels
Appreciate 0
      07-30-2014, 01:19 AM   #66
swamp2
Lieutenant General
swamp2's Avatar
United_States
609
Rep
10,407
Posts

Drives: E92 M3
Join Date: Sep 2006
Location: San Diego, CA USA

iTrader: (3)

Quote:
As the S55 engine is based on the N55 engine, 75% of the engine components were adopted from the N55 production engine and the other 25% of the engine components are new developments.
That certainly definitively settles many prior debates... Bespoke or not, cost, cylinder spacing, etc., etc.
__________________
E92 M3 | Space Gray on Fox Red | M-DCT | CF Roof | RAC RG63 Wheels | Brembo 380mm BBK |
| Vorsteiner Ti Exhaust | Matte Black Grilles/Side Gills/Rear Emblem/Mirrors |
| Alekshop Back up Camera | GP Thunders | BMW Aluminum Pedals | Elite Angels |
| XPEL Full Front Wrap | Hardwired V1 | Interior Xenon Light Kit |
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 06:44 AM.




f80post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, 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