Autotalent
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 Technical Topics > Engine / Drivetrain / Exhaust / Bolt-ons / Tuning

Post Reply
 
Thread Tools Search this Thread
      11-04-2019, 06:02 AM   #89
X.X.I.V
Lieutenant
X.X.I.V's Avatar
United_States
68
Rep
436
Posts

Drives: 16 F80
Join Date: Sep 2009
Location: Glenview, IL

iTrader: (0)

Quote:
Originally Posted by jpy1980 View Post
I think we finally found confirmed case of a crank hub fatigue with just the CBC on:

https://f87.bimmerpost.com/forums/sh....php?t=1662729

Although this guy seriously money shifted his car and ruined everything else, he did claim he had the CBC on at the time. Would this count?
Quote:
Originally Posted by jpy1980 View Post
I think we finally found confirmed case of a crank hub fatigue with just the CBC on:

https://f87.bimmerpost.com/forums/sh....php?t=1662729

Although this guy seriously money shifted his car and ruined everything else, he did claim he had the CBC on at the time. Would this count?
Money shift is an understatement, this would not qualify as a case of SCH. My vote would be no
Appreciate 3
      11-04-2019, 07:30 AM   #90
Kev608
First Lieutenant
Kev608's Avatar
United_States
132
Rep
334
Posts

Drives: M4 Competition
Join Date: Oct 2019
Location: Madison, WI

iTrader: (0)

Quote:
Originally Posted by jpy1980 View Post
I think we finally found confirmed case of a crank hub fatigue with just the CBC on:

https://f87.bimmerpost.com/forums/sh....php?t=1662729

Although this guy seriously money shifted his car and ruined everything else, he did claim he had the CBC on at the time. Would this count?
This guy clearly caused this for himself. Sorry, but I don't think we can blame the CBC for not holding up at 9500 rpm on a mis-shift.
Appreciate 4
      11-04-2019, 12:49 PM   #91
6SPD GOD
First Lieutenant
6SPD GOD's Avatar
United_States
83
Rep
325
Posts

Drives: 2016 M4 ZCP 6SP
Join Date: Mar 2017
Location: California

iTrader: (0)

Exclamation

Quote:
Originally Posted by jpy1980 View Post
I think we finally found confirmed case of a crank hub fatigue with just the CBC on:

https://f87.bimmerpost.com/forums/sh....php?t=1662729

Although this guy seriously money shifted his car and ruined everything else, he did claim he had the CBC on at the time. Would this count?
From a personal perspective, I do not believe we can label this incident as a SCH since the failure was due to a shifting mistake from the driver. A CBC cannot out-weight the severe stress a "money-shift" of that magnitude would put on the internals.

With that said,

We are still in the clear for no SCH (from normal circumstances; no driver error involved) while using CBC.
Appreciate 0
      11-04-2019, 12:50 PM   #92
tom @ eas
BimmerPost Supporting Vendor
tom @ eas's Avatar
United_States
4955
Rep
17,142
Posts


Drives: BMW
Join Date: Nov 2005
Location: Anaheim, CA

iTrader: (19)

Garage List
2018 BMW i3s  [0.00]
2010 BMW M3  [5.00]
2015 BMW M4  [3.50]
Quote:
Originally Posted by jpy1980 View Post
I think we finally found confirmed case of a crank hub fatigue with just the CBC on:

https://f87.bimmerpost.com/forums/sh....php?t=1662729

Although this guy seriously money shifted his car and ruined everything else, he did claim he had the CBC on at the time. Would this count?
Absolutely it would. The crank hub still slipped.
__________________
Tom G. | european auto source (eas)
email: tom@europeanautosource.com web: www.europeanautosource.com tel 866.669.0705 ca: 714.369.8524 x22

GET DAILY UPDATES ON OUR BLOG FACEBOOK YOUTUBE FLICKR INSTAGRAM
Appreciate 0
      11-04-2019, 12:55 PM   #93
6SPD GOD
First Lieutenant
6SPD GOD's Avatar
United_States
83
Rep
325
Posts

Drives: 2016 M4 ZCP 6SP
Join Date: Mar 2017
Location: California

iTrader: (0)

Quote:
Originally Posted by tom @ eas View Post
Absolutely it would. The crank hub still slipped.
Driver error involved, not a design flaw.
Appreciate 3
      11-04-2019, 02:13 PM   #94
behindthen0thing
Captain
behindthen0thing's Avatar
728
Rep
836
Posts

Drives: M4
Join Date: Jul 2018
Location: Germany

iTrader: (0)

Quote:
Originally Posted by tom @ eas View Post
Absolutely it would. The crank hub still slipped.
So does this count as a bearing failure as well? or what ever other components were damaged, valve train etc?
Appreciate 0
      11-04-2019, 03:17 PM   #95
Kev608
First Lieutenant
Kev608's Avatar
United_States
132
Rep
334
Posts

Drives: M4 Competition
Join Date: Oct 2019
Location: Madison, WI

iTrader: (0)

Quote:
Originally Posted by behindthen0thing View Post
So does this count as a bearing failure as well? or what ever other components were damaged, valve train etc?
Haha, exactly this! The parts didn't fail. The driver effed up. He even said so himself. This is on him, not the car. Drive any high powered car to redline in fourth and try slamming it into third with your foot down. I'll wait.
Appreciate 3
      11-04-2019, 07:11 PM   #96
Beemerm3
First Lieutenant
Beemerm3's Avatar
56
Rep
333
Posts

Drives: 16' BMW m3
Join Date: Jul 2019
Location: Sacramento

iTrader: (0)

The point of having a cbc on is saving ur self from paying 4000$ to repair what u been revving on. It's not necessary a broken crank hub that one didn't predict happen.
Appreciate 0
      11-05-2019, 04:04 PM   #97
///BMW Junkie
Captain
///BMW Junkie's Avatar
United_States
298
Rep
825
Posts

Drives: AW M4
Join Date: Mar 2014
Location: Washington DC

iTrader: (0)

I'm ok with this scenario as the first CBC "failure" 😏
__________________
Pure F82
Appreciate 0
      11-05-2019, 08:45 PM   #98
Chris@VargasTurboTech
BimmerPost Supporting Vendor
1722
Rep
1,486
Posts


Drives: All Things TurboCharged
Join Date: May 2016
Location: Bay Area

iTrader: (0)

Money shifting is always a sad day.
Appreciate 0
      11-05-2019, 08:45 PM   #99
6SPD GOD
First Lieutenant
6SPD GOD's Avatar
United_States
83
Rep
325
Posts

Drives: 2016 M4 ZCP 6SP
Join Date: Mar 2017
Location: California

iTrader: (0)

Quote:
Originally Posted by ///FastEuro View Post
I'm ok with this scenario as the first CBC "failure" 😏
We cannot count it towards a design flaw. This is purely due to driver error.
Appreciate 0
      11-06-2019, 05:40 AM   #100
RevNev
Lieutenant
322
Rep
508
Posts

Drives: X3 M40i
Join Date: Oct 2018
Location: Australia

iTrader: (0)

Quote:
Originally Posted by 6SPD GOD View Post
We cannot count it towards a design flaw. This is purely due to driver error.
Correct. The object of the CBC isn't to save the engine from money shifts, it's to prevent the hub slipping driving the car to it's maximum performance potential properly.
Appreciate 0
      11-06-2019, 10:36 AM   #101
///BMW Junkie
Captain
///BMW Junkie's Avatar
United_States
298
Rep
825
Posts

Drives: AW M4
Join Date: Mar 2014
Location: Washington DC

iTrader: (0)

Quote:
Originally Posted by 6SPD GOD View Post
Quote:
Originally Posted by ///FastEuro View Post
I'm ok with this scenario as the first CBC "failure" 😏
We cannot count it towards a design flaw. This is purely due to driver error.
Quote:
Originally Posted by 6SPD GOD View Post
Quote:
Originally Posted by ///FastEuro View Post
I'm ok with this scenario as the first CBC "failure" 😏

Correct. The object of the CBC isn't to save the engine from money shifts, it's to prevent the hub slipping driving the car to it's maximum performance potential properly.
Agreed. I was being sarcastic 😉
__________________
Pure F82
Appreciate 0
      11-06-2019, 12:01 PM   #102
jpy1980
Lieutenant Colonel
jpy1980's Avatar
United_States
1500
Rep
1,966
Posts

Drives: 2015 BMW M3 -Smurfy Blue Vinyl
Join Date: Sep 2018
Location: Los Angeles

iTrader: (2)

I see that the title has been revised! Nice!
Appreciate 0
      11-06-2019, 03:19 PM   #103
6SPD GOD
First Lieutenant
6SPD GOD's Avatar
United_States
83
Rep
325
Posts

Drives: 2016 M4 ZCP 6SP
Join Date: Mar 2017
Location: California

iTrader: (0)

Talking

Quote:
Originally Posted by jpy1980 View Post
I see that the title has been revised! Nice!
Fine tuning my friend!
Appreciate 1
      12-11-2019, 07:29 PM   #104
jpy1980
Lieutenant Colonel
jpy1980's Avatar
United_States
1500
Rep
1,966
Posts

Drives: 2015 BMW M3 -Smurfy Blue Vinyl
Join Date: Sep 2018
Location: Los Angeles

iTrader: (2)

Just installed my CBC at European Auto Source! Kevin and the guys there are top notch!

I also ordered the VTT full crank hub solution for BF (half off baby!) directly from Vargas, but they said that they had over 100 orders so it was gonna take awhile to ship out. So I just bought another CBC at EAS and will probably sell my new CBC when I get it.
Appreciate 1
tom @ eas4954.50
      12-11-2019, 08:59 PM   #105
X.X.I.V
Lieutenant
X.X.I.V's Avatar
United_States
68
Rep
436
Posts

Drives: 16 F80
Join Date: Sep 2009
Location: Glenview, IL

iTrader: (0)

Quote:
Originally Posted by jpy1980 View Post
Just installed my CBC at European Auto Source! Kevin and the guys there are top notch!

I also ordered the VTT full crank hub solution for BF (half off baby!) directly from Vargas, but they said that they had over 100 orders so it was gonna take awhile to ship out. So I just bought another CBC at EAS and will probably sell my new CBC when I get it.
I was one of those 100+ orders I heard from Tony the renaming pieces are coming in Later Tomorrow and shipping out the remain orders on Friday.
Very Excited
Appreciate 0
      12-11-2019, 09:55 PM   #106
jpy1980
Lieutenant Colonel
jpy1980's Avatar
United_States
1500
Rep
1,966
Posts

Drives: 2015 BMW M3 -Smurfy Blue Vinyl
Join Date: Sep 2018
Location: Los Angeles

iTrader: (2)

Quote:
Originally Posted by X.X.I.V View Post
I was one of those 100+ orders I heard from Tony the renaming pieces are coming in Later Tomorrow and shipping out the remain orders on Friday.
Very Excited
Nice!
Appreciate 0
      12-11-2019, 10:54 PM   #107
DanMpower
Lieutenant Colonel
DanMpower's Avatar
United_States
2277
Rep
1,701
Posts

Drives: White M3s
Join Date: Feb 2018
Location: Southern CA

iTrader: (20)

Quote:
Originally Posted by blockdoc View Post
I don't understand why folks don't do the whole solution....even the manufacturer does not recommend just the CBC? We spend thousands (tens of thousands some) on wheels and go fast mods but get stingy with this
I think most on here lease their cars so they would only spend money on things they can take off to sell when it comes time to turn the car in...

Real owners will give the F8x the love and protection it deserves.
Appreciate 1
      12-14-2019, 02:30 PM   #108
6SPD GOD
First Lieutenant
6SPD GOD's Avatar
United_States
83
Rep
325
Posts

Drives: 2016 M4 ZCP 6SP
Join Date: Mar 2017
Location: California

iTrader: (0)

Quote:
Originally Posted by RSXiMUS View Post
I think most on here lease their cars so they would only spend money on things they can take off to sell when it comes time to turn the car in...

Real owners will give the F8x the love and protection it deserves.
It's interesting to see no failures with just CBC. I've been researching through forums and other S55 groups, but I have not come across any "random" failures.

I'll be doing the CBC just for the "peace of mind". I encountered a couple people that suffered SCH after they did an E85 tune and upgraded tires to R888R.
Appreciate 1
      12-20-2019, 09:19 PM   #109
M-Pilot
Brigadier General
M-Pilot's Avatar
United_States
4709
Rep
3,674
Posts

Drives: 981 Cayman GTS
Join Date: Mar 2015
Location: CA

iTrader: (0)

I think this might be the first reported failure in the presence of CBC. Based on the thread, it had aftermarket turbos with a custom tune, VTT V1 spline lock hub with CBC:

https://f80.bimmerpost.com/forums/sh....php?t=1679594
Appreciate 1
      12-21-2019, 03:30 PM   #110
Chris@VargasTurboTech
BimmerPost Supporting Vendor
1722
Rep
1,486
Posts


Drives: All Things TurboCharged
Join Date: May 2016
Location: Bay Area

iTrader: (0)

Yep! Had a V1 used with a CBC slip. Slip occurred on the racetrack. Car is a DCT, was on a 100 octane tune and owner would have to check logs but guesstimates 30 psi when discussing on the phone (don't hold him/me to that number). Bill's case is the first reported one.

V2 is a much more aggressive way to go, which is why it's backed by the no-slip guarantee when installed by an authorized installer. Any questions or concerns shoot me an email and I'll be happy to help you out.

Chris
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 08:07 AM.




f80post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, 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