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      11-04-2019, 06:02 AM   #89
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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
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      11-04-2019, 07:30 AM   #90
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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.
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      11-04-2019, 12:49 PM   #91
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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.
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      11-04-2019, 12:50 PM   #92
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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.
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      11-04-2019, 12:55 PM   #93
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Originally Posted by tom @ eas View Post
Absolutely it would. The crank hub still slipped.
Driver error involved, not a design flaw.
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      11-04-2019, 02:13 PM   #94
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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?
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      11-04-2019, 03:17 PM   #95
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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.
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      11-04-2019, 07:11 PM   #96
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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.
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      11-05-2019, 04:04 PM   #97
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I'm ok with this scenario as the first CBC "failure" 😏
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      11-05-2019, 08:45 PM   #98
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Money shifting is always a sad day.
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      11-05-2019, 08:45 PM   #99
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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.
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      11-06-2019, 05:40 AM   #100
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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.
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      11-06-2019, 10:36 AM   #101
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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.
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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 😉
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      11-06-2019, 12:01 PM   #102
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I see that the title has been revised! Nice!
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      11-06-2019, 03:19 PM   #103
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Originally Posted by jpy1980 View Post
I see that the title has been revised! Nice!
Fine tuning my friend!
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      12-11-2019, 07:29 PM   #104
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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.
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      12-11-2019, 08:59 PM   #105
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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
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      12-11-2019, 09:55 PM   #106
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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!
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      12-11-2019, 10:54 PM   #107
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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.
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      12-14-2019, 02:30 PM   #108
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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.
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      12-20-2019, 09:19 PM   #109
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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
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      12-21-2019, 03:30 PM   #110
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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
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