Reported SCH due to engine design flaw while using CBC?

[MisterF80M3]

Originally Posted by TopJimmy

Hubs have spun using just CBC. As long as the bolt was under torqued before the CBC was applied then the capture added no protection to overpowering the friction washer. The capture would still keep the bolt from moving any more than it had. If the capture is applied to a properly torqued bolt then you have protection against bolt movement but you can still "overpower" the friction washer with super heavy tunes (not sure exact HP/TQ).

Now to OP's question, a Stage 1 is unlikely to slip a hub, especially on a M car that's been driven 5 years (probably hard at some time). It's always a possibility... Its usually the guys running Stg2 E85 where hub slip can become an issue. With aftermarket turbos and or Meth even more so.

Link to SCH with CBC only? The only thing produced in this thread is spline lock + CBC had spun and it was later found that the spline lock was defective. Another car money shifted with a CBC and spun the hub.

[Smee]

So what your are saying is if there is no link then it can't of happened lol. Unbelievable.

I know of a car that spun with just a cbc... i know you won't see it online either. So I must be lying.

[Wanted_M]

Originally Posted by Smee

So what your are saying is if there is no link then it can't of happened lol. Unbelievable.
I know of a car that spun with just a cbc... i know you won't see it online either. So I must be lying.

No one here is calling you a liar but at least provide more info than you know of a car??
Was car stock, mods (stg1 or 2) or a brief comment on how it happened or did I miss that comment?

[MisterF80M3]

Originally Posted by Smee

So what your are saying is if there is no link then it can't of happened lol. Unbelievable.

I know of a car that spun with just a cbc... i know you won't see it online either. So I must be lying.

There is too much BS going around. "I heard from a friend of a friend" or "I don't know the details"

BTW, the $100 bounty from 1.5 years ago is still up for grabs. If you can provide evidence that someone spun their crank hub with a CBC only installed, you can get it.

[TopJimmy]

Originally Posted by MisterF80M3

Link to SCH with CBC only? The only thing produced in this thread is spline lock + CBC had spun and it was later found that the spline lock was defective. Another car money shifted with a CBC and spun the hub.

This guy claims a Spin with a CBC:
https://www.bimmerpost.com/forums/sh...php?p=25373128

[Wanted_M]

Originally Posted by TopJimmy

This guy claims a Spin with a CBC:
https://www.bimmerpost.com/forums/sh...php?p=25373128

Yeah but that was self inflicted, hurts to watch the video. At that rpm, good luck with anything surviving unless is a specialty built motor. You cant expect the motor to survive that do you?

[TopJimmy]

Originally Posted by Wanted_M

Yeah but that was self inflicted, hurts to watch the video. At that rpm, good luck with anything surviving unless is a specialty built motor. You cant expect the motor to survive that do you?

I don't expect to survive that one but it's a perfect example of how you can overpower the friction washer, even with a CBC over a properly torqued crank bolt. There's a guy on Ytube running over a thousand horse on his drag strip S55. I'm sure he could spin a washer with just a CBC on a hard drag launch. I'm just showing it's possible since I was asked to provide proof it could happen.

[MisterF80M3]

Originally Posted by TopJimmy

I don't expect to survive that one but it's a perfect example of how you can overpower the friction washer, even with a CBC over a properly torqued crank bolt. There's a guy on Ytube running over a thousand horse on his drag strip S55. I'm sure he could spin a washer with just a CBC on a hard drag launch. I'm just showing it's possible since I was asked to provide proof it could happen.

Someone mentioned in this thread that someone in Europe was pushing 800WHP with an upgraded turbo S55 with just a CBC. In Europe, they actually mainly use CBC only. Even Litchfield recommends using CBC.

[TopJimmy]

Yeah, but many Euro shops do the "extra quarter turn" method to reduce washer slip potential (but over stretching the bolt). I wanted to go this route, but why not do the pins if it's a 10 hour job anyway (including overtorque effort).

[deeldoo]

Add me to the list of CBC only.

2016 M4 DCT on just a cs tune, i can't justify spending 4k on a stock power level car.

[MisterF80M3]

Originally Posted by TopJimmy

Yeah, but many Euro shops do the "extra quarter turn" method to reduce washer slip potential (but over stretching the bolt). I wanted to go this route, but why not do the pins if it's a 10 hour job anyway (including overtorque effort).

My installer was able to get the CBC installed in under 2 hours. Pins would have cost 4x more and 8 hours.

[TopJimmy]

Originally Posted by MisterF80M3

My installer was able to get the CBC installed in under 2 hours. Pins would have cost 4x more and 8 hours.

The under 2 hours is CBC only.
I wanted an over-torque and then the CBC (the Euro solution). Locking the crank and doing the torque job adds a day. If I wasn't sure the bolt was torqued right then I wasn't going to get any confidence from the CBC only.

[Groganrocket]

Originally Posted by MisterF80M3

My installer was able to get the CBC installed in under 2 hours. Pins would have cost 4x more and 8 hours.

Wish I could get mine done under 2hrs the shop I’m going to probably going to milk it.

[ckendri]

Originally Posted by Groganrocket

Wish I could get mine done under 2hrs the shop I’m going to probably going to milk it.

2 hours would be pretty quick. I'm not an mechanic, but I've turned plenty of wrenches. I took my time, followed the guides from the forum, and it took 4-5 hours if I recall correctly. If you can find a shop that bills you for 4-5 hours, I think that would be fair. If they have done a lot of them, then maybe they could knock it out in 2-3. Working from memory makes it go a lot quicker, but also can let mistakes creep in.

[MisterF80M3]

Originally Posted by TopJimmy

The under 2 hours is CBC only.
I wanted an over-torque and then the CBC (the Euro solution). Locking the crank and doing the torque job adds a day. If I wasn't sure the bolt was torqued right then I wasn't going to get any confidence from the CBC only.

Seems a bit redundant, IMO.

Even Litchfield based in the UK does not over-torque.

Originally Posted by Groganrocket

Wish I could get mine done under 2hrs the shop I’m going to probably going to milk it.

Originally Posted by ckendri

2 hours would be pretty quick. I'm not an mechanic, but I've turned plenty of wrenches. I took my time, followed the guides from the forum, and it took 4-5 hours if I recall correctly. If you can find a shop that bills you for 4-5 hours, I think that would be fair. If they have done a lot of them, then maybe they could knock it out in 2-3. Working from memory makes it go a lot quicker, but also can let mistakes creep in.

I think I paid for 4 hours of labor but he got it done in 2 hours.

Pricing was extremely fair though, cheapest in the area that specializes on S55.

[SE7EN335]

I am getting the CBC installed soon in preparation for custom E85 tune by Cary Jordan. My mechanic is saying that he recommends replacement of the water pump, the drivebelt and the drive belt pullies whilst he is down there. Are those really necessary at my mileage? Im at 68K kms (42k miles)

[deeldoo]

Originally Posted by SE7EN335

I am getting the CBC installed soon in preparation for custom E85 tune by Cary Jordan. My mechanic is saying that he recommends replacement of the water pump, the drivebelt and the drive belt pullies whilst he is down there. Are those really necessary at my mileage? Im at 68K kms (42k miles)

No, my mechanics installed a cbc in 2 hours. It's not a "if i am down there" situation unless it is 6+ hours of labor imo.

[Wanted_M]

MisterF80, are you NorCal or SoCal? Shoot me over the contact.

[MisterF80M3]

Originally Posted by SE7EN335

I am getting the CBC installed soon in preparation for custom E85 tune by Cary Jordan. My mechanic is saying that he recommends replacement of the water pump, the drivebelt and the drive belt pullies whilst he is down there. Are those really necessary at my mileage? Im at 68K kms (42k miles)

Not necessary.

Originally Posted by Wanted_M

MisterF80, are you NorCal or SoCal? Shoot me over the contact.

Four B in Santa Clara. tanzm4_ recommended me.

[jason.404]

Originally Posted by MisterF80M3

Not necessary.



Four B in Santa Clara. tanzm4_ recommended me.

Can you dm me the service cost for the cbc? Looking to get mine done soon.

[Walmart Parking Lot]

Originally Posted by MisterF80M3

There is too much BS going around. "I heard from a friend of a friend" or "I don't know the details"

BTW, the $100 bounty from 1.5 years ago is still up for grabs. If you can provide evidence that someone spun their crank hub with a CBC only installed, you can get it.

VTT even said CBC is not a full solution to prevent the crank hub from spinning. Lmao

Just get a full crank hub solution with or without CBC and call it a day.

[deeldoo]

Originally Posted by Walmart Parking Lot

VTT even said CBC is not a full solution to prevent the crank hub from spinning. Lmao

Just get a full crank hub solution with or without CBC and call it a day.

Originally Posted by Walmart Parking Lot

VTT even said CBC is not a full solution to prevent the crank hub from spinning. Lmao

Just get a full crank hub solution with or without CBC and call it a day.

Why would vtt say otherwise lol?

So they could lose out on selling an item 7 times the price?

Lol don't listen to shops about what is and is not a full solution when not a single soul on this planet can explain the reason why the crank hub spins as well as the manner it does and why the solution is the correct one.