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      01-12-2022, 11:41 AM   #1
Gbcarmona
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Stock F80 - no power mods! Does it need crank hub fix!?

Hi everyone! I’m guessing this has been debated a lot before but want to just gather your opinions and hopefully also personal experiences on this issue please. Is it that common? I’m planning to keep my car standard, not even sure if it will ever see a track… I know that from reading the internet some people say it failed also on stock engines…but how common are these failures really if you maintain it stock and maybe don’t rag it like an idiot when it’s cold maybe? Car has one year warranty but I’m thinking is this something I want to do now, after the warranty expires or not at all even?
I have a friend who is a mechanic at BMW who tells me this is not an issue at all if the car stays stock. Thoughts? Thanks in advance.
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      01-12-2022, 11:51 AM   #2
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Quote:
Originally Posted by Gbcarmona View Post
I have a friend who is a mechanic at BMW who tells me this is not an issue at all if the car stays stock.
He's right.
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      01-12-2022, 11:52 AM   #3
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dude i am tuned and don't blink an eye for the crank hub fix. some of the preventive measures cost as much as the repair.
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      01-12-2022, 02:20 PM   #4
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Stock= no fix needed
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      01-12-2022, 03:08 PM   #5
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Your guess is right… this has been debated before. You WILL NOT find an definitive answer here nor anywhere else you search.
People will say both so in the end, do what makes sense for you. Unless BMW sends out a campaign, you’re on your own.
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      01-12-2022, 03:50 PM   #6
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Think about it like this: Car accidents happen, does that mean we should stop driving? No. taking care on the road should help.
In the same way, if you treat your car with some respect, the crank-hub MAY only be rumour.
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      01-12-2022, 09:40 PM   #7
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There are BMWs to worry about in regards to reliability.

The F8x are not one of them. In over four years of ownership over three models, the only issue I've experienced is a leaking diff seal fixed under warranty (which certainly could have been due to slamming the car in the first place).

More enjoyment of the car, less worry.
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      01-12-2022, 10:59 PM   #8
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If you see what's involved in the labor one can argue the amount of risk for things to go wrong almost seems higher than the CH failure itself. But that's just me.
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      01-13-2022, 08:54 AM   #9
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3 to 5k for crank hub fix! Tune it mild to moderately no fix , but if you want to push 600hp and more then get it done!
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      01-13-2022, 03:18 PM   #10
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Agree with the common theme here. While it's possible, very unlikely if you remain at stock power levels.
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      01-13-2022, 03:45 PM   #11
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Thanks guys. I think I will keep it stock…car came with 1year warranty for now but I’m sure I’ll keep it stock anyway…it has plenty of power anyway!
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      01-14-2022, 12:25 AM   #12
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My n54 spun a hub on a stock motor and tune, no upgrades. I've done about 10k on my m4 with bolt ons and no issues. Just how you drive it and luck of the draw when we're talking stock levels. I would recommend as part of a rebuild when you start pushing beyond stock turbo limitations.
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      01-14-2022, 02:14 AM   #13
Gbcarmona
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Quote:
Originally Posted by Nicks_M3 View Post
My n54 spun a hub on a stock motor and tune, no upgrades. I've done about 10k on my m4 with bolt ons and no issues. Just how you drive it and luck of the draw when we're talking stock levels. I would recommend as part of a rebuild when you start pushing beyond stock turbo limitations.
Thanks for sharing! I’m keeping mine stock since it has plenty of power…really don’t see the need for more…at 2500 rpm the car is already at 90mph…and I already have too many points! Lol
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      01-14-2022, 09:00 AM   #14
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For piece of mind I got the crank bolt capture installed. $100 part and $250 labor to install. Haven’t seen too many posts about spinning with a CBC at stock or stage 1 levels. Just added piece of mind for me that maybe it does help so I run stage 1 tune all year no worries.
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      01-14-2022, 10:23 AM   #15
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Most people who spun the crankhub is repairable. The repair is like 5-6K or something. Why put 5-6k in it now if it's not broken? lol Unless you want to weigh the odds and hope you're not that one in a million and destroy the engine lol.
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      01-14-2022, 10:43 AM   #16
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I’ve only driven the car for 400miles but I still don’t understand why would someone want even more power on it…the power is already hard to put down, still spins in 4th!? Although the roads are usually very moist in the north of England! Stock is more than fine!
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      01-14-2022, 11:13 AM   #17
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Quote:
Originally Posted by Gbcarmona View Post
I've only driven the car for 400miles but I still don't understand why would someone want even more power on it…the power is already hard to put down, still spins in 4th!? Although the roads are usually very moist in the north of England! Stock is more than fine!
Hp is like a drug. The more doses you take the more you want to bump it up. You'll eventually look into turbo upgrades because a stage 2 550 wheel hp isn't enough.
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      01-14-2022, 11:59 AM   #18
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Quote:
Originally Posted by Gbcarmona View Post
I’ve only driven the car for 400miles but I still don’t understand why would someone want even more power on it…the power is already hard to put down, still spins in 4th!? Although the roads are usually very moist in the north of England! Stock is more than fine!
Suspension is this car's primary weakness IMO. If you are willing to source a base sway bar and springs, then try out the CS suspension tune - much better damping. GTS/CS diff tuning are also a great improvement, noticeably less wheel spin when putting power to the ground
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      01-14-2022, 01:29 PM   #19
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Quote:
Originally Posted by RugbyBro View Post
Suspension is this car's primary weakness IMO. If you are willing to source a base sway bar and springs, then try out the CS suspension tune - much better damping. GTS/CS diff tuning are also a great improvement, noticeably less wheel spin when putting power to the ground
This is interesting…I wouldn’t mind trying that if it smoothens the power delivery and torque curve? Is the common knowledge that it does that?
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      01-14-2022, 01:38 PM   #20
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Quote:
Originally Posted by Gbcarmona View Post
This is interesting…I wouldn’t mind trying that if it smoothens the power delivery and torque curve? Is the common knowledge that it does that?
Neither of those mods/flashes will change the torque curve or engine response, rather they will improve contact with the road and help with applying the power in lateral throttle situations. The effect may come across as smoother in the sense that you've got more confidence. If you want to keep OE suspension components post-warranty, then CS suspension is the way to go IMO.
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      01-14-2022, 04:13 PM   #21
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It seems that the Crunk Hub is the only reasonable option ... the CBC itself does not do much, however ... this assumption is probably the Plecabo effect


in this video, this guy explains what's going on

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      01-14-2022, 04:38 PM   #22
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Quote:
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It seems that the Crunk Hub is the only reasonable option ... the CBC itself does not do much, however ... this assumption is probably the Plecabo effect


in this video, this guy explains what's going on

I have yet to hear of anyone's pulley loosening and falling off over time
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