VTT Crank Hub Info

Chris@VargasTurboTech · 08-23-2017, 11:08 AM

As the crank hub problems get more and more common, people need parts, since Tony is so familiar with these issues, he put together a parts list and also a legend of what motors share what parts. It's a bit of a hodge-podge, of what is shared between the platforms.

One thing to note is that after 2010. All the hub go to the 8 bolt hub, this continues all the way up to the new S55's. They do not use the same bolt, and some sprockets match while others do not.

Overall we would say it looks like BMW was trying to save money by sharing parts instead of coming up with a solution to fix the problem.

VTT can offer hope for all platforms. We are developing crank hub fix kits, and we will add these to our "Game Changer" line up to go with our Crank Bolt captures. For the average person the Crank bolt Capture is most likely enough. For other that want to push the boundaries, the full hub replacement, with the Crank Bolt Capture, may be the solution for you. We don't want to say it's pure genius, but it is a pretty nifty solution and I'll be excited to share more details soon. We'll keep you updated on that.

Turbod · 08-23-2017, 06:49 PM

Can you explain what the problem is that needs to be fixed? I am not familiar with the issue.

Chris@VargasTurboTech · 08-23-2017, 07:49 PM

Sure -in some situations with high power or specific situations the crank hub can slip. This most often causes the destruction of all the valves as they hit the pistons and it's a costly fix. We're working on a multi-tiered approach to solving this. The above info is just for those that have an active concern or an interest.

Chris

Manberg · 08-23-2017, 10:45 PM

^ Sounds like a bad day.

velociti · 08-23-2017, 11:11 PM

Thought this was an S55-specific issue? Haven't seen any N55 issues related to this, though maybe I missed it. Links to threads?

Chris@VargasTurboTech · 08-23-2017, 11:17 PM

Quote:

Originally Posted by velociti

Thought this was an S55-specific issue? Haven't seen any N55 issues related to this, though maybe I missed it. Links to threads?

The S55 is known for this, but that's partly because of the power it's making.

We've done it on the N54 several times, and you can find other people's experiences if you search.

N55 we just did it testing at about the 600 whp level. This doesn't mean that it'll necessarily happen at X whp or Y wtq, but that it CAN happen. We're designing a solution to stop it from happening for all of the motors.

Remember, it took the N54 quite a while to make "big" power and tuning maturity to be reached; they're still making big strides. N55 is far behind but it won't be forever, and once significantly higher power levels are unlocked on a more regular basis, we'll most likely see more issues.

Chris

JETmn · 08-24-2017, 10:26 AM

Nice, keep us informed of developments and more specifics if you can. Like others have said we haven't seen the issue on other N55's yet, but there are only a handful over 600whp on the forums.

Chris@VargasTurboTech · 08-31-2017, 10:05 AM

Original files updated!

After getting with our BMW rep, he said a lot of the parts have superceded so this is easier than ever.

Basically N55/S55 are identical, all parts numbers can be interchanged.

N54 has its own hub, and bolt, everything else is the same.

So all sprockets the same, all grip disks the same, sprocket clip is the same across all three platforms. Makes this pretty easy.

08-23-2017, 11:08 AM	#1
Chris@VargasTurboTech Lieutenant Colonel 1933 Rep 1,532 Posts Drives: All Things TurboCharged Join Date: May 2016 Location: Bay Area iTrader: (0)	VTT Crank Hub Info As the crank hub problems get more and more common, people need parts, since Tony is so familiar with these issues, he put together a parts list and also a legend of what motors share what parts. It's a bit of a hodge-podge, of what is shared between the platforms. One thing to note is that after 2010. All the hub go to the 8 bolt hub, this continues all the way up to the new S55's. They do not use the same bolt, and some sprockets match while others do not. Overall we would say it looks like BMW was trying to save money by sharing parts instead of coming up with a solution to fix the problem. VTT can offer hope for all platforms. We are developing crank hub fix kits, and we will add these to our "Game Changer" line up to go with our Crank Bolt captures. For the average person the Crank bolt Capture is most likely enough. For other that want to push the boundaries, the full hub replacement, with the Crank Bolt Capture, may be the solution for you. We don't want to say it's pure genius, but it is a pretty nifty solution and I'll be excited to share more details soon. We'll keep you updated on that. Attached Images Last edited by Chris@VargasTurboTech; 08-31-2017 at 10:05 AM..
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08-23-2017, 06:49 PM	#2
Turbod Major 396 Rep 1,210 Posts Drives: 2014 E84 X1 35i M Sport Join Date: Mar 2015 Location: Oregon iTrader: (0)	Can you explain what the problem is that needs to be fixed? I am not familiar with the issue. __________________ 2011 E92 335i \| 11.7@125 SOLD 2017 Camaro SS \| 12.7@114 SOLD 2019 Audi TT RS \| 10.5@130 SOLD 2020 F97 X3M \| 11.0@123 2023 G80 M3 xDrive
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08-23-2017, 07:49 PM	#3
Chris@VargasTurboTech Lieutenant Colonel 1933 Rep 1,532 Posts Drives: All Things TurboCharged Join Date: May 2016 Location: Bay Area iTrader: (0)	Sure -in some situations with high power or specific situations the crank hub can slip. This most often causes the destruction of all the valves as they hit the pistons and it's a costly fix. We're working on a multi-tiered approach to solving this. The above info is just for those that have an active concern or an interest. Chris
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08-23-2017, 10:45 PM	#4
Manberg Second Lieutenant 88 Rep 239 Posts Drives: 2011 e90 335i Join Date: Aug 2013 Location: SoCal iTrader: (0)	^ Sounds like a bad day. __________________ M-Sport, 6MT, PPK, JB4 ISO + Rev.3, VRSF 7'' FMIC, VRSF Catless DP, BMS Charge Pipe, MFactory LSD, Öhlins R&T, M3 Control Arms, Rogue 6MT Bushings, Remus Exhaust, Duke Dynamics CF Diffuser, Cyba Scoops, VMR VB3 19s, BMS Clucth Stop
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08-23-2017, 11:11 PM	#5
velociti First Lieutenant 182 Rep 322 Posts Drives: 2009 E90 M3 Join Date: Jun 2013 Location: PA iTrader: (1)	Thought this was an S55-specific issue? Haven't seen any N55 issues related to this, though maybe I missed it. Links to threads?
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08-24-2017, 10:26 AM	#7
JETmn Lieutenant Colonel 245 Rep 1,595 Posts Drives: 2011 335i xDrive Msport Join Date: Apr 2013 Location: Orlando iTrader: (0) Garage List 2011 335Xi [0.00]	Nice, keep us informed of developments and more specifics if you can. Like others have said we haven't seen the issue on other N55's yet, but there are only a handful over 600whp on the forums. __________________ 2011 335Xi 6AT - VRSF catless DP - VRSF 7" FMIC with turbo inlet pipe - VRSF chargepipe - Pure Stage 1 turbo - JB4 - E30 - xHP Stage 3 - Strongflex tension bushings - Whiteline RSFB - UUC rear swaybar
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08-31-2017, 10:05 AM	#8
Chris@VargasTurboTech Lieutenant Colonel 1933 Rep 1,532 Posts Drives: All Things TurboCharged Join Date: May 2016 Location: Bay Area iTrader: (0)	Original files updated! After getting with our BMW rep, he said a lot of the parts have superceded so this is easier than ever. Basically N55/S55 are identical, all parts numbers can be interchanged. N54 has its own hub, and bolt, everything else is the same. So all sprockets the same, all grip disks the same, sprocket clip is the same across all three platforms. Makes this pretty easy.
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