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12-04-2018, 11:51 AM | #1 |
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▀▄ eas | VTT "SplineLock" CrankHub Installation Overview for S55
EAS is happy to announce that VTT is offering the only complete S55 crank hub solution that does NOT require the crank to be drilled for pins. VTT's uses their proprietary "SplineLock" technology that uses high tolerance machined splines which press into the crank, and positively lock the hub to the crank to prevent slippage. The splines are machined in such a way that rotational forces drive the hub, and splines deeper into the crank meaning when the hub encounters a situation that would normally slip a stock hub the splined hub is driven into the crank to keep it in place (much like a splined extractor). VTT has spent many months testing, and retesting this design, utilizing well over 10 different samples to come to their final production version. During testing, VTT's final hub managed to break their testing rig before slipping. These have been bench tested, and real-world tested on the VTT N54 race car spinning 8K RPM, and making well over 900whp. This technology means VTT's hub installs the same as a stock hub, no drilling of the crank, which means less labor is involved and is reversible is ever wanting to be uninstalled leaving no holes in the crank.
VTT SplineLock Crank hubs are CNC manufactured from Hardened 17-4SS for the ultimate in durability, and toughness. Note: This is an installation overview only to show a small summary of the installation process and in no way intended to be a full DIY. Installation should only be performed by an experienced BMW technician. Any modification to your engine will most likely effect factory warranty. The VTT "Spline Lock" Crank hub is a very involved and complex installation, which will require a good portion of the S55 being torn down to access the crank hub. Unfortunately, this is not an 8 hour job as previously claimed. However, labor is much less than keyway-based solutions. Spun Crank Hubs (SCH) are becoming an issue on S55s, failures have been reported on both modified and stock platforms. If you are modding, seeing regular track use or planning to keep your M3/M4 after your warranty expires, this solution (or any other that bonds the hub to the crank) is highly recommended. The VTT Spline Lock kit is a great way to affix the hub to the crank, rather than depending solely on the tension from the hub bolt to hold the hub/gears securely, which has proven to be unreliable in some cases. Installation time: ~20 hours. Special tools required. Vehicles covered 2015+ BMW F8X M3/M4, including CS/GTS 2018+ BMW F87 M2, including M2 Competition Products Required Vargas Turbo - SplineLock CrankHub Solution - BMW S55 Installation Overview Included pieces are a crank hub bolt, oil pump gear, timing gain guide, VTT "SplineLock" CrankHub Solution, Crank Bolt Capture, and hardware. Subject at hand, MY18 BMW M4 Competition. Heat exchanger, engine/valve cover removed, removing spark plugs Cam timing tool in position Crank dampener removed, showing crank hub and bolt Timing chain tensioner removal Removal of oil pump sprocket Crank hub bolt removal Disassembling VANOS unit, tools in place to remove timing chain as complete unit Overhead view of timing tools OEM Crank hub removal Comparison of OEM crank hub (left) and VTT "Spline Lock" CrankHub Solution (right) Alternate view of OEM crank hub (left) and VTT "Spline Lock" CrankHub Solution (right) VANOS solenoid (right) and timing chain tensioner (left), removed from vehicle Removing VANOS components Removing VANOS components, alternate Removing VANOS components, alternate Removing intake VANOS assembly VANOS components removed from vehicle - labeled to ensure proper reassembly Removing timing chain/guide, alternate Removal of timing chain assembly Timing chain components VANOS assembly removed, cam lock tool positioned in place Final view VTT "SplineLock" CrankHub Solution, before installing Installation of VTT "SplineLock" CrankHub Solution With new crank seal installed, VTT "SplineLock" Crank Hub is drawn into place Guide pin installed to mark TDC of crank Flywheel locking tool in place, preparing for final assembly Alternate view of guide pin through inspection mirror Reinstallation of VANOS components Installed VANOS units, cams locked into position and ready to final torque (TTY) Final torque of crank hub bolt, (TTY) Reinstalling crank dampener Final view of VTT Crank Bolt Capture before installing VTT Crank Bolt Capture installation, reinstall pulley bolts & torque Enjoy!
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12-04-2018, 12:06 PM | #2 |
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20 hours of labor???
This was supposed to be 10 hours or so as far as I remember What a disappointment to say the least I don't see this being as that much cheaper than current solutions out By the way great job EAS on the detailed installation overview |
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12-04-2018, 12:41 PM | #4 | |
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In comparison, it's a small price to pay for peace of mind.
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12-04-2018, 12:52 PM | #6 | |
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Last edited by PhaedeDPGH; 12-04-2018 at 12:59 PM.. |
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12-04-2018, 01:00 PM | #7 | |
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Installed Pure Stage 2+ turbos while under the hood, now that we don't have to worry about any SCHs. Cary is scheduled to tune later this week on our dyno.
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12-04-2018, 01:06 PM | #8 | |
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Could your tech feel it locking while installing it?
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12-04-2018, 01:15 PM | #9 |
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Good stuff, EAS!
With 20 hours of labor, it would make sense for the customer to consider the following upgrades as part of re-installation: VTT crank bolt capture NGK spark plugs New coilpacks (if around 30k miles on original set) Upgraded chargepipes hot and cold CSF heat exchanger CSF intercooler PI (optional) Turbo upgrade (optional) |
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12-04-2018, 02:59 PM | #10 |
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So it will cost over 3k. The part is around 800 and labor around 2500. I thought this suppose to be a cheap solution.
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12-04-2018, 03:16 PM | #11 | |
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To compare costs, both Akrapovic and MPE exhausts run for about $4-$5k installed, and neither provide the peace of mind for the more paranoid S55 folks. |
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///BMW Junkie473.50 tom @ eas8299.50 |
12-04-2018, 05:30 PM | #12 | |
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And then there are those who purchased on BF with no returns based on false info. Shame VTT cannot be truthful as it only adds to their on-going reputation. And shows why a respected source was wanted to verify VTT statements. Last edited by IK6SPEED; 12-04-2018 at 06:11 PM.. |
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12-04-2018, 06:05 PM | #13 | ||
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12-04-2018, 06:09 PM | #14 |
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12-04-2018, 06:13 PM | #15 |
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If I'm spending over $2k on a SCH fix labor I'm going with the existing proven solutions.
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12-04-2018, 06:23 PM | #16 | |
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12-04-2018, 06:24 PM | #17 | ||
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12-04-2018, 06:27 PM | #18 | |
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The VTT kit is very well made, solid fix and comes in at a lesser overall cost when labor is factored in - all wins. In fact, any kit that prevents a SCH from happening is fantastic.
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12-04-2018, 06:44 PM | #19 |
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It appears both Gintani and MaxPSI solutions will set you back at least $4K when it's all said and done. When I first heard news of the VTT solution and that it would cost half the price out of the door, I was pretty excited. Like I mentioned in my previous posts, I was a hesitant to believe though it would only require 6 to 8 hours for install. I couldn't understand why the solutions that required drilling would take that much more labor.
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12-04-2018, 06:52 PM | #20 | |
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12-04-2018, 07:00 PM | #21 |
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Correct. The drive sprocket for the cams is integrated into the new hub design.
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