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12-09-2022, 09:54 AM | #1 |
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IND | MMR Performance BMW S55 / N55 One-Piece Crank Hub Upgrade Kit Options
Issues relating to the standard three-piece crank hub on the S55 & N55 engine are (unfortunately) widely known, but these are fully addressed with the installation of one of the MMR Performance one-piece billet Crank Hub Kits. The OE crank hub unit's friction plate are known to slip, causing the timing to alter enough that piston-to-valve contact can occur and, if not totally standard and within the warranty period, leaves owners with a very expensive repair bill! MMR has developed 2 versions of a Crank Hub Upgrade Kit:
The MMR Performance BMW S55 / N55 One-Piece Crank Hub Upgrade Kits may be viewed at the following links to our online store: With Capture Plate: https://ind-distribution.com/product...ub-upgrade-kit 4-Pin Keyed Kit: https://ind-distribution.com/product...rade-kit-4-pin Please contact IND by phone or email for more information or to place your order. 866.963.4520 | info@ind-distribution.com
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Last edited by IND-Distribution; 07-31-2023 at 11:58 AM.. |
06-11-2023, 03:25 PM | #2 |
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How does is this product as reliable as the one piece cranks that have pins? Please explain?
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07-31-2023, 11:47 AM | #3 |
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For high-hp cars (700hp+) MMR Performance now offers this uprated version of their popular Single-Piece Crank Hub, with a 4-Pin dowelled location that locks onto the end of the crankshaft.
This 4-pin version of our Single-Piece Crank Hub kit is simply the ultimate solution to preventing this problem before it happens on high horsepower & torque engines. Using the same CNC-machined one-piece crank hub, this version also comes with four aerospace-quality dowel pins that mechanically lock the hub to end of the crank itself, plus a brand new OE bolt. Installation of these dowels is certainly not a DIY job. But to make the job easier for the professionals, ensuring that the required crank modifications are made safely and accurately, the MMR kit also includes a full installation jig that includes a bolt-on drilling guide, a location bolt for this guide, plus an HSS rolled high speed Drill Bit. Together, the Single-Piece design combined with the 4-Pin location ensures that there is now no way that the friction plates can ever slip. With the new OE crank bolt tightened appropriately, this delivers a transformational improvement in reliability versus the OE version.
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