06-01-2019, 01:29 AM | #68 | |
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Why don't/didn't they race them? I guess I was just being hopeful that they'd have a solution for anyone that goes through this. I mean they do run those N55s. We may never know the root cause Call them first thing tomorrow morning OP. Best of Luck! |
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06-01-2019, 01:53 AM | #69 | |
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The bottom line is that the N55 basically never spins stock and the S55 does. Saying the M235i and M2 are susceptible to this just like the S55 is disingenuous given the number of N55s produced. The semantics don’t matter, the truth is S55 can spin it stock. When it spins stock it seems to do it early in the life of the engine and DCT is a risk factor. Anyone looking at M2C should note this and buy one anyway. |
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06-01-2019, 01:58 AM | #70 | |
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N55 will probably end up with failure related to bearings and oil starvation in the hands of a race team. |
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06-01-2019, 05:28 AM | #71 | ||
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So true.. Since I known of BMW, they were always recognized for making sporty, luxury vehicles but reliability has never been their strong suit, in comparison to Toyota.. Toyota's reliability is so renown that they named their spin-off vehicle 'Scion' meaning descendant of royalty, as a marketing term to connect it to Toyota's dependability. What confuses me is why an auto manufacture like BMW, after so many years of experience, can't build a powerful and reliable motor as Toyota. I guess that's a question only BMW engineers could answer As far is the crank issue goes, it seems like a design flaw, in which the engineer's oversight did not accurately account for "X" in relation to the potential higher power output of the S55.. |
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06-01-2019, 06:41 AM | #72 | |
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I mean if BMW is having a very small set of failures in a controlled engine building environment. I could imagine a failure from a shop installed bolt. A keyed hub won't help if the bolt backs out. |
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06-01-2019, 06:44 AM | #73 | |||
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06-01-2019, 06:55 AM | #74 | ||||
Luxury at the redline :)
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06-01-2019, 07:28 AM | #75 | |||||
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06-01-2019, 07:39 AM | #76 | ||||||
Luxury at the redline :)
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Check this out: |
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06-01-2019, 08:01 AM | #77 | |
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https://www.bmw-motorsport.com/en/to...mw-m4-gt4.html Edit, new footage: Cheers Robin |
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06-01-2019, 08:26 AM | #78 | ||
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And does BMW race these cars or are they customer only? I could be wrong, but it's not like this would be the first time BMW has fixed a production issue in its race car variant. I honestly forgot this car existed.
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Current Car: 2018 F80 M3CS, SMB, DCT, ZEC, MPE Recently Departed: 2020 F87 M2C, LBB, ZEC, 6MT (Euro Delivery Aug. 29, 2019, totaled by an idiot in a Camry who then ran from the scene) Wife's Prior Car: 2018 F80 M3, Yas Marina Blue, DCT, Black 19s, Carbon Structure Anthracite Cloth/Leather Combination, Driving Assistance Package (Euro Delivery Oct. 9, 2017) |
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06-01-2019, 08:33 AM | #79 | |
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https://www.bmw-motorsport.com/conte...7626520231.pdf Scroll down to the middle of the PDF: ENGINE states S55.... Cheers Robin |
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06-01-2019, 08:36 AM | #80 | ||
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Marketing is just that..... marketing. Like I said, it's not like this would be the first time BMW has fixed a production issue in its race car variant.
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Current Car: 2018 F80 M3CS, SMB, DCT, ZEC, MPE Recently Departed: 2020 F87 M2C, LBB, ZEC, 6MT (Euro Delivery Aug. 29, 2019, totaled by an idiot in a Camry who then ran from the scene) Wife's Prior Car: 2018 F80 M3, Yas Marina Blue, DCT, Black 19s, Carbon Structure Anthracite Cloth/Leather Combination, Driving Assistance Package (Euro Delivery Oct. 9, 2017) |
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06-01-2019, 09:30 AM | #81 | |
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They race those cars overhere. https://bmw-renova.nl/renova-motorsport Cheers Robin |
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06-01-2019, 09:38 AM | #82 | |
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06-01-2019, 09:52 AM | #83 | ||
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Also, just because it's called "S55" doesn't mean it's identical to the production engine and could have beefed up internals. It's cool man, large manufacturers don't cover up failures - I like that fantasy world. I'm just goin to let you have this one, because having to rewrite my point step by step again because you didn't read is just an enormous waste of time. In summary, race spec engines under a specific code are not identical to production spec engines of the same code.
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06-01-2019, 10:10 AM | #84 | |
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But whatever.... Cheers Robin |
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06-01-2019, 10:24 AM | #85 | |
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The aftermarket is now flooded with aftermarket crank hub options, as below.. But don't quote me on that.. |
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06-01-2019, 10:37 AM | #86 |
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M4 GT4 is a race car and has been used by several race teams around the world. It has the same S55 as the road car meaning same crank hub design. RealOEM has all details for all those who are interested:
https://www.realoem.com/bmw/enUS/sho...diagId=11_6976 Edit: Here's another link.. https://bimmercat.com/bmw/EN/search/...T4/USA/11_6976 |
06-01-2019, 12:30 PM | #87 | |
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https://www.bmw-motorsport.com/en/to...mw-m4-gt4.html I have talked to a couple different team mechanics at COTA, casually mentioned the crank hub issue. They didn't seem to think anything of it. One of them had never heard about it. They did rave about the car, said the drivers absolutely love it. |
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06-01-2019, 12:50 PM | #88 | |||
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The P65 was used in the GTLM/ALMS/Tudor racecars. DTM did use a P designated motor as well. The M3 GT4 on the other hand used an S65. Same 414hp output. GT4 regulations are much more regulated towards using street car components. The M4 GT4 is under the same regulations, using a S55. E92 M3 GT4 (S65) F82 M4 GT4 (S55) |
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