10-15-2018, 07:57 AM | #23 | |
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The universal truth is that they COULD flag it. Doesn't mean they WILL flag it. For example, my Dinan tuned (flash) 135 went in with a transmission issue. They replaced my manual transmission under CPO warranty, no questions asked, and they knew I had tuned the car because they were the ones who installed it. In theory they could have put it on the tune and tried to make Dinan cover it, saying that the extra power is what was damaging the tranny, and I could have been stuck in a back-and-forth, but no - dealership just fixed it and didn't cost me a dime.
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10-15-2018, 08:14 AM | #24 | |
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I have a friend who went in with a M3CS transmission flash on his DCT M3 and it was auto flagged and now he's got no warranty on the tranny. Had nothing to do with the dealership, it was auto flagged by bmwag. Also dinan is factory warrantied (or at least has a matching factory warranty) so in your case it really wouldn't matter. If you had any other brand of tune or flash the outcome of that may have been very different.
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10-15-2018, 09:27 AM | #25 | |
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Again, my car was flashed at the dealership, so there's no way "BMW" doesn't know my car is tuned. Now maybe they just said that the transmission is separate from, and unrelated to an engine flash, so there is no conflict, but I have heard of some dealerships (illegally, but who can fight them) voiding a car's entire warranty even for unrelated systems (like voiding a warranty for an aftermarket exhaust, which is not legal in the US). So, I understand how the warranty voiding and flagging works in theory, but in my experience, it can be far less draconian than it is made out to be based on the dealership. YMMV, but I feel confident based on my case (a complete manual transmission replacement under warranty for a known tuned car) that there are workarounds. But if it is a serious concern, you should have a serious talk with your service manager before making modifications and get a "no BS" answer from them.
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10-15-2018, 09:43 PM | #26 |
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I think with the flash tunes you'd just flash back to stock before taking it in for service, apparently it is really fast. However if it blows up and they dig and find out it has had boost beyond the normal tune then you are screwed on the warranty.
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10-16-2018, 02:12 AM | #27 | |
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As always like you said, if you have the money to play then no big deal. |
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10-16-2018, 02:14 AM | #28 | |
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10-16-2018, 05:27 AM | #29 | |
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Some dealerships I've seen do hook-up and get auto-flagged (few months ago M got flagged, owner had jb4 and there were hidden/ghost codes) my buddy works there had no idea.
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10-16-2018, 08:36 AM | #30 | |
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10-16-2018, 09:54 AM | #31 |
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I have purchased multiple cars from this dealership and send people their way. It was just the right thing to "do" lol. Hell, this same dealership warrantied a popped RS motor 3 times before Ford sent engineers out to see WTF was going on. lol
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10-17-2018, 01:39 AM | #32 | |
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I've heard of some dealers not send FASTA data out by doing a "offline" read of the car. It's up to dealer to determine if they want to flag it or not. Obviously if FASTA data is read, or if a BMW regional engineer comes out to check your car for a large warranty repair and they find evidence of modifications you will be flagged and warranty work denyed. It's really a coin flip on the risk of having a tune and getting warranty work approved. Being instantly warranty flagged is different, if a dealer really hates you they WILL do it.
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10-18-2018, 01:59 AM | #33 |
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I'd have no trouble tuning this engine if there wasn't the spectre of a spun crank hub hanging over the S55. Gives me some pause because if BMW investigates, a tune is definitely a reason to deny warranty.
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10-18-2018, 02:44 AM | #34 |
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Fraction of a percent, if that. Completely over blown. Yet to this day meet someone in person who has had the problem. Even with the endless amounts of bmwcca meets and trackdays I have attended. Not just S55 powered cars, N55 uses the exact same crank hub parts. Everything is forum only. Absolutely nothing compared to rod bearing issues of S54, S65, S85.
Last edited by hellrotm; 10-18-2018 at 02:57 AM.. |
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10-18-2018, 05:18 AM | #35 | |
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Still, despite the fact that the crank hub part is the same, it's possible there are additional vibrations or harmonics that make it worse in S55. Not trying to overstate the risk, but it's non-zero. |
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10-18-2018, 03:36 PM | #36 |
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I'm wondering if any of the tuners will offer an ots CS tune BUT maintain the low end torque limitation on M2C S55... That could be an excellent combo for track use. I know the custom maps allow altering boost per gear but having the "BMW" CS tune coupled with the torque limit down low seems like a great combo.
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10-18-2018, 04:14 PM | #37 | |
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*** Boost/Torque by Gear (% Reduction) - New Map Configuration option - bootmod3 *** |
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10-18-2018, 04:26 PM | #38 |
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Also it looks like there is a new complete/permanent fix for the crank hub:
New Crank Hub Solution to Market https://f80.bimmerpost.com/forums/sh....php?t=1546386 Last edited by M-Pilot; 10-18-2018 at 05:11 PM.. |
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10-18-2018, 05:07 PM | #39 | |
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10-18-2018, 11:18 PM | #41 | |
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It does not cover if modified lol, FYI
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10-19-2018, 02:28 AM | #42 | |
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10-19-2018, 08:41 AM | #43 | |
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10-19-2018, 10:39 AM | #44 | |
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What is the difference between their stage 1 and an ots cs tune? (parameters not functionality) My ideal setup would be the cs tune coupled with the ability to manipulate torque delivery. Sounds like it's doable. |
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