07-11-2020, 04:11 PM | #1 |
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Recently installed the JB4 from Burger Tuning on my M340 (xdrive). Been running Map 1 & 2 for a few days. Initial thoughts on tune:
1. Super easy to install. I'm not much a DIY'er but with a couple YouTube videos it was a piece of cake. 2. Blue tooth adapter with iOS App = A+. Real time feed with the gauges is a very cool, and the ability to change maps and settings on the fly is impressive. 3. Power (even in Map 1) is serious. Instant power all through the bands; seamless shifting. 4. Ability to uninstall the tune when going in for a service; 👌🏽 Conclusion: If you're looking for a piggy back tune, this seems to be a great option. Very happy with the investment so far.
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07-11-2020, 10:30 PM | #3 | |
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07-12-2020, 09:55 AM | #4 | ||
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One of the options in the app display is ECU boost vs actual boost. This seems to be good way to compare vs stock in real-time.
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07-12-2020, 10:02 AM | #6 |
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Thanks. You won't be disappointed.
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07-12-2020, 03:12 PM | #7 |
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I called BMW last week to ask about flashing and different piggy back systems. Without me eluding about the JB4 they stated they see maybe 1 or 2 of them a year and can detect if a car has had a piggy back on it through the number of key cycles. I am not really educated in this but would like to know 100% if it can be detected because I would like to install the JB4 but don't want to risk warranty.
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07-12-2020, 03:20 PM | #8 | |
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That said - keep in mind a piggyback or flash (either one detected) does not simply cancel your warranty - here in the US your mods only cancel the portion of your warranty that covers parts you may have compromised by making changes Hope this helps a bit Last edited by chenry; 07-13-2020 at 11:03 AM.. Reason: typo |
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07-12-2020, 03:59 PM | #9 | |
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07-12-2020, 10:41 PM | #10 | |
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07-13-2020, 11:54 AM | #11 | |
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This helps a lot. Thank you. Question though.... What portion of the warranty would be compromised with installing a JB4 and/or a flash tune? |
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07-13-2020, 04:09 PM | #13 | |
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With a JB4 or any well designed piggyback the ECU is never aware it's making more boost, load, or torque than factory so all these peak values remain at factory levels. |
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07-13-2020, 04:20 PM | #14 | ||
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Map 1 & 2 with 93 octane have been flawless so far. As a daily driver, it's likely I won't be out of these two all that much.
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07-14-2020, 10:54 AM | #15 |
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Congrats OP
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07-14-2020, 10:58 AM | #16 | ||
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07-14-2020, 11:59 AM | #17 |
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No one is going to admit to warranty fraud in public but it's rare to find anyone who has ever been denied due to say a JB4 that was properly removed. Those who get flagged either have flash tunes or other mods like downpipes that are easily detected.
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07-14-2020, 12:00 PM | #18 | |
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07-14-2020, 10:08 PM | #19 |
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07-15-2020, 07:24 AM | #20 |
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The downpipe is directly connected to the turbo, it will 100% void your warranty as you are also tampering with an emissions device. What part of the warranty it will void can range from just the turbo to the whole power train.
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07-15-2020, 07:18 PM | #21 |
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Would getting quad tips welded onto the exhaust tips of the stock system void the exhaust system warranty? I figured because it was purely cosmetic it should be fine but haven't asked bmw to confirm.
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07-15-2020, 08:00 PM | #22 |
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It would void the exhaust itself, so if the welds rust and it somehow messes up the rest of the exhaust or muffler then that wouldn't be covered, typically YMMV.
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