08-28-2019, 02:36 PM | #68 | ||
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08-28-2019, 06:09 PM | #69 | |||
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08-29-2019, 05:32 PM | #70 |
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I have one of the first M340ix cars with first gen software and can say it hangs with my F80 CS with no issues. I will not update the software. The car just pulls and pulls.
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2023 M340ix my Daily Driver
G83 M4CV, F80 M3 CS, E30 M3, Z8, other various BMW's Ferrari F8 Last edited by Frank_NJ; 08-29-2019 at 10:06 PM.. |
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09-03-2019, 09:31 PM | #71 |
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That’s why in Europe we use plug& play external mini ECU, you remove it before you go to service, will go back to standard settings, they can scan, no traces, they can update wherever.
You go home, reinstall it again in 5m and you are back in business. Since January this year that the M340i device is available, 425hp and 600Nm |
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10-10-2019, 09:21 AM | #75 |
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Subscribing for updates, will definitely do this as soon as its available!
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10-10-2019, 11:56 AM | #77 |
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10-15-2019, 08:13 AM | #78 |
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Has anyone actually done this tune yet? If so, did you go with the exhaust burble option? Curious to hear the difference between the stock burble and the option on the tune
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10-17-2019, 11:15 PM | #79 | |
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Here in the US, there is no emission standards at full throttle (85%+). This exception was made so car manufactures could deliver maximum power when it is needed the most and the overall effect on emissions would be small, since people rarely drive at full throttle. Thus, at high RPMs, the O2 sensors go into an "open loop" state and is taken out of the system so the fuel system can be enriched for maximum power, without the needed to abide by any federal emission standard, since it's exempt. It seems in the early M340i, the ECU mapping was programmed in error to place the O2 sensor in a "open loop" state at lower power band, instead where it belong, at WOT. This new software update places the power back in the higher RPM to meet allowed emission standards. So the addition power wasn't taken away, it was just move to higher band in the RPM. This aftermarket tune just brings back original lower end power band. |
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10-18-2019, 03:19 AM | #80 | ||
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1) Where did you learn of the info you shared regarding this power loop, emissions standards, etc, etc? I'd like to read more about that as it pertains to the m340i. 2) If what you're saying is true (no power lost, it was just moved to lower rpm ranges)....then, wouldn't Mission Performance's peak WHP #s from their dyno remain relatively the same from earlier model to late model....albeit at different rpms? Because on their dyno, their was a 50-60 WHP LOSS....that sounds like actual power being robbed. And by the way, I do understand that a car's performance is about the total area under the horsepower and torque curves, not just peak #s. However, a horsepower loss is a horsepower loss.....and it would be nice to truly get to the bottom of this. Thx again for sharing.... |
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10-18-2019, 11:08 AM | #81 | |||
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The second I heard some random tuner is claiming a major auto manufacture is taking away almost 50hp, I knew it was nonsense. Had it been true, it would be a front-page headlines by now. I just couldn't confirm it until I saw the official letter from BMW where it stated "this issue could cause emission to exceed the prescribed standard" that's when I figured out what they both meant because I understood how allowed emission standards are measured. You ever wonder how a ULEV N20 motor could legally roams the streets same as a gas-guzzling, dinosaur-burning V12 Lamborghini? It's because said manufacture has demonstrated to the EPA that their motor doesn't effect allowed emission standards given today's federal testing procedures. If it helps you sleep better at night believing that BMW took away your power and a tuner brought it back, that's fine. No disrespect to them but it's absolutely a false statement. It's just BMW original tune was ignoring the original set standards and now it was corrected and moved to a higher band in the RPM, where it's allowed. . http://www.autotap.com/techlibrary/u...en_sensors.asp |
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10-18-2019, 01:02 PM | #82 | ||||
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Regarding whether BMW "stole" horsepower back, or, just renormed the power due to the emmissions issue....that minutiae doesn't matter to me. What WOULD matter (if I were an m340i customer) is if I test drove a faster, earlier version....ordered a car based on that drive/feel, and then felt underwhelmed by a slower, less powerful vehicle when my order came in. |
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10-18-2019, 01:26 PM | #83 | |||||
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Unless I was standing there and saw it with my own four eyes, I would seriously doubt anything a tuner is claiming i.e. a guy with a laptop and dyno in what it looks to be someone's backyard, over a major manufacture, which has a lot more to lose by misstatements. I drove a brand new, fully-covered M340 loaner with the recent software update, for a full week and it certainly confirms that it has more power than the N55 in the lighter M2. The new M340i is rocket; it reminds me of my old tuned, FBO N54. The software update has nothing to do with a reduction of the overall power output or more than one source would be yapping about it. If you told me the power was reduced, there is not way I would believe it. So unless someone that's neutral could prove me wrong, I'll stick to my hypothesis and say the rated power BMW stated is still there, regardless of the recent software. |
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10-19-2019, 12:42 AM | #84 |
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I still don't understand where people are seeing this detune 50 hp dyno plot. I see a baseline and stages 1 and 1.5 aftermarket tune plots. No proof given for supposed detune by BMW. The actual aftermarket tune looks good from a delta perspective so not knocking that.
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10-19-2019, 07:00 PM | #86 |
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That's why the M340i doesn't feel much faster than my car with rated 355 HP. The recall letter seems to state this affects some 2016 cars but I never received such a letter so that means I'm not affected, or they just did the update during a regular service visit? Not sure if I notice a power difference. It seems Mission Performance is faster to develop flash tune than bootmod3 these days, not sure if the B58 flash they have can be used with the M340i with the higher flow HPFP.
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10-21-2019, 11:57 AM | #87 |
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10-22-2019, 12:39 AM | #88 |
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Mission Performance Tune
New to the forums and I just got my m340. If all I have is a VRSF downpipe should I select stage 1 or stage 2 when purchasing the tune. Im not sure if the stage 2 is going to require more hardware than the downpipe.
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