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Technical Topics B58 6-Cylinder Turbo Engine / Drivetrain / Exhaust Modifications Have there been many engine failures after tuning? Advice on best tune/parts

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      08-29-2020, 02:10 AM   #1
viperboy
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Have there been many engine failures after tuning? Advice on best tune/parts

Hi all, I’m new to the G20 platform, just picked up a 2020 M340 xDrive 2 days ago and it’s nice so far! My question is 2 part - the first of which is about picking the right tune and the second is inquiring about the failure rate of B58 engines with or without a tune.

I want to get a tune but I’m on the fence about which one to get. I was thinking about getting the Carbahn tune and paying the extra for the warranty. I also like that in my area there’s a dealer that has the tool in-house to flash the car without having to send the DME to Carbahn.

I have seen people mention MP since Alex was picked to tune one of Toyota’s Supra‘s, but I’ve also heard good things about BM3 and MHD. I’m not looking to set records, but I feel like the Carbahn tune is pretty conservative, relative to these other 3 tuners, so I’ve been thinking about getting something with more power and some customization around burbles. Most importantly, I want to make more power safely and reliably. I’ll probably do an intake and catted downpipe with the tune as well (points if you have the best part suggestions for that as well). What would you choose and why?

Secondly, I didn’t really see any threads about engine failures (with or without tunes), seems that’s very uncommon on this platform? I’m coming from the Audi world where engine failures are more common and there are tuners that tend to have more cars blow up, but I’ve really not seen that for this platform, however, I’m reading as much as I can and research everyday but I’d love to hear everyone’s thoughts.

Thanks!
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      08-30-2020, 12:09 PM   #2
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If there were, the last thing I would do is post about it on a public forum.
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      08-30-2020, 12:12 PM   #3
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Quote:
Originally Posted by greekcs View Post
If there were, the last thing I would do is post about it on a public forum.
That's you, I imagine most don't think that way and want to warn people about their experience with Tuner X so others are aware.
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      08-30-2020, 01:08 PM   #4
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You might want to post this question in the B58 subsection of the F30 forum - only because they have a 3 year jump start on B58 equipped cars vs the G20 and there is a lot of information to be found there :-)

Speaking from personal experience I ran the Mission Performance tune on my 2017 340 for about 25k miles and simply beat the hell out of that car at AutoX events and in the canyons - car never ever skipped a beat in any way, just kept asking for more. I have now transferred the tune to my M340 and much the same :-)
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      08-30-2020, 02:14 PM   #5
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B58 Engine: please post your experience, including problems / resolutions

https://f30.bimmerpost.com/forums/sh....php?t=1292652
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      08-31-2020, 09:45 AM   #6
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use a proven tune with the recommended map and you'll be fine
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      08-31-2020, 01:50 PM   #7
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First of all, congrats on getting your new M340i

I've ran about 10K miles so far with mixed Stage 1 and Stage 2 tune from MP and it hasn't skipped a beat. The only thing I'm constantly monitoring is the temp and making sure the car has enough time to cool off before I turn the ignition off after a hard run.

The only times I've got a warning on the car was for low fuel / tire pressure, which still scares the crap out of me with the chime sound.

I wish I could offer some more useful data to you with some warnings or issues I've had, but there is none to report at this time :P
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      09-03-2020, 06:38 AM   #8
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So far been running a custom aggressive stage 2 e50 tune through MHD have done over 200 pulls up to 180mph with 30 revisions car is running great 8k miles later
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      09-03-2020, 07:27 AM   #9
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Quote:
Originally Posted by Antec800 View Post
So far been running a custom aggressive stage 2 e50 tune through MHD have done over 200 pulls up to 180mph with 30 revisions car is running great 8k miles later
What time 60-130?
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      09-04-2020, 07:54 PM   #10
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is there a BM3 for the G20 M340i? I called SSR Performance and they told me there is no tune currently reliable on the this B58 platform.

After doing my research im clearly going to go with Alex over at Mission Performance with downpipe + BMS intake which i alrdy got from Mike over at XPH + AWE Exhaust then call it a day. Yes i did lease it but am i afraid? not at all. BMWs are strong platforms and these tuners like Alex put time in to do it right.

Its what you are looking out of the car utlimately.
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      09-05-2020, 08:09 PM   #11
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Quote:
Originally Posted by bSwiazzy View Post
is there a BM3 for the G20 M340i? I called SSR Performance and they told me there is no tune currently reliable on the this B58 platform.

After doing my research im clearly going to go with Alex over at Mission Performance with downpipe + BMS intake which i alrdy got from Mike over at XPH + AWE Exhaust then call it a day. Yes i did lease it but am i afraid? not at all. BMWs are strong platforms and these tuners like Alex put time in to do it right.

Its what you are looking out of the car utlimately.
That is going to be an amazingly potent and enjoyable combo! Looking forward to your feedback :-)
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      09-06-2020, 07:52 AM   #12
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Quote:
Originally Posted by bSwiazzy View Post
is there a BM3 for the G20 M340i? I called SSR Performance and they told me there is no tune currently reliable on the this B58 platform.

After doing my research im clearly going to go with Alex over at Mission Performance with downpipe + BMS intake which i alrdy got from Mike over at XPH + AWE Exhaust then call it a day. Yes i did lease it but am i afraid? not at all. BMWs are strong platforms and these tuners like Alex put time in to do it right.

Its what you are looking out of the car utlimately.
Mine is a lease as well and I’m very happy with my MP tune.
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      09-06-2020, 08:20 AM   #13
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Quote:
Originally Posted by Patgilm View Post
Quote:
Originally Posted by bSwiazzy View Post
is there a BM3 for the G20 M340i? I called SSR Performance and they told me there is no tune currently reliable on the this B58 platform.

After doing my research im clearly going to go with Alex over at Mission Performance with downpipe + BMS intake which i alrdy got from Mike over at XPH + AWE Exhaust then call it a day. Yes i did lease it but am i afraid? not at all. BMWs are strong platforms and these tuners like Alex put time in to do it right.

Its what you are looking out of the car utlimately.
Mine is a lease as well and I’m very happy with my MP tune.
Aren't you worried with the newest scans and updates that they will detect your tune and deny your lease return?
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      09-06-2020, 03:23 PM   #14
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No because there isn’t any actual proof of that happening besides 1 or 2 people saying it
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      09-06-2020, 08:30 PM   #15
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Quote:
Originally Posted by Antec800 View Post
No because there isn’t any actual proof of that happening besides 1 or 2 people saying it
I thought this was completely verified? There are screen shots of bmw software flagging cars now and capturing tune usage? I'm pretty sure this is a fact
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      09-06-2020, 08:52 PM   #16
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There's BMW technicians on the forums also supporting this claim
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      09-07-2020, 11:34 AM   #17
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There's BMW technicians on the forums also supporting this claim
Yep only reason I have not had it done yet
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      09-07-2020, 11:46 AM   #18
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Quote:
Originally Posted by Gdiddy23 View Post
There's BMW technicians on the forums also supporting this claim
Yeah that's what I thought too, you got to pay to play and BMW doesn't want to have lease returns that have been all tuned up, could mess with reliability factors etc and end up with a lot of warranty claims. The safest bet is a JB4 that is taken off when you go to service, I mean if the engine pops you will be on the hook as they will probably detect it's usage but for a lease return they may not go that far scan wise. This is just my opinion gathered from researching here and other forums.
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      09-07-2020, 04:47 PM   #19
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Quote:
Originally Posted by possible335i2008 View Post
Aren't you worried with the newest scans and updates that they will detect your tune and deny your lease return?
Hey no not at all bc when you do lease returns at bmw centers they dont scan your car when they do lease returns.

they only look at tires maintenance/dents and window cracks. i know a thing or 2 lol i dont work at bmw or anything
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