[Anvay]

I have a 2021 M340i and tbh I know like the basic stuff about tunes and everything but I don't know much.

I see that the f30 BM3 and mhd have a stage 2+ tune but the g20 doesn't, anyone know why that is?

I was also wondering which off-the-shelf tune is going to offer more performance, MHD or BM3? Or which one is just better overall since I care a lot about reliability too. Idk how to compare the 2 myself since idk that much about tuning cars overall.

I'd appreciate any help from anyone that's done this before or knows about this.

[mwinemil]

I can't speak to actual experience with the differences in these tunes, but I think you'll find that most would select BM3 over MHD. But what I can tell you is, if you want either of them you'll get to send your DME to Findland before it can happen.

[abbike18]

Can't speak to the unlock of your DME. On my B58 I've run both platforms with their OTS tunes extensively.

My takeaways:
-The web interface of BM3 is nice, with all logs available. However once you get used to MHD and sending the logs to data zap it's not a big deal.
-MHD allows you to set the coolant target for the engine and intercooler separately, where BM3 has less adjustability.
-MHD tunes focus more on timing, less on boost. They tend to deliver less at lower RPMs and more at higher RPMs.
-BM3 pretty much pushes the turbo to the max they can at all RPMs, so you get more low down torque.
-Overall power is about the same.
-BM3 has a nice throttle sensitivity feature and boost limiter. I liked both of these, and MHD does not have them.
-MHD does have the ability to simply reduce map power by X%, and it seems to use a combo of boost/timing to do so.

You'll be pretty happy with either honestly.

[GD1981]

Should be mentioned that bm3 has released customROM tuning for the B58. This imo makes it a much better option than mhd if you want to go outside of ots tuning.

https://bootmod3.atlassian.net/wiki/...BMW+S55+Engine

[cyam]

I know I am jumping in here, but how can I confirm/know if my car is DME locked?
I have a (February) 2020 M340i, but it was updated at the factory in January 2023 so I am guessing it has the latest software. I guess I could ask the dealer.

[xnick101]

BM3 seems to be the more popular option people choose after a femto unlock currently.

[MTWO]

BM3 also just revamped the app and its 🔥

[MichaelNRW]

Originally Posted by cyam

I know I am jumping in here, but how can I confirm/know if my car is DME locked?
I have a (February) 2020 M340i, but it was updated at the factory in January 2023 so I am guessing it has the latest software. I guess I could ask the dealer.

Download the MHD app for free, connect it to your car and do the unlock check.
The app will tell you what kind of unlock is needed.

[Nembus]

Originally Posted by MichaelNRW

Download the MHD app for free, connect it to your car and do the unlock check.
The app will tell you what kind of unlock is needed.

MHD can't actually detect if it's unlocked, it says so in the app. I'll take a screenshot and post it

[MichaelNRW]

Originally Posted by Nembus

MHD can't actually detect if it's unlocked, it says so in the app. I'll take a screenshot and post it

MHD can detect an unlock, at least the FEMto unlock.
And MHD will tell you if you need a normal unlock or FEMto unlock.

[mike@x-ph.com]

bootmod3.

The main reason for that is the support and knowledge of the product.

bootmod3 are the tuners and the programmers. They create the bm3 maps and the software.

MHD are not tuners; they buy their maps from third-party tuners. in my opinion, it creates a problem with support, given their limited tuning knowledge.

It also creates a conflict of interest with the third-party tuners as they want to sell you a custom map, if they make the best possible map for MHD then they won't have a custom map to sell.

[zhoustanley7]

Will 2021+ owners eventually be able to use OTS tunes without sending out dme overseas?

[MichaelNRW]

Originally Posted by zhoustanley7

Will 2021+ owners eventually be able to use OTS tunes without sending out dme overseas?

Not really, because the Bosch MG1 made after 06/2020 is locked.
Currently only FEMto in Helsinki and Aulitzky Tuning in Germany can unlock these DMEs.
Maybe someone else will find a way in the future, who knows.

[baturbo]

I have used both; 2006 335i MHD stage 2; 2016 M2 MHD and BM3; 2020 M340i MHD stage 2.

I can not recommend MHD highly enough. I have not used BM3s new app or on used them on my M340i.

Both will get you what you want, both have pros and cons, it really doesn't matter. I love MHD because its supper easy to use and their maps are better (subjective opinion, for those how cant spot them).

If you do go MHD, set up an email address just for it (and any other tunning software you get, e.g. XHP etc) this way you can transfer them with the car, if you sell.

[b58.fazil]

If you just want an OTS and set it and forget type of thing then definitely go with MHD.

Their maps are more aggressive and worked on. Their OTS maps for the Gen2 B58s were developed by Fabian from PureBoost and John from CES Motorsports so they are indeed very good and reliable in that matter.

However if you want a custom maps and custom features like anti-lag, flex fuel, map switching etc etc go with BM3 as their platform supports this and MHD doesnt at the moment.

[MTWO]

Judging things based on OTS Maps is poor judgement. They can always add more free OTS maps. Having said that, I’m yet to see ever an MHD OTS car be faster or put down more power than a BM3 OTS car, mod for mod same octane and I’ve been around long enough and know people who have run and raced both.

[bimmerstar]

Originally Posted by mike@x-ph.com

bootmod3.

The main reason for that is the support and knowledge of the product.

bootmod3 are the tuners and the programmers. They create the bm3 maps and the software.

MHD are not tuners; they buy their maps from third-party tuners. in my opinion, it creates a problem with support, given their limited tuning knowledge.

It also creates a conflict of interest with the third-party tuners as they want to sell you a custom map, if they make the best possible map for MHD then they won't have a custom map to sell.

This is not true. Bootmod3 and MHD both use 3rd Party tuners for thier OTS maps. Bootmod3 uses HC performance for thier ots maps and MHD uses pureboost.

[mike@x-ph.com]

Originally Posted by bimmerstar

This is not true. Bootmod3 and MHD both use 3rd Party tuners for thier OTS maps. Bootmod3 uses HC performance for thier ots maps and MHD uses pureboost.

MHD does not only use Pureboost. They use different tuners. For example, on the N54, they used wedge.

HC is a part of the bm3 team; he not an utterly independent tuner like wedge or pure boost is to MHD.

Also, BM3 team are all tuners; Dzenno the owner, was the leading Cobb custom tuner back in the N54, and N55 days. They have been tuning experts for a long time

As far as I know, the MHD team has no tuning experience. They are mostly software engineers.

[bimmerstar]

Originally Posted by mike@x-ph.com

MHD does not only use Pureboost. They use different tuners. For example, on the N54, they used wedge.

HC is a part of the bm3 team; he not an utterly independent tuner like wedge or pure boost is to MHD.

Also, BM3 team are all tuners; Dzenno the owner, was the leading Cobb custom tuner back in the N54, and N55 days. They have been tuning experts for a long time

As far as I know, the MHD team has no tuning experience. They are mostly software engineers.

i was only speaking to the g20 since we are in g20 forum. im sure over the years the ots tuners could have changed for each company.

not saying all are not experts but i do question who BM3 has on thier customer service end. when you file a ticket for tune support it doesn't seem like whoever answers knows what they are talking about.

I run Bootmod3 by the way.
Just an example, bootmod3 claims to have removed the TCU limit, but after logging and dragying the car, I am not sure if I believe it. and when you contact for support they do not give a direct answer.

I have not bought XHP yet, but if all of a sudden my times are better with the TCU tune, then Bootmod3 has severely overlooked the TCU limits for M340 G20. My buddy and I have identical cars, his tuned with Bootmod3, and mine is currently stock. Up top we are almost neck and neck. down low, his car smokes mine. So obviously the tune does something but questionable about the tcu limits.

[mike@x-ph.com]

Originally Posted by bimmerstar

i was only speaking to the g20 since we are in g20 forum. im sure over the years the ots tuners could have changed for each company.

not saying all are not experts but i do question who BM3 has on thier customer service end. when you file a ticket for tune support it doesn't seem like whoever answers knows what they are talking about.

I run Bootmod3 by the way.
Just an example, bootmod3 claims to have removed the TCU limit, but after logging and dragying the car, I am not sure if I believe it. and when you contact for support they do not give a direct answer.

I have not bought XHP yet, but if all of a sudden my times are better with the TCU tune, then Bootmod3 has severely overlooked the TCU limits for M340 G20. My buddy and I have identical cars, his tuned with Bootmod3, and mine is currently stock. Up top we are almost neck and neck. down low, his car smokes mine. So obviously the tune does something but questionable about the tcu limits.

you are talking about a specific example, I cannot comment on your specific case since I don't have all the details.

But yes, I don't expect every employee in the company to be a tuning expert, but in that office, there is a team of tuners that can help if the issue is escalated.

With MHD, as far as I know, you don't get that. Since they did not create the map in-house and they are not tuners, tuning tickets are handled by a third party (the actual tuner).

[RigRag93]

I was so excited to check my DME date the other day with the MHD and I was off by just a few months... 2019.7.11 :/

[dustwhyn]

For what it’s worth, I have a bench unlocked 2020 M340i. I’ve extensively tested both bm3 and MHD OTS maps on my car. As far as ease of use and simplicity goes, I prefer MHD. The only real downside that I see with MHD is the inability to resell and transfer your license down the road, should you ever desire to do so. The MHD OTS maps from PureBoost definitely feel smoother to me than the bm3 ones as well, but as others have mentioned, you’re going to end up with a bit less power because PureBoost isn’t going to give you the most power they can off-the-shelf because it would interfere with their main business. The bm3 maps are definitely stronger down low, and I enjoy that, but they have given me a weird power cut, limp mode-esque issue that occurs from time to time but does not present any DME or TCU codes at all. I’m currently working with Halim Cazimi in attempt to figure out the cause and solution, which I believe is caused by something that may have been changed in the torque management strategy of my ROM, because while I do have a 2019 ECU, I have the latest ROM version. As far as customer support goes, the bm3 crew has been second to none. They’re always helpful and they reply in a timely manner, sometimes multiple times a day. However, I’ve noticed as of recently that their social media guys tend to bury and hide anything negative that anyone may have to say about any of their software or products. I encountered quite a few issues with their new WiFi adapter and the iOS version of their redesigned app. I left a comment on their release post to try to bring attention to it, and it was promptly deleted. I posted it once more and again it was deleted. I posted a third comment calling them out for deleting not only my comments, but comments of other people reporting issues with the new app, and some saying that they missed the old app. This comment, too, was deleted promptly. Kinda left a little bit of a bad taste in my mouth, but that’s just the social media side of things. The MHD guys on the other hand, usually give you the cold shoulder when you encounter any issues, and it will likely take some pestering to get them to look into and address any issues that you may have, UNLESS your tuner happens to be close to them. David Shoup quite literally has them on speed dial, so he tends to get issues fixed within a day or two. YMMV of course, but MHD has been rock solid on my car. Never had a single issue. However, I’m confident that once Halim and I sort out the issues with my ROM and their new app and hardware get through the growing pains, bm3 will be solid as well, and they’re set to release CustomROM for the latest gen 2 ROMs soon (It’s been available for older ROMs for a while now), where as MHD+ for any gen 2 ROM is still not even on the horizon as far as the public is concerned. If you want a simple set-it-and-forget it option, I would go with MHD, but if you’re looking for more features and plan on trying to maximize the power output of your setup, I would buy into the bm3 ecosystem. Hope this helps anyone who may be on the fence about either of these options!