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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Interpreting MHD Datalogs



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      04-20-2017, 11:24 AM   #1
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Interpreting MHD Datalogs

I wrote the document below for my own benefit when I still had my 335 and I was trying to learn more about how the DME operates, how the MHD tune works and how to interpret the datalogs. I've moved on from the 335 platform but I thought this guide could be helpful to others.

This is simply a collection of notes, a very basic guide at most, it's not a comprehensive document. But it should help those new to MHD tunes and should hopefully cut down on the amount of repetitive questions being asked on the MHD General Discussion Thread (http://www.e90post.com/forums/showthread.php?t=1096247).

The point of this document is not to start a which tune is best battle either. I chose MHD for my own reasons and was very happy with my decision.

Martial (MHD Tuning) reviewed this document before I shared it and provided some input and corrections THANK YOU MARTIAL

So without further ado please see the link below:

http://docdro.id/IyQ24N5


If you guys notice any major issues or corrections that need to be made please let me know.
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      04-20-2017, 01:18 PM   #2
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Thanks! I will be flashing soon and hope to learn how to read the Data logs.
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      04-20-2017, 03:31 PM   #3
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Great Thread!

This is terrific. I've just started logging on my stock 08 335i and this is a big help.

Thanks again!!

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      04-20-2017, 09:06 PM   #4
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Nice summary, thanks for putting this together. Hopefully the peeps that are new to MHD or tuning in general will take the time to read and comprehend the concepts in the guide written by the OP.
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      04-20-2017, 09:08 PM   #5
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OP you are my hero
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      04-20-2017, 11:25 PM   #6
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Very informative! Thanks
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      04-21-2017, 11:27 AM   #7
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Can't wait to do some pulls this weekend and figure out what the logs actually mean. Thanks OP (and Martial).
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      04-21-2017, 12:04 PM   #8
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Only got a chance to quickly peruse the document, but it looks good dude; great work!

Definitely *sticky thread* material right here.
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      04-21-2017, 01:54 PM   #9
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I literally just said to myself this week i wish someone made this type of write up... thank you OP! Just making the switch over to MHD today/this weekend too
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      04-22-2017, 10:42 PM   #10
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thanks - good effort.
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      05-04-2017, 10:13 AM   #11
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Bump, don't want this thread to get buried is there a mod that could sticky it please.
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      06-09-2017, 12:48 PM   #12
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Please sticky this.
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      06-11-2017, 07:22 AM   #13
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Nicely summed up. +rep and rating.
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      06-11-2017, 03:52 PM   #14
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Awesome post!!

Would you be able to add min and max values for wgdc section and what % they relate to? May be helpful to the community.

Thanks!!
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      08-30-2017, 09:30 AM   #15
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Great write-up! Thanks for sharing.

I'm running a MHD Stage 0 v7 at the moment.
Planning for a FBO, but first want to make sure everything is healthy under the hood.

In every log I notice an closing throttle while my pedal is completely floored. Tracion control is off. I've read in your write up this should be minimized in V7. Is this normal behavior?

datazap.me
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      08-30-2017, 07:05 PM   #16
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Well, this is the thread you want - but I posted it there.
http://www.e90post.com/forums/showthread.php?t=1376386

But seems like theres something amiss with the datazap.me site now..
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