MHD question

Discussion in 'N54' started by ysjeon1698, Dec 28, 2016.

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  1. ysjeon1698

    ysjeon1698 Specialist

    I will move onto MHD from JB4. I heard people saying that I won't gain more power by having both of them. Anyway, please help me to understand MHD.

    Can anyone tell me what the stage 1, 2, and 3 is??
     
  2. ysjeon1698

    ysjeon1698 Specialist

    yikes what
     
  3. ysjeon1698

    ysjeon1698 Specialist

    Thanks, didnt see this post in the website.

    car is FBO, I guess I can go for stage 2 upgrade... thought it was going to be a lot cheaper ,,but with cables, tablet, license, and map... all going to be like 250~300..
     
  4. doublespaces

    doublespaces Administrator

    AZ
    2009 E93 335i
    It is cheaper just depending on if you have an android phone or not. But the stages and power are pretty straight forward. When you have everything setup you can fire up the app and look at the map options it gives descriptions for what you can purchase. As far as stacking tunes, unless you are running methanol or e85 you're probably better off letting the dme control things with a proper tune. You can ask @MHD for further details or confirmation.
     
  5. Abacus38

    Abacus38 Corporal

    198
    Tampa/Orlando, FL
    2007 Ti Ag 335i
    More power no but a smoother more consistent tune yes
     
  6. If you're FBO go for a custom tune with MHD instead of using their ots maps.
     
  7. ysjeon1698

    ysjeon1698 Specialist

    Thing is, mine is still at 40k miles and I want dealer to replace my turbo before time runs out. Will I be able to turn it back to stock and turn it back to custom map?
     
  8. klooney

    klooney Specialist

    Yes
     
  9. b1mmr

    b1mmr Corporal

    105
    Like he said, yes. You can back up your current map or have mhd load the most recent stock map for your car.
     
  10. b1mmr

    b1mmr Corporal

    105
  11. ysjeon1698

    ysjeon1698 Specialist

    Since I have DP, CP and FMIC, I should go for stage 2+, unless I want e40 tune right??
     
  12. klooney

    klooney Specialist

    Exactly. Make sure you log to ensure your car is happy with the tune.
     
  13. ysjeon1698

    ysjeon1698 Specialist

    Recently, my car kicked me to map 4 and i always get 30FF code... Shop told me i have no boost leak. do you know anything about this issue?
     
  14. frank

    frank New Member

    7
    BMW E88 135i
    Do you have a datalog? maybe we can see whats wrong with this log?!
    You can check the vacuum hoses, Pressure transducer, turbo solenoid and the connection to the FMIC.
     
  15. Andy

    Andy Specialist

    69
    California
    6466.
    MHD is good if you're only FBO running pump.
    I went with JB4 after I got upgraded turbos and JB4 had more fail safe options for me.
    This debate between JB4 and MHD have been going for long time already.
    It all comes down to personal preference really..
     
  16. Joe

    Joe Specialist

    30FF could be vacuum leak, boost leak, failing wastegates, jb4 being retarded or tweaked improperly. Datazap.me is your friend. Make an account, post logs in a separate thread dedicated to your issue.
     
  17. Joe

    Joe Specialist

    Stock ECU will always have more safety options than any stacked tune or piggyback module. Unless you have PI... that's another story altogether.

    There's really no debate. Jb4 is great for stock frame turbos and meth. MHD is great for all turbo setups now that boostbox is out. Jb4 has a few safety features added for PI but not nearly as many as it needs. If you think I'm wrong about jb4, search "jb4 overboost" on Google and read through all the threads where Terry more or less admits he can't do it properly so he tells people to just run a smaller wg spring. Yet, MOTIV is able to use their PID tuning to target less than wg spring and maintain it nearly perfectly.
     

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