BMW N54 MHD JB4 BEF Flash! How To DIY!

In this video, I'll show you step by step on how to load on a JB4 backend flash via MHD! Come see!
Check Out My BMW N54 335i Setup ⬇️ :
JB4: burgertuning.c...
Burger Tuning Dual Cone Intakes (DCI):
burgertuning.c...
JB4 500HP Package!: burgertuning.c...
Burger Tuning Pedal Tuner: burgertuning.c...
Burger Tuning Wheel Spacers: burgertuning.c...
Digiland Android tablet: amzn.to/2taHMP0
OTG Cable: amzn.to/2sNshNl
Use code: "BMW Fanatic" for $4.99 off!!!! ⬇️⬇️code is case sensitive.
BimmerGeeks KDCAN Cable up to 50% faster during Flashing period / first 50% is DME preparation which is not being flashed: www.bimmergeek...
CTEK 4.3 Battery Charger: www.fcpeuro.co...
My BMW Fanatic Amazon Website! ⬇️👉🏻www.amazon.com...
BMW Fanatic Camera Setup ⬇️:
EVO GP Pro GoPro Stabilizer: amzn.to/2rwQS8r
Movo GoPro External Microphone: amzn.to/2pQT9il
GoPro Hero 3+: amzn.to/2nu73lA
SanDisk Extreme 64GB Micro Card: amzn.to/2nuogvl
GoPro Hero Head Band Mount: amzn.to/2ncvEht
GoPro Hero Window Mount: amzn.to/2mQFIvI
GoPro Tripod: amzn.to/2nu96pE
iPhone 7: amzn.to/2mQOucM
Don't forget to SUBSCRIBE here ⬇️👉🏻 / @bmwfanatic
LET'S CONNECT!! ⬇️
Instagram: / bmwfanatic_youtube
BMW Fanatic Facebook Page: m.facebook.com...
Thank you for watching! As always, please SUBSCRIBE to keep up on all of the new content, click the “Bell” logo to ensure you receive notifications, like and comment!
We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Music: Deaf Kev - Invincible (NCS Release) - music was provided by NCS for use

[@BMWFanatic]

CLICK HERE for my BMW Fanatic Amazon recommendations that I’ve tested on this channel! Thanks for the support! 👉🏻www.amazon.com/shop/bmwfanatic

[@rodneymanor2000]

dude thank you so much for posting this ive seriously had no clue how to do this

[@aren4431]

Wow you legit posted this video when I needed to flash my 335. Perfect timing lol. Got my Pure Stage 2 installed today

[@avielboev6468]

How's it run?

[@perrypaddy647]

Your video tutorial helped me alot! Very straightforward. I was able to flash my BEF using the same battery charger you have (CTEK 4.3 MUS) with no issues at all. Although I hear that it is recommended to use a charger with at least 6 amps or above, I did remove the electric fuel pump fuse in order to conserve voltage during the flash.

[@standeman32]

Perry Paddy so you install the JB4 first, then do the backend mhd flash? What if you want to flash xhp as well?

[@underwang]

Good god man. Thank you.. I bought a stage 2 turbo. With many isses. All repaired now. My son bought all the MHD stuff. 335Xi. tomorrow. Cannot wait!

[@SimplyCarThings]

So glad you made this tutorial! Especially since there was none on KZbin prior to your vid, it's gona come in so handy for friends and myself who eventually would like to BEF!

[@BMWFanatic]

Simply Car Things 😀👍🏻 awesome!

[@Mr.Enigmatik]

Very helpful thank you. I just bought my 2010 135i and I noticed in the glove box is that bimmer geeks plug. So I’m wondering if the car had been flashed before. It certainly feels stock. But it won’t be for long since I have parts on order now. I’ve been trying to find out how to do exactly this. Can’t wait.

[@miller330i]

Diy for front door locks replacement please! They fail a lot and they have been upgraded by BMW since 2006!

[@TT-ot1fd]

Nice video! Got the same setup. Can't wait to see u get that lpfp upgrade and run the ethanol bef.

[@BMWFanatic]

Trong T hell ya!

[@pranaysharma9251]

Yours is an great channel. You are one person driving sales for all these tuning companies. LOL. Congratulations. One humble request to you : Lot of guys enjoy tinkering with their cars. Some like me enjoy a great fast car but are too scared to break things so no tinkering. In your videos, there are lot of jargon which simpletons like me don't get. How about a video which brings people like us to speed. I will give example : JB4 tune / difference between JB4 stock and different map / MHD / Backend flash / BEF... Seems there are different ways of modifying cars. What separates JB4 from COBB tuning is still not clear. Thanks

[@BMWFanatic]

Pranay Sharma I already have that video on my channel 😀

[@Bmwinsta]

Any knowledge on trying the back end flash and setting transport mode in the car when done? Have tried 3 different files all did the same thing

[@bennyang8049]

Are there any rubber hoses from the gas tank, to the LPFP, to HPFP, to the injectors that could be eaten by ethanol in the gas?

[@Gendo3s2k]

Why would I want to run both MHD and JB4? Aren't they both essentially the same thing?

[@TheCarBro]

Gendo3s2k MHD is the tune itself no safety protocols or monitoring for the engine, computers, sensors. Jb4 takes care of that, so your car will run smoother and safer

[@dylancrusan5537]

Hey! What boost are you reaching after having the BEF? Are you making more boost than you were before on Map 5? Thanks!

[@RaysGoodEats]

Love the videos man! You inspired me to do the BEF on my e90, feels alot more smooth and predictable now. One thing I noticed is that auto clear is not working anymore and I have a constant SES light now, when I pull the codes it's just o2 sensor codes for my catless DPs, do you know what the issue could be?

[@Zachhidden]

once i finish ofhg, belts, belt, tensioner, idlers and plugs ill have to do this, already have jb4 with catless dp, car is fast but this would take it up a notch for sure.

[@BMWFanatic]

Zach hidden oh it's great!!

[@damiandoan3907]

Love your videos. Do I need to have a JB4 installed to use the JB4 map? Can I just install one of the jb4 maps onto the stock DME?

[@domg9374]

Your videos are awesome and very intuitive. I’ve watched many of your DIYs for maintenance, and now I’m ready to mod my ‘09 335i Convertible 70k miles. All the bolt-ons are enroute along with the JB4. Are you still recommending the same back-end flash or is there something else I may have missed?

[@TheTurk203]

hey i have a 335i on 93oct. i have FMIC, DP'S, Exhaust and jb4. quick question can i run JB4 on map 5 and get MHD stage 2? would that be safe or what would you recommend?

[@dainese01]

Woah. Almost didn't recognise you with a t-shirt on! Haha. Keep up the good work. Thanks

[@dandenoble5324]

Hi there! Realize this video is a couple of years old but do you know if I can use the higher end Bavarian technic cable (believe it runs around $180).to flash. I have it laying around and haven’t used it yet. Any info is appreciated. Thanks for continuing to put out great videos!

[@twinturbo8304]

Your info is good

[@shanedial4985]

Excellent vid, brother. Question: My 08 535i currently has BMS CP w/Tial BOV, BMS DCI's and brand new plugs/coils. Should I upgrade my DP's and/or FMIC before running an MHD BEF? Or, would I be fine with my current mods?

[@ericsarahhill]

So why is the mhd back end flash so much better that just the jb4 on map 5 and why run both and not just mhd ? I'm fairly new to BMW but I do have a jb4 and dci on my 535xi . I guess I'm just ignorent to all the technical details ! And info or links to learn would be appreciated thanks!

[@BMWFanatic]

erichill79 It's the JB4 back end flash via MHD. The back end flash is still made by Burger Motorsports. It brings the safety features of the JB4 and on the fly map switches with the power of a flash tune

[@eddieellison7679]

Not hating at all but that makes no sense! So it basically the same thing as map 5? I have JB4 with Bluetooth. Is on the fly for guys that are wired?

[@tonycadena29]

can you reflash your car with different options without having to connect the battery and everything like on the fly?

[@giliangibby3065]

When I google jb4 mhd N54 tech nothing comes up can not find any files for ub4

[@EthanParker61]

Is there any chance you will be making an updated video now that MHD supports iOS? Or is it basically the same thing?

[@taibanh5046]

Do this backend flash works on n55 too and what setting and map you use on jb4. Thanks

[@BMWFanatic]

Tyler Banh It does, but refer to this 😀 www.n54tech.com/forums/showthread.php?t=43151

[@samerpatel737]

I currently have mhd stage 2+ flashed. I do not have the factory DME bin file. Could I still do this? I am being gifted a jb4 unit from a friend.

[@pranaysharma9251]

I have Cobb / OE tuning dealers around me but not JB4. I am not in to track, drove an M3 and loved the throttle response. Want to upgrade my 2007 335i 6 speed with 85,000 miles to somewhere around 350-370 WHP with least money. I can deal with less power, but want more stability as I am mechanically challenged. I already bought the Dual Air intake cones you recommended in other video. Did walnut blasting and now start hearing waste gage rattle noise. Would hate to replace twin turbos. Can you suggest something please ? What made you go with JB4 and not other tuning options ?

[@pranaysharma9251]

Where did you make payment for JB4 79.99 $ ? I do not see payment option in MHD app. Please help

[@laserguy815]

Hey fanatic can you please help me! So I have a 2008 e92 335i fbo + mhd stage 2+, say I buy jb4 with the g5 chip, do I install the jb4, then use mhd to backend flash? And will that essentially allow me to change the maps, and always use map 5 (some days 91 gas only, some days 91 + 4 gallons of e85, then fill up with 91) etc, will I still also have the burble setting when I use jb4 + mhd, and with this backend flash, it’s pretty much using mhd performance, but having the safety features and map selecting with jb4? Also is map 5 recommended for fbo + mhd/jb4 backend flash + 91 and 4 gallons of e85, thanks! Sorry if it’s a lot I just don’t want to break my car lol... it’s been very well maintained but I’d rather just save headaches

[@laserguy815]

Also, can I data log with mhd, and turn off/adjust burble setting or adjust anything with the mhd app? Or will I need to use jb4 software to data log and adjust? Or can I use the mhd app on my tablet for everything including data logging?

[@crventura]

I'm very confused; why would I flash my DME if I'm using a JB4 ? Does'nt the JB4 manages Maps like the MHD flash ?

[@fejzullahsadiku5444]

hello.. when i connect the car stay the dme can not connect. why? dkan is new but i dont try it with battery charger

[@MrDjSaneR]

I'm a bit confused, My 335xi is FBO w/meth. I currently run the JB4 on Map 3. If I were to BEF with the MHD map, what map would I set the JB4 to? Additionally, how will my meth be controlled?

[@maksymmelnychuk4743]

Hey sorry for the late comment but in this video you talk about a pump flash, race flash, and e85 flash (bef). You also say that the pump flash is good with up to 30% e85 how much ethanol content could I use with the e85 flash? Would the e85 flash work up to 100% e85 or e60 or how much?

[@rajlamport1522]

I'm about to purchase JB4, would you recommend getting the Bluetooth version? Or should I get the cable version and run an android tablet with the usb OTG cable?

[@tonybrider]

In the settings for your mhd bef. Did you select the oem cats setting. Or leave it off. I have installed the pump flash with soft burbble and oem cats on. And it keeps throwing a running lean code.

[@grownman880]

What happens if you flash a map without the jb4 in map 0??

[@otamendi37]

I have a little doubt. Can install stage2+ map of mhd having a jb4 after doing the BEF??

[@N54-]

For some reason mine didn’t work and I did all the steps right, do I do something else? I need help

[@juliocadena3559]

When putting it on 4/2 after flashing , do you have to press volume down or anything to enable the backend ?

[@josepaez98]

I have jb4 and I want to do mhd only for the burble tune, nothing more. How can I do that??

[@connorturnbull7008]

Greatt video doing mine today👍🏻

[@wildog0987]

Need some help i followed the steps in this video now the car will not boost. Any suggestions

[@brittoaugustian1688]

Does the bef has an option to remove speed limiter?

[@jorgetorres3488]

Hi BMW Fanatic, Did you download and update the jb4 firmware before flash? I was reading on to N54 Tech forum firmware section and shown four or five firmware. Do you know which one is the most recent? The other question is which bin file did you download? for example; from JB4_BB2_I8A0S_PUMP_01.bin up JB4_BB2_I8A0S_PUMP_21.bin also this option JB4_BB2_I8A0S_PUMP.bin. I'am really confused. Can you clarify me please? Thank you. PD. My car is 2007 335i Sedan A/T. The same mods that your have has. Sorry the English does not my Native Language.

[@Asunima]

Do I need to re-tune my bef if I go from stock turbos to pure600s? Using 93 pump.

[@kfinesse669]

Im bit confused, Did you install the burger tuning stage 3 kit or you did everything off tablet ?

[@rickster1269]

Why when I try to go into 4/2 mode it acts differently, meaning 4/2 seems to enable transport mode?

[@pranaysharma9251]

I have JB4. I dnt have MHD. What is the benefit of having both ? Can someone please share thoughts !!

[@raymondnguyen3169]

Hi bmwfanatic! Did you have lean afr issue prior to the bef? I’m full FBO with jb4 on e30 and I’m hitting 13-15 afr. Will MHD bef pump flash help my afr? How’s your afr right now?

[@LachysGarage]

Love it. Wish i could do this with a 330i XD

[@mr.valentino2824]

Hi, I downloaded the winzip app and I'm trying to install the 6/15/17 map release but once I've picked my version it say that the file is corrupt and can't be opened. Any advice??0

[@AntsE90]

Hey Im going to do the bef mud and there r 3 hyper links. Idk which one to pic

[@justingrigg8440]

I got a 2011 535i jb4 tune and about to get mhd so would I purchase the $250 license or the jb4bef $79 license or both? And do would buying a mhd map pack with jb4 be considered (more gains)?

[@GeoffryMoto]

should be somewhere in the settings on the tablet you can set it so when you connect the cable to the tablet it will open mhd right away

[@BMWFanatic]

Jeff Kempienski Just figured that out lol

[@dfishr]

if i already have mhd and flash it back to stock (without removing mhd) can i just plug the jb4 in then flash it with mhd that way? or do i have to remove mhd completely then plug jb4 then flash

[@sean_finch]

I already have jb4 and I want to get mhd for the burble. What map do I buy? I’m full bolt on’s.

[@patric8470]

Would the MHD guages licence work with jb4 + back end flash? Or is it only for straight mhd tunes only?

[@sammykbtt]

Hello and thanks for the great videos as I am a newbie to the BWM scene. When I purchased the car (2007 335i n54 auto) the previous owner installed a custom MHD tune with FBO and Pure Turbo Stage 2. Last night I installed the JB4 for the safety reasons mentioned in your videos. Is it possible to save the MHD custom tune and then load it as a BEF? I really don't want to lose the custom tune. Any help or links would be greatly appreciated. I guess my actual question is: Can I backup the current ECM program and then download it as the BEF? Thanks in advance and keep up the good work

[@joshlynn6567]

Saving a DME backup should save whatever flash is on the right now. So yes, your backup would be the custom tune rather than stock.

[@esmathabib1028]

hey first of all gotta say I love your channel amazing content lots of useful info keep up the hard work. so my question is I got a 2007 335i sedan with JB4 full bolt ons just did the backend flash today didn't feel any difference plus when I push over 6k rpm car goes on limp mode can I flash a stage2+ MHD map would it help? thanks

[@BMWFanatic]

+Matt S What map were you running? Did you switch it to 4/2?

[@BMWFanatic]

+Matt S the MHD maps have no relation to the backend flash by Burger Motorsports

[@TowProVlogs]

how do i access the wastegate tune on MhD? I have straight pipes and i would like to make it alot louder than it is. I seen a few videos on youtube that sound insane with it and i would like to get it

[@twinturbo8304]

Well how does it run.?

[@Willabeast]

i cant seem to find out anywhere if the backend flash can do the burble part of mhd?

[@jessel1650]

Hey I know this video has not had comments for awhile.. but there is no new videos how to install MHD back end flash.. I’m installing now and trying to find the n54tech back end flash maps and it’s not on google anymore, do you know where to find the updated maps thanks

[@BMWFanatic]

They are on N54tech.com

[@moali2354]

@@BMWFanaticout here saving our lives

[@cucooone]

I'm new to the bmw scene. Previous car was an Audi B5 S4. Tuned and quick. I now own a 335i but it has the N55 motor. I know not quite at tunable as the 54. Does the 55 have any similar flash options? Or is the jb4 and similar piggybacks the only option? Thanks in advance for your time

[@BMWFanatic]

Dan Rice sorry for the delay, depending on the year for yours you can do an MHD flash

[@ericsens4070]

Hopefully this fixes my trims haha N54

[@Khaled-xc5ku]

life saver

[@art_n5x]

So how does the jb4 work if you use map 5 auto tune with a backend?

[@patrickraimondo-kensek4029]

**NEED HELP** !!! i installed mhd backend flash to my jb4 exactly how you said, everything works fine... my issue is that now i need to go to inspection... so i had the backup stock map that was generated as you did and i flashed it back to stock went back into jb4 put it on 4/3 and turned jb4 into bypass mode (speedo 0/tach 0) now when i use the mhd to check the dme i got incompletes for my catalyst, evap system and o2 sensor, the rest are complete or not available... i saw the driving cycle and i have only drove the car for 2 days since i flashed back to stock... please help or give me any advice and let me know if im doing this process right... hate to fail inspection because the mhd flash :( btw the car has stock cats and no sensors have been messed with... all was well before the mhd pump flash...

[@BMWFanatic]

I would check it with the JB4 and see the codes. You might have an O2 sensor failing and an EVAP issue is somewhat common. Luck of the drawl sometimes on these cars when shit pops up on the dash. You could clear the codes and see what comes up again

[@rodneymanor2000]

hey so i just downloaded it and i dont know how to purchase the backend flash from the store. Clicked on MHD licenses store and it says no licenses... do i need to connect this to my car first?

[@BMWFanatic]

You don’t have to purchase the backend files - you have to pull them from N54tech.com. You do have to purchase the backend flasher for $79.99

[@JS-bn4hp]

Quick question, so after you BEF, you reconnect the JB4 OBDII and set speedo4/tach 2. After that it says select your JB4 map again, does that mean if I was running JB4 map5 before the flash do I just put it back to map5?

[@jkirkabraham7652]

JS0228 87 good question and I can’t seem to find an answer on this....

[@m1chaelw00ds]

HELPP Is the BimmerGeeks KDCAN Cable suppose to stay lit the entire time it is connected? I am having issues connecting to my car and and seem to target the issue. I plug in the BimmerGeeks KDCAN Cable and it lights orange for 2 seconds then red 1 second then goes off. Is this nominal?

[@joshlynn6567]

No, mine turns off. Try this... make sure the car is on but not running and hooked up to your device first, then plug it into the OBD port. Counter intuitive, I know, but my cheap kdcan cable "sleeps" if I dont get it plugged into the device quickly.

[@peteryup]

I need bel my 335i has jb4 and backend flash .when I turn car on flashers are on Can't see when I turn my turn signals cause they just solid green?

[@joshlynn6567]

Put your car back to stock with the saved bin file that you hopefully created before flashing, then reflash.

[@domg9374]

Where do i find the DME version in the MHD app?

[@MIAUSPT]

Hi, first of all thank you for all your videos. I use 97oct petrol, which flash do I use?

[@BMWFanatic]

93 octane pump flash

[@MIAUSPT]

BMW Fanatic thank you mate. 👍

[@ecatano]

What are your thoughts on the bmw i3?

[@justinnguyen7199]

Will this work with the 340i b58?

[@WeeDxBLaZeR]

Just had all 4 pre and post cat , heater probe sensors come up, is there a fuse that they run on or do you have any advice on what to do ? Cheers

[@BMWFanatic]

WeeDxBLaZeR Have to replace

[@bogdananghel9480]

i really like when you turn the engine on the clusters doing that full check. can you do this in ncs expert? i have a e90 2006

[@BMWFanatic]

Bogdan Anghel It's a JB4 option - not sure about NCS

[@joshlynn6567]

Menu 5 option 7 gauge sweep.

[@blakechapman866]

In alot of your videos you do one quick click on the start button to just turn the ignition on without actually starting the car. No matter how I try that on my 09 335i the car fully starts. Any ideas?

[@HoustonInkFiends]

blake chapman push the button without foot on brake.

[@blakechapman866]

Jesus Aguirre thanks I'll give that a shot!

[@kingminkhant]

Did you have your doors open ? Make sure your driver door is closed. It doesn't work with driver door open.

[@BMWFanatic]

blake chapman Yep those too ⬆️

[@koachk5360]

Yup, no foot on brake pedal. Then press ignition button.

[@jojk7562]

What happens if u open the door

[@cheasong1]

Thank you for this video, i plan on doing a backend flash very soon to run meth kit

[@rong16]

LIKED BEFORE WATCHING

[@BMWFanatic]

GrandDaddy Clutch thank ya

[@rong16]

No problem. So we only need to purchase the JB4 back end flash, no other flash or license needed?

[@BMWFanatic]

GrandDaddy Clutch correct! 79.99 that's it

[@rong16]

Thanks. Best DIYs, please continue the great work.

[@BMWFanatic]

GrandDaddy Clutch will do!

[@mueedk2]

I’m still confused, what does the backend flash do that the JB4 or a normal MHD tune can’t? Does it mean that Map 0 will act like an MHD tune?

[@BMWFanatic]

Mueed Khan backend shifts fueling, timing, Vanos to the DME side and then the JB4 is used as the boost controller. They work very well together as they are made for each other

[@BMWFanatic]

Mueed Khan More power and smoothes out the JB4 when driving

[@BMWFanatic]

Mueed Khan you would select your JB4 map still. The majrority of the JB4 maps bump up 2psi.

[@mueedk2]

BMW Fanatic oh okay thanks for the response, hm more power does it usually make it(approximately?)

[@Ecko92]

Cant you use a mhd to use some ib4 maps?

[@alaindesir11]

Does this method still work I've tried it and it just says format cannot be zipped

[@BMWFanatic]

+alaindesir11 Are you using the winzip program?

[@DrFec]

BMW Fanatic you have an awesome channel. I also have a JB4 since 06/2017 and I'm planning to get MHD backend flash, just like you! What was the exact file name you flashed? Thanks

[@BMWFanatic]

+DrFec I8AOS pump one

[@DrFec]

It's funny, I8AOS folder has only JB4_BB2 files, but no JB4_MHD files, you flashed it anyway?

[@BMWFanatic]

+DrFec Yes, Terry said the BB2 will work on both MHD and Bimmer Boost

[@BMWFanatic]

+DrFec he did a new update recently

[@DrFec]

Ok, thanks, man!

[@zaidmoola2411]

Is your car a 330i?

[@isaacshacky17]

What do I need to run e85 on my 2014 535i f10 n55

[@bmw_for_life8902]

How do u find out yr dme version

[@joseph4333]

CAn I use NOCO Genius G3500 6V/12V 3.5A UltraSafe Smart Battery Charger its only 3.5amps or do I need more amps during the process?

[@Dutch79]

Jose ph Yes. The CTEK used here is also way too weak for a flash like this. A power supply of 30A max is the safest.

[@xMrxiHacks]

I recently purchased my car and had no clue it had a JB4 in it and I have very little knowledge on how it work and what maps I should set my car to the car does have the Injen Dual Cone intakes and a magnaflow exhaust I was wondering what map I should set it too I check my pressing the buttons and its at 0 - 0 was wondering if you could recommend what I should try out.

[@oseasalvarez1748]

Space Coupe N54 are those the only 2 mods you have? If so it’s recommend to start on map 1 it should target around 13psi i believe versus the stock 8psi and do some logging to see if the car is pulling correctly. If you want to use map 5 that is an auto tune map which means it’s constantly changing and should target anywhere from 13-17psi depending on your mods and your octane level. Just remember to log your runs see how the car is feeling with the new power before you try and go crazy. Map 2 targets 15psi? But you need at least catless dp’s to safely run it and i think it’s recommended you use 93 (could be wrong). But this is just starting off You can definitely google this and get more information I suggest reading this thread here www.n54tech.com/forums/showthread.php?s=f344a0627ab82a2df4b90ebbd58f0c42&t=10605 And just remember to enjoy that car!

[@xMrxiHacks]

Oseas Alvarez Awesome thank you!

[@joshlynn6567]

Just put it on map 5. It will add timing until optimal and pull timing when based on iat. Then feel free to mix up to 40% e85 in the tank and have fun.

[@jamesgodsy6944]

BmwFanatic do you have to connected to WiFi while doing the BEF ?

[@joshlynn6567]

Shouldn't have to. It's why the file is stored locally on the device and put in airplane mode.

[@joshlynn6567]

Headlights blaring in the background during the line "that fuel pump uses alot of power."

[@jppaul1997]

Josh Lynn ,You seem to have great knowledge on the N54/Jb4 set up.. if you could email me possibly? i have some tuning issues here and there id love some help diagnosing! :-) email- [e-mail] also, anyone else who could help would be great! MANUAL! n54 E92, JB4, DCI, (prev. owner claims catless dp), pheonix charge pipe and intercooler from bms, muffler delete. bms cowl filters, any key mods i could be missing for running smoother? BOV, high flow inlets? or stronger silicone couplers for fmic? *think burger just designed some. want to back end flash next! thanks all help is appreciated!!! the ultimate driving machines! :-)

[@3alaaa]

some people say it gives power and people say it dosent, what is your take on this? if yes how much more power?

[@BMWFanatic]

It bumps up the boost 2-3psi more on map 1, 2 and 7...so yes much faster 😀

[@ICYUH8NONME]

I usually run a 50/50 e85 mix so initially I'd do the e85 backend flash, but what if I want to run just straight 93 when e85 isn't available?

[@BMWFanatic]

+Mel B Then you would run the backend flash pump map

[@ICYUH8NONME]

BMW Fanatic ....is this something I can change on the fly like switching JB4 Maps or would I have to flash the DME again using the Dcanbus cable etc.?

[@BMWFanatic]

Mel B That's the joys of the JB4, you can still change maps on the fly even with having on a backend flash, so yes!

[@raymondnguyen3169]

bmwfanatic, great vids man! im fbo and running a jb4. thinking about mhd backend pump flash. im just curious if it will help with my afr because my car is running 13-15 at wot. im running a e30 mixture and would like to know if youre having the same lean issue before the bef

[@NexusAbstracts]

wait, can i not flash from my laptop with all of the cables (minus the otg cable)?

[@BMWFanatic]

NexusAbstracts That would be the BimmerBoost flash via a laptop (only for the JB4 backend flash)

[@greasemotorsport3926]

So would it be pointless to purchase a back end flash if you’re just gonna use regular fuel ?

[@BMWFanatic]

Nope! It raises the boost 2-3psi more. So it’s a win win even if you use regular fuel

[@Zsword92]

But doesn't it also reduce timing advance? Therefore result is very similar power to JB4 on OEM flash?

[@joshlynn6567]

@@Zsword92 that would depend on different things. Altitude, IATs, and whatever else goes into the algorithm that determines when to pull timing.