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      01-04-2018, 09:05 PM   #1
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JB4 MHD Back End Flash (BEF) development underway!

Saw this posted on BMS' forum and thought you guys might enjoy following along. I'll update this thread as I get new news. Also, in another thread here I was asked about the JB4 WMI (water meth injection) implementation. It's the only available system that integrates WMI flow with engine tuning allowing a wide range of safety systems and control not possible with "dumb" (e.g. no CANbus engine connection) stand alone controllers. There will also be free MHD back end flash maps optimized for the JB4+WMI kit. All free of charge for JB4 owners, no need to pay custom tuning fees or buy expensive new hardware. You just pay the one time MHD flasher license. 2018 is going to great for the F series!

Quote:
Was able to flash our M3 today using the MHD BETA tools, so easy! Back end flash development is full swing ahead.

Among the top tuning priorities are a 0-100% E85 auto tuning map, where you mix in whatever fuel you want and the JB4 sorts out the
details to safely extract the most power from whatever fuel you happen to be running, and a BEF designed to optimize lower grade fuels like
91 octane. In addition we're going to add some logging channels to the JB4 also to facilitate working with back end flash mapping like the
LOAD index.

As always our JB4 BEF maps will be published fully unlocked and free of charge so those who like to tweak things themselves can fine tune
and adjust as much as your heart desires.
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      01-06-2018, 07:35 PM   #2
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Great news! Subbed
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      01-07-2018, 06:10 AM   #3
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Subbed to see updates. I got my JB4 a few weeks before they announced the MHD flash capes. Havent installed and deciding if I will keep it or not.
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      01-07-2018, 08:29 AM   #4
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Subbed. I'm looking to drop JB4 for MHD but if I can just flash it via JB4 I'll keep it
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      01-07-2018, 08:53 AM   #5
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      01-07-2018, 12:36 PM   #6
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MHD is not yet supported on iOS but apparently will be soon!
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      01-07-2018, 03:05 PM   #7
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Quote:
Originally Posted by Marlinman View Post
MHD is not yet supported on iOS but apparently will be soon!
Do you suppose this means one will not need an org compatible android device whatsoever to use the mhd flasher and bimmergeeks cable to upload a back end flash tune? If so this is great news and will save me from having to buy some android device solely for the purpose of the flash
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      01-08-2018, 09:46 AM   #8
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They're looking around for people to help test and evaluate the JB4 back end flash maps.

First you'll need to contact MHD to get in their F series test group. Then you'll use MHD to flash stage 0, take a backup of your factory BIN, then email that factory BIN backup to BMS along with details on the car like mods, fuel, tuning goals, and they'll send the most appropriate BEF. You DO NOT need to purchase any MHD map package or logging package since the JB4 does that for you.

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      01-08-2018, 05:48 PM   #9
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Quote:
Originally Posted by Mike@N54Tuning.com View Post
They're looking around for people to help test and evaluate the JB4 back end flash maps.

First you'll need to contact MHD to get in their F series test group. Then you'll use MHD to flash stage 0, take a backup of your factory BIN, then email that factory BIN backup to BMS along with details on the car like mods, fuel, tuning goals, and they'll send the most appropriate BEF. You DO NOT need to purchase any MHD map package or logging package since the JB4 does that for you.

Mike
I am kind of clueless with the tuning side. So I understand this, I will need to do the initial flash of MHD stage 0 through MHD, using an Andriod Device and the Bimmergeaks cable (so I need to add the cost of the cable and MHD). Then email the BIN to BMS. The actual flash tunes from there would be through JB4, through the JB4 app? Which are maps optimized through BMS?

Why is this better than just using MHD to flash and then using their maps? Because BMS maps are free? Or are there other positives to staying with the JB4?

I do not have an Android device, but do have a JB4, so this is why I am considering this route. But I have not installed my JB4 yet, so if I can save that headache of not having to run the wires, and get the same end result, I am considering just selling the JB4. But if the JB4 will allow me to use just my JB4 App on my iOS device, i would rather do that.
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      01-08-2018, 07:57 PM   #10
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I may have missed the answer somewhere but... can i flash the MHD baseline map without uninstalling the jb4 ( going into jb4 map 0) ?
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      01-08-2018, 08:17 PM   #11
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Quote:
Originally Posted by Eternal View Post
Quote:
Originally Posted by Mike@N54Tuning.com View Post
They're looking around for people to help test and evaluate the JB4 back end flash maps.

First you'll need to contact MHD to get in their F series test group. Then you'll use MHD to flash stage 0, take a backup of your factory BIN, then email that factory BIN backup to BMS along with details on the car like mods, fuel, tuning goals, and they'll send the most appropriate BEF. You DO NOT need to purchase any MHD map package or logging package since the JB4 does that for you.

Mike
I am kind of clueless with the tuning side. So I understand this, I will need to do the initial flash of MHD stage 0 through MHD, using an Andriod Device and the Bimmergeaks cable (so I need to add the cost of the cable and MHD). Then email the BIN to BMS. The actual flash tunes from there would be through JB4, through the JB4 app? Which are maps optimized through BMS?

Why is this better than just using MHD to flash and then using their maps? Because BMS maps are free? Or are there other positives to staying with the JB4?

I do not have an Android device, but do have a JB4, so this is why I am considering this route. But I have not installed my JB4 yet, so if I can save that headache of not having to run the wires, and get the same end result, I am considering just selling the JB4. But if the JB4 will allow me to use just my JB4 App on my iOS device, i would rather do that.
You have some of it correct, you don't upload the bms bef with the jb4 app you would upload it via the mhd flasher software on an android device. Think it sounds like they are working on an iOS version tho, fingers crossed.

All I wanna know, and have asked elsewhere with no answer, is what exactly will the back end flash provide to someone who already has a jb4? The common things I keep reading in these posts is how much a bef will improve a car with an upgraded turbo or for guys who run e85 but what about the rest of us?

Will my jb4 pwg catless dp f30 n55 6mt (my god this bmw turbo tuning acronym stuff is insane) benefit from a backend flash and if so how? What can I expect? Smoother? More power? More torque? More exhaust burble?
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      01-09-2018, 07:47 AM   #12
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Quote:
Originally Posted by akgambino View Post
You have some of it correct, you don't upload the bms bef with the jb4 app you would upload it via the mhd flasher software on an android device. Think it sounds like they are working on an iOS version tho, fingers crossed.

All I wanna know, and have asked elsewhere with no answer, is what exactly will the back end flash provide to someone who already has a jb4? The common things I keep reading in these posts is how much a bef will improve a car with an upgraded turbo or for guys who run e85 but what about the rest of us?

Will my jb4 pwg catless dp f30 n55 6mt (my god this bmw turbo tuning acronym stuff is insane) benefit from a backend flash and if so how? What can I expect? Smoother? More power? More torque? More exhaust burble?
It's early days to answer that fully but from the FAQ:

Quote:
What benefits does a back end flash map add to the JB4?

Adding in the back end flash map allows JB4 adjustment over a wider
range of engine parameters than are available on the factory flash.
Including direct adjustment of timing and fueling tables, VANOS
adjustment, fuel scalar adjustment for heavier E85 mixtures than
possible JB4 only, speed limiter delete, optional exhaust burble,
higher calculated torque reported to the automatic transmission, and a
host of other parameters than are only possible via flashing the DME.

What are the benefits of running a JB4 with a flash rather than flash
only for tuning?

While it's possible to tune an F series without a JB4 doing so comes
with many disadvantages.

1) With JB4s unique features and logic paths, combined with the
flexibility of adjusting DME tables directly via the back end flash
map, you get better quality, safety, and more powerful tuning. The JB4
includes more robust safety systems than are possible via flash only.
Starting with fundamental safety systems like reverting to a safety
map if boost exceeds your safety setting, if the air/fuel ratio in
either bank turns dangerously lean, or if fuel pressure drops below a
safe level. While you might think the DME alone can handle these basic
safety systems surprisingly it's not the case. The DME will happily
let you run along at full power and a 18:1 AFR, with boost pegged, and
the only fuel pressure safety provided is when fuel pressure drops
down so low fuel injection itself has to be suspended.

2) More mapping options including absolute boost target maps. The JB4
boost control system is programmed to offer both absolute and additive
maps. Absolute meaning you'll always target a specific boost level.
Unlike the DME which naturally implements a LOAD control system where
boost levels go down when it's cold and go up when its warm. The
opposite of what you generally want for turbocharged performance. In
addition the JB4 is quick and easily adaptable to a wide range of
setups eliminating the need for expensive custom boost tuning and the
risks that come with repeated logs on systems that are not yet setup.
It's not uncommon for engine damage to occur while a new setup is
initially being dialed in. The JB4 automatically tunes wastegate
dutycycle, fuel trims, and other important tuning criteria full time
in the background greatly simplifying the tuning process. In addition
the JB4 auto-tuning map can self tune for various ethanol mixtures
without the need of an expensive and difficult to install flex fuel
sensor. Pedal to boost mapping, spool aggression, boost by gear, and
other critical factors can be easily adjusted to suit the needs for
the particular track or racing situation.

3) On the fly changes. Whether it's changing the boost/power level,
boost by gear setting (including being able to disable it on the fly
for burn outs or if traction turns out to be better than expected),
pedal input, exhaust flap position, or what gauges are shown in dash,
the JB4 allows a wide range of user adjustment real time from the
drivers seat without having to use a 3rd party device or risk
programming the DME between runs. You're able to make the changes
while out on the track where you need to make them.

4) The JB4 allows for much better real time feedback to the driver.
User adjustable in dash gauges allow you to keep a constant eye on
boost, timing, knock, meth flow, and/or AFR, all selectable and
changeable on the fly from the drivers seat. A user adjustable shift
light can be triggered making rowing through the gears easier. JB4
Mobile allows wireless bluetooth logging via your Android or Apple
phone without a cable locked in your OBDII port. In addition you can
select map0 on the fly to allow OBDII port logging and diagnostics
when needed for vehicle service. The JB4 default logging set includes
all relevant data required for tuning including boost, timing
cylinders 1-6, AFR and fuel trims in both banks, high and low fuel
pressure, load, calculated torque, trans temperature, and many other
parameters. The JB4 provides a simple to use but incredibly robust
data logging system eliminating the need to select what parameters to
record before each run and providing instant on the fly charting
without the need of 3rd party internet programs. We routinely add
parameters to the JB4 logging set based on customer feedback and
evolving tuning requirements.

5) Integrated JB4 features such as anti-lag, port injection control,
flex fuel sensor, and progressive water/meth (WMI) control eliminate
the need for independent add on boxes that are more difficult to
install and technically unable to communicate with each other.
Integration allows these extra features to share information for a
smooth and cohesive tuning solution. When the DME requests a torque
drop due to traction or stability control the JB4, WMI, and PI systems
all respond accordingly. WMI integration is able to hold boost levels
low UNTIL fluid is flowing adequately to prevent spool up and
transitional knock, adjust your boost target if the fluid being
injected turns out not to be as potent as was expected or required to
prevent knock, and in the event of a fail-safe depending on the
severity of the situation either lower your boost target partially OR
instantly dump boost out the diverter/close the throttle/cut timing.
These are just some of the many examples of why having add on boxes an
features all integrated through a single system is advantageous.

6) Free maps for life. The JB4 is widely used and widely supported
including free unlocked back end flash maps and custom mapping support
from BMS via the n54tech support forum. BMS sponsors and attends
several 1/4 mile and 1/2 mile races per year continuously improving
the JB4 base maps and features based on real world experience and
feedback. These updates are provided free of charge to JB4 customers
via n54tech firmware posts.

7) The JB4 hardware is robust, reliable, highly developed, and
upgradable, with many thousands of systems in use since 2008 when it
was first released. The key to the JB4ís success is that it DOES NOT
replace the factory engine computer or DME. The JB4 simply adds on to
functionality already provided by the DME. As a result the DME remains
in full control of your engine at all times with the JB4 dynamically
making small but impactful adjustments to add in extra safety systems
and features and dramatically improve performance. And unlike
disposable flash maps the JB4 is a physical system you can remove and
resell down the road.

Once I flash the DME can the dealership tell? What if I flash it back to stock?

Modifying your vehicle is not without risks and we believe flashing
the DME is traceable even if flashed to stock. If you are really
concerned about your warranty, it's best not to flash your vehicle.
That said when used in conjunction with the JB4's expanded safety
systems and mapping use/guidelines, expect a relatively high level of
reliability at the elevated power levels.
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      01-09-2018, 10:07 PM   #13
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Glad to know JB4 is still trying hard to compete!

In BMS' opinion, at what power level would we see advantage with BEF+JB4 setup over flash only? And why?

Thanks.
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      01-10-2018, 07:25 AM   #14
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Quote:
Originally Posted by SeanWRT View Post
Glad to know JB4 is still trying hard to compete!

In BMS' opinion, at what power level would we see advantage with BEF+JB4 setup over flash only? And why?

Thanks.
With the JB4 self tuning and extra safety features, you can certainly push the tuning harder in a safer and easier way (e.g. without having to purchase customized disposable flash maps), but in terms of actual power numbers it's still pretty early. Once the BEF maps are closer to finalized I'm sure they will post a range of dynos demonstrating the differences.

Mike
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      01-10-2018, 08:31 AM   #15
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With just the flash would I be able to read and clear codes like I can with the JB4.
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      01-10-2018, 12:15 PM   #16
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What really means a "higher calculated torque reported to the automatic transmission".. What are the benefits/results?
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      01-10-2018, 12:37 PM   #17
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transmission after BEF flash will not work like crap like with jb4 only. As with jb4 only transmission thinks torque is stock and doing gearchanges like with stock torque. BEF + jb4 is better than jb4 only, of course. But the best is not use jb4 at all if possible

Quote:
Originally Posted by kevinjt View Post
What really means a "higher calculated torque reported to the automatic transmission".. What are the benefits/results?
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      01-22-2018, 07:24 AM   #18
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Any updates?
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      01-22-2018, 11:41 AM   #19
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Quote:
Originally Posted by mbanks21 View Post
Any updates?
Development is going along quite well. If you want to join in just email BMS or post in the n54tech thread on the subject. A couple logs I saw posted today testing a lower grade fuel back end map.




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      03-13-2018, 09:09 AM   #20
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      03-16-2018, 08:39 AM   #21
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Currently beta testing the JB4 PWG ISO firmware with an MHD BEF. My car is currently FBO running a stock turbo and 93 octane. I can report additional smoothness with the BEF over the JB4 alone, it has also made the car feel a bit more consistent. Power gains are minimal but my butt dyno says Iíve gained a few ponies. The power on 93 feels similar to a small mixture of ethanol with a stand-alone JB4. Once the weather improves Iíll be experimenting with an e40 mix of ethanol. Thatís where I expect to see the biggest gains in overall drive-ability and power.
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      03-18-2018, 05:03 PM   #22
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Quote:
Originally Posted by Niart906 View Post
Currently beta testing the JB4 PWG ISO firmware with an MHD BEF. My car is currently FBO running a stock turbo and 93 octane. I can report additional smoothness with the BEF over the JB4 alone, it has also made the car feel a bit more consistent. Power gains are minimal but my butt dyno says Iíve gained a few ponies. The power on 93 feels similar to a small mixture of ethanol with a stand-alone JB4. Once the weather improves Iíll be experimenting with an e40 mix of ethanol. Thatís where I expect to see the biggest gains in overall drive-ability and power.
Thanks for sharing.. Keep us updated!

Mike
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