JB4+BCM advice

[apsuard]

I have a full ECU tune and love it but wondering if adding the jb4 adds any additional value? Can someone shed some light on what additional features or power the jb4+BCM would give on top of my ECU tune?

Thanks everyone

[KMORGSM5]

Other than logging data, can't think of much as to why you would stack of you are happy with your tune.

[13M5F10]

Originally Posted by apsuard

I have a full ECU tune and love it but wondering if adding the jb4 adds any additional value? Can someone shed some light on what additional features or power the jb4+BCM would give on top of my ECU tune?

Thanks everyone

Youll want a backend tune that's to support the JB4/BCM. Adding the JB4/BCM and using the map settings can/may do more harm than good to your car.

[mike@x-ph.com]

Originally Posted by apsuard

I have a full ECU tune and love it but wondering if adding the jb4 adds any additional value? Can someone shed some light on what additional features or power the jb4+BCM would give on top of my ECU tune?

Thanks everyone

If you get your tuner to adjust the map now that a JB4 has been added, yes there is a lot more hidden power

Adding the Jb4 without adjusting the map might not give you much

[m5james]

It's my understanding that tuning has advanced enough on the S63TU engine that the JB4/BCM stack, other than logging, is pretty much obsolete now. Guys are running 700-800 with only flash tunes and stand-alone meth kits, no?

[mike@x-ph.com]

Originally Posted by m5james

It's my understanding that tuning has advanced enough on the S63TU engine that the JB4/BCM stack, other than logging, is pretty much obsolete now. Guys are running 700-800 with only flash tunes and stand-alone meth kits, no?

All the world records for this car have a JB4

[m5james]

That's why my last sentence was a question

[momos750]

Originally Posted by m5james

That's why my last sentence was a question

You need JB4 and BCM to increase boost.
I believe max boost with a flash tune is 22.?psi.
So with JB4 and BCM you can increase boost past 22psi is my understanding + you get increased logging capability.

[TheHouseWon]

Some tuners are exceeding 22 psi without JB4 BCM. Something to do with 3.5 TMAP

[Mike@N54Tuning.com]

Originally Posted by momos750

You need JB4 and BCM to increase boost.
I believe max boost with a flash tune is 22.?psi.
So with JB4 and BCM you can increase boost past 22psi is my understanding + you get increased logging capability.

The JB4 gives you the ability to tune up to 36psi, multiple on the fly maps, meth support, better safety systems than are available flash only, boost by gear which is very valuable for launching the car, datalogging to your phone, an in dash boost gauge, etc.

[TheHouseWon]

Mike, I'm going to assume one, if not 2, things:

-you have an ownership interest in BMS
-the margins on JB4/BCM are juicy

Neither is a bad thing, I just notice you focus solely on the benefits and none of the challenges.

[M6Pilot]

Originally Posted by TheHouseWon

Mike, I'm going to assume one, if not 2, things:

-you have an ownership interest in BMS
-the margins on JB4/BCM are juicy

Neither is a bad thing, I just notice you focus solely on the benefits and none of the challenges.

True! But I think he is right to do so as to keep the playing field level, as they both have value and it ultimately boils down to what the owner/driver is looking to accomplish.

[TheHouseWon]

Originally Posted by M6Pilot

True! But I think he is right to do so as to keep the playing field level, as they both have value and it ultimately boils down to what the owner/driver is looking to accomplish.

I own JB4 BCM and know its limitations especially the JB4 Connect Bluetooth device. But that device is not made by BMS.

[Mike@N54Tuning.com]

Originally Posted by TheHouseWon

I own JB4 BCM and know its limitations especially the JB4 Connect Bluetooth device. But that device is not made by BMS.

I'm an authorized BMS dealer and can provide limited technical support, but if you need help the real pros are on n54tech. If you have a challenge or problem its best to post there for direct help or even email in to BMS. I use JB4 mobile almost daily with my M3 and love it, never had an issue.

Mike

[m5james]

Originally Posted by TheHouseWon

I own JB4 BCM and know its limitations especially the JB4 Connect Bluetooth device. But that device is not made by BMS.

What are the devices limitations? I've only got the general idea of what the JB4 does but haven't gotten into specifics until now since it was just finally released for the S63.

[TheHouseWon]

Originally Posted by m5james

What are the devices limitations? I've only got the general idea of what the JB4 does but haven't gotten into specifics until now since it was just finally released for the S63.

Its inconsistent even on map 1...sometimes it feels like it's on kill mode others it feels limp. I dyno'd it and it was all over the place, then I tried to log runs to see if a shop can fine tune it but the Bluetooth connect kit didn't connect or only read a small portion of the rpm range.

ECU tune is the way to go because you are changing values (reprogramming) vs. JB4 is sending modified signals to a stock ecu. It is hard for JB4 to stay consistent because the stock ecu adapts to normal, non-tuned, driving whereas a flash tune your ECU is always ready to put down the power.

JB4 is great for people that want more than 700whp because it can control the amount of boost. It also works for meth and boost by gear (if your into launching or 1/4).

These are just my views, please correct any inaccuracies

[ur20v]

^^^ weird, my car runs consitantly in map 1, 2 and on map 3 with meth. Solid times and results. Only time power delievery ever changes is when traction control is on fully or in MDM mode and traction changes this causes a very notiable change in performance which A/ you want and B/ you would get with a flsh or OEM.

[m5james]

Originally Posted by TheHouseWon

Its inconsistent even on map 1...sometimes it feels like it's on kill mode others it feels limp. I dyno'd it and it was all over the place, then I tried to log runs to see if a shop can fine tune it but the Bluetooth connect kit didn't connect or only read a small portion of the rpm range.

ECU tune is the way to go because you are changing values (reprogramming) vs. JB4 is sending modified signals to a stock ecu. It is hard for JB4 to stay consistent because the stock ecu adapts to normal, non-tuned, driving whereas a flash tune your ECU is always ready to put down the power.

JB4 is great for people that want more than 700whp because it can control the amount of boost. It also works for meth and boost by gear (if your into launching or 1/4).

These are just my views, please correct any inaccuracies

So skip the Bluetooth device? I'd looked forward to that since I did a tablet mount months ago after reading an N54Tech thread where they recommended a specific tablet on an JB4/MHD thread.

I've got a tune done by Halim, and while I completely understand why, but he's not investing a kit lot of time into my S63 platform since the S55 and S63TU are far more popular. I've been looking forward to the JB4/BCM for the benefits of logging and pushing boost past normal tuning levels that are tune limited still for my platform.

I know the S63 can't be pushed as hard as the S63TU, but the added 4psi from my tune has already gotten old :-) I agree that piggybacks are kind of a bandaid fix, but I'm far more limited in options at this time.

[Mike@N54Tuning.com]

Originally Posted by TheHouseWon

Its inconsistent even on map 1...sometimes it feels like it's on kill mode others it feels limp. I dyno'd it and it was all over the place, then I tried to log runs to see if a shop can fine tune it but the Bluetooth connect kit didn't connect or only read a small portion of the rpm range.

ECU tune is the way to go because you are changing values (reprogramming) vs. JB4 is sending modified signals to a stock ecu. It is hard for JB4 to stay consistent because the stock ecu adapts to normal, non-tuned, driving whereas a flash tune your ECU is always ready to put down the power.

JB4 is great for people that want more than 700whp because it can control the amount of boost. It also works for meth and boost by gear (if your into launching or 1/4).

These are just my views, please correct any inaccuracies

Should not be like that, must be set wrong. You'll want to send logs to tech support or post them to n54tech for advice. The JB4 gives the same power run after run and never feel inconsistent or different.

Edit

I think I know what is set wrong based on your post. Update to the latest firmware and then set the future use d setting for slower canbus speed. I'd bet $5 that fixes your problem. Some cars need the slower canbus speed or logging and tuning cycles on and off randomly.

Mike

[TheHouseWon]

Originally Posted by Mike@N54Tuning.com

Should not be like that, must be set wrong. You'll want to send logs to tech support or post them to n54tech for advice. The JB4 gives the same power run after run and never feel inconsistent or different.

Edit

I think I know what is set wrong based on your post. Update to the latest firmware and then set the future use d setting for slower canbus speed. I'd bet $5 that fixes your problem. Some cars need the slower canbus speed or logging and tuning cycles on and off randomly.

Mike

I'll give it a shot, but I'm still getting a tune.

Looking at BPM as the front runner

Thanks

[m5james]

Is the Bluetooth inconsistent because of the above mentioned CANBUS speeds or is this only related to inconsistent performance? I don't wanna buy a half functioning Bluetooth dongle for $150 only to have it be a novelty item that never gets used.

[Mike@N54Tuning.com]

Originally Posted by m5james

Is the Bluetooth inconsistent because of the above mentioned CANBUS speeds or is this only related to inconsistent performance? I don't wanna buy a half functioning Bluetooth dongle for $150 only to have it be a novelty item that never gets used.

The issue with some M5/M6's needing the slower speed CANbus bit toggled in the user interface is for the s63tu motors. Has nothing to do with your s63 or any other JB4 application. That issue also has nothing to do with JB4 mobile. It's a JB4 firmware/CANbus speed issue.

FWIW as of a few months ago the slower speed setting is enabled by default on s63tu applications for those who don't run a detachable or JB4 mobile.

Mike