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Terry @ BMS Terry @ BMS is offline
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Join Date: Jan 2008
Default JB4 BETA for E70/E71 2010-2013 S63 X5M & X6M - 08-07-2016, 01:36 PM

**** 6/17/17 Update: We've decided due to higher than expected support requirements and low sales volume no longer to offer the S63 JB4 system. We will continue to offer the BMS Stage1 for the S63, it requires the N63/S63 Harness A model. For those who want to DIY an S63 JB4 kit you are welcome to do that just realize no BMS support will be provided. The required hardware and BCM are the same as the N63 JB4 TypeA and the S63 firmware is at the bottom of this post.

Hey guys,

A local customer dropped off a 2013 X6M for us to play with. These are equipped with the S63 twin turbo V8 motor, which makes a lot less power than the latest 2015+ S63tu X5M/X6M/M5/M6 motor.

We currently offer the Stage1 system for the S63 which adds a static 3-4psi across the board with no user adjustment or logging. While it wakes the car up there is plenty more power left on the table with a more advanced JB4 tune running the wastegates directly, CANbus, etc. After some digging it appears the DME is an MSD85 and it uses the standard E series KOMBI (dash) module, so everything is setup up for a nice JB4 system with full in dash controls, map switching, in dash boost gauge, etc.

The system is relatively complex to install so check the N63 JB4 install information before ordering. You'll need to disassemble a DME connector to attach 4 plug and play wires, etc. At this point we'd ask only people who are installing themselves order. The documentation is not really adequate for a shops inexperienced in installing this type of a system to handle. And frankly supporting training shops on how to install the system is more of a headache than we're willing to put up with for this small volume product.

VBOX testing:

1/4 mile 12.0@118.9mph, 3.7s 0-60mph on the E30 map.

Map Guide:

Map 0: JB4 Fully Disabled
Map 1: Additive map targeting around 4psi over stock. BCM optional.
Map 2: Absolute target map targeting 15psi peak. BCM required.
Map 3: Absolute target E30 map targeting 19psi peak. BCM required.
Map 4: Stock tuning with CANbus active for logging and gauges
Map 5: Under development
Map 6: User adjustable map. Values below 10psi make the map an additive map while values over 10psi make the map an absolute target map.
Map 7: Progressive methanol map under development.

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After a few days of hard work I have the guys of the system working. Installation is very similar to the N63 in that you connect to the TMAP sensors using the Stage1 harness, then plug in extra wires for CANbus, fuel control, and the BCM. The fuel control, BCM, and CANbus wires connect inside the DME box. See the N63 JB4 installation video for basic directions on how that looks.

The tricky part on the X70 is reaching the DME and getting its cover off. You remove the panel and HVAC filter, pop out this piece, and then the DME cover takes a bit of patience to unlock.

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Inside the DME area the MSD85 looks just like the N63 DME. You pop off the connectors and pop in the JB4 wires using OEM contacts joining 2 pairs for fuel control and 2 pairs for the boost control. Finally CANbus connects using removable posi-taps.

If upgrading from a Stage1 kit then you'll first need to insert the new wires in to the Stage1 harness. Note that is the same as the N63 Stage1->JB4 document referenced below.

Install directions for s63 JB4:

1) Install the TMAP connectors and control box per the s63 Stage1 installation guide:
2) The S63 does not use OBDII CANbus and instead connects directly to the CANbus in the DME area using removable posi-taps. Using the included posi-taps attach the green/brown CANbus wires to the blue/red wire pair inside the DME box as shown.
3) The DME specific fuel and BCM wires attach to the DME just like the N63 system referenced here:

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After connection the JB4 box is placed as shown.

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Finally pop back on the factory covers. I left the BMS DATA cable sticking out for quick access. But the system is also fully compatible with JB4 Mobile for iPhone or Android use.

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The system has full E series wheel contorls including map switching, in dash gauges for boost, timing, AFR, etc, adjustable shift light, etc. We suggest turning on boost on fuel, setting menu 2 to 1. Menu3 is the user adjustable shift light.

Attached Files
File Type: hex JB4_S63_X5M_X6M_4.hex (76.1 KB, 141 views)

Burger Motorsports
Home of the Worlds fastest N20s, N54s, N55s, S55s, N63s, and S63s!

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