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THIS PART IS LEGAL FOR USE ONLY IN COMPETITION RACING VEHICLES AS DEFINED UNDER CALIFORNIA LAW, AND IS NOT LEGAL FOR USE IN ANY OTHER MOTOR VEHICLE. California law defines a "racing vehicle" as "a competition vehicle not used on public highways." (Calif. Health & Safety Code 39048) This part may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event. Competition-only motor vehicles may not be driven to a racing event on a public highway and must be transported on a trailer or other carrier. USE OF THIS PART IN ANY OTHER VEHICLE MAY SUBJECT YOU TO FINES AND PENALTIES FOR VIOLATION OF FEDERAL AND/OR STATE LAW, WILL VOID YOUR WARRANTY FROM BURGER MOTORSPORTS, INC, AND CAN VOID YOUR VEHICLE'S WARRANTY. It is your responsibility to comply with all applicable federal and state laws relating to use of this part, and Burger Motorsports, Inc hereby disclaims any liability resulting from the failure to use this part in compliance with all applicable federal and state laws.
This is the central point of contact for all Mercedes Benz AMG C63 & C63S JB4 related information. Anything from install directions, to firmware updates, to settings, to frequently asked questions. Any and all relevant info is linked in this post. If you come across something missing from here be sure to let us know.
Order the full JB4 system here.
Map changes, datalogging, updates are done using the BMS data cable or the JB4 Mobile bluetooth kit.
JB4 Mobile Smart Phone wireless connection directions Click here
BMS data cable hard wired directions Click here
Map Guide as of V2 Firmware:
Map 0: Stock operation, JB4 disabled
Map 1: Default performance map, 4psi peak over stock, taper to redline
Map 2: 5psi peak over stock, taper to redline
Map 3: 6psi peak over stock, less taper to redline, suggested for E85 mixture or octane booster
Map 4: 6.5psi peak boost request over stock, less taper to redline, requires unleaded racing fuel or E85 mixture
Map 5: 7psi peak request over stock, less taper to redline, requires unleaded racing fuel or E85 mixture
Map 6: Custom additive boost profile, boost request over stock
Map 7: Progressive WMI (water/meth) mapping based on boost additive setting and WMI flow
Map 8: Low boost VALET / Safety map
We suggest all vehicles email in or post a log on map1 so we can confirm all is well BEFORE attempting to run higher power maps.
User Adjustments
While there are several user adjustable parameters, for now we only want customers to adjust the boost by gear settings. These are critical to improving traction off the line and something no other C63 tuning system offers, so take advantage of them! Enter the amount of boost to reduce per gear. For example, entering 3psi in 1st will reduce 1st gear by 3psi regardless of the performance map selected. We suggest values of 4psi in 1st gear, and 2psi in 2nd gear, to start. Most vehicles will not need to limit boost in 3rd gear.
Optional BCM (Boost Control Module)
The JB4 attaches to the manifold TMAP, chargepipe MAP, and fuel pressure connections on each side of the engine, for six total connection points plus OBDII for CANbus. These fundamental attachments provide the JB4 with a wide range of tuning adjustment. For vehicles targeting very high boost levels using heavy bolt modifications, WMI, larger turbos, and/or very high octane, additional wastegate dutycycle may be beneficial in driving boost up to the higher target. To increase wastegate dutycycle the BCM add on harness is required. Although not currently available it will be $199 and plugs in to the JB4 harness and the boost control solenoid under the vehicle for direct wastegate control.
V4:
1) Various minor tuning changes
2) Increased sampling rate for smoother performance
Default Settings:
How to update firmware:
For firmware updates if having issues we suggest you turn off WiFi, change upload timeout to 25, and set your phone next to JB4 box under the hood.
Download firmware using the new JB4 Mobile firmware database or externally by clicking this link.
Track Results:
Dyno Results
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