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2015+ M3/M4 S55 JB4
Applications:

BMW M3
• 2015+ F80 M3

BMW M4
• 2015+ F82 F83 M4, M4 GTS

JB4 performance tuner F chassis M3
 
Take take your turbo M3/M4 to the next level
The ultimate tune for your S55 powered vehicle, the JB4 allows you to go from factory stock to full race, and everywhere in between, with the push of a button on your steering wheel. The JB4 installs and removes easily and includes many unique features not found in any other tune including user adjustable 1st and 2nd gear boost limiting, map switching in dash, electronic wastegate control, ethanol fuel support, and built in advanced CANbus based diagnostic tools. Installation is completely removable with no splicing or cutting of factory wires.

For the latest performance results, updates, firmware, and map guide be sure to visit N54tech.com.
 
   
S55 M3/M4 JB4 Map Guide
Map 0: Disable JB4 / Full Pass Through Mode
Map 1: Stage1 map adding approximately 40whp and 40wtq across the power band on pump gas. Suitable for all stages and fuel mixtures.
Map 2: Slightly more aggressive version of map 1 intended for vehicles with exhaust modifications and 93+ octane fuel. Can also be used with E85 and racing fuel mixtures.
Map 3: Slightly less aggressive version of map 1 intended for vehicles running on lower grade fuels such as 91 octane.
Map 4: OEM performance but with JB4 active for diagnostics only.
Map 5: //M low torque / linear throttle map.
Map 6: Custom tuning map.
Map 7: Race gas map. Requires 100 octane unleaded fuel and for the fuel mass connector to be installed. This map can also be used with up to 35% E85.
Map 8: Methanol injection map. Requires BMS FSB controller or methanol kit for progressive mapping and safety systems.
   
S55 2015 M3 Motor engine tuned JB4 with BMS intake



 
M3/M4 S55 Dyno Results
S55 F80 M3 Dyno F82 M4 dyno stock vs tuned S55 BMW Jb4 Tuner stock BMW S55 M4 Pure turbo upgrade Jb4 tuned
   
ZCP map 2 vs stock dyno  
 
2015 M4 DCT, 100% stock except for JB4 and 5 gallons of E85 mixed with 91  
BMW M3 M4 Dyno Jb4 tuned
   
Change maps on the fly JB4 S55 CAN flap demo
 
 
2015+ M3/M4 S55 JB4

$799.00 + Free Shipping in USA

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M3 M4 JB4 tuner ecu price lease 0-60 gts flash
Optional BMS Data Cable for diagnostics and updates
This proprietary DATA cable connects the JB control box to your laptop for use with our new datalogging, tuning, and map loading software. More info here.

$35.00

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JB4 N54 bmw performance parts tuners chips
Optional JB4 Smart Phone Wireless REV3 for diagnostics and updates
The JB4 Connect Kit (Rev 3) allows your Bluetooth 4.0 compatible iOS and Android devices to connect wirelessly to your JB4 with optional software. More info here.

$140.00

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By purchasing this item you agree to the Terms and Conditions.

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