Burger Motorsport JB4 Performance Tune – BMW S55 M3 / M4

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.

Remember the JB4 does not require any additional modifications or previous stages. Simply install the JB4 as your first and only modification and enjoy an entirely new fast and smooth racing experience. The JB4 also does not require any user setup or customization but we strongly suggest the BMS DATA cable so you can load free software updates.

JB4 Map Guide

MAP	Description
Map0	Disable JB4 / Full Pass Through Mode
Map1	Stage1 map adding approximately 40whp and 40wtq across the power band on pump gas. Suitable for all stages and fuel mixtures
Map2	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
Map3	Slightly less aggressive version of map 1 intended for vehicles running on lower grade fuels such as 91 octane
Map4	OEM performance but with JB4 active for diagnostics only
Map5	//M low torque / linear throttle map
Map6	Custom tuning map
Map7	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
Map8	Methanol injection map. Requires BMS FSB controller or methanol kit for progressive mapping and safety systems.