BMS JB4 Tuner – BMW F8X M2/M3/M4 S55

Description

Gains are up to 80whp/100tq on pump gas and up to 120whp/140wtq on higher octane or E85 mixtures without the risks of flashing!

The ultimate tuner 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 or phone. 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. In addition, installation is completely removable with no splicing or cutting of factory wires.

The JB4 is compatible with the factory flash map, competition package flash map, all off-the-shelf flash maps, custom tuned flash maps, or any flash map you choose to load! For those who don’t mind flashing BMS provides free back end flash maps designed to optimize performance for specific builds and fuels saving you hundreds of dollars and many hours of time on custom flash tuning.

JB4 Features & Benefits

• Gains are 80whp/100tq on pump gas and up to 120whp/140wtq on higher octane or E85 mixtures.
• Improves 0-60 times and 1/4 mile times.
• Preloaded with custom JB4 BMW tuning software and up to 8 maps for various fuel and modification levels.
• Ethanol (E85) compatible tuning maps.
• Able to read/delete fault codes.
• View and record up to 40 gauges/engine parameters in real-time with the JB4 app.
• Boost by gear in 1st, 2nd, and 3rd can be controlled via the JB4 app for a perfect launch.
• Compatible with JB4 Mobile for smartphone logging, tuning changes, and adjustment.
• The JB4 offers a lot more performance, functionality, and safety than your average performance chip.
• Quick Plug & Play Installation.
• CANbus OBDII integration offering unrivaled tuning features and performance.
• Improved performance over non-integrated chip tunes.
• Runs as smoothly as stock, this is how your vehicle should have come from the factory.
• Compatible with all driving modes.
• Fuel economy unchanged during normal driving.
• 91 octane fuel or better required for performance gains.
• Not VIN locked and can be removed without a trace and resold down the road.
• Includes the rugged JB4 billet aluminum enclosure for protection.
• 5 year warranty.

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.

Fitment

• BMW M2: 2018-2022 S55 BMW F87 M2 Competition (S55 engine only)
• BMW M3: 2015-2020 S55 BMW F80 M3
• BMW M4: 2015-2020 S55 BMW F82 F83 M4, M4 GTS, M4 CS