JB4 is a plug & play chip tune for turbocharged vehicles. The JB4 comes preloaded with custom tuning software and up to 8 maps for various fuel and modification levels. The JB4 installs between your car's sensor and its DME/ECU (computer) and manipulates vehicle performance through these connections.

The JB4 features CAN-Bus connectivity for more advanced tuning, direct AFR control, advanced safety systems for boost, air/fuel ratio, fuel trims, engine knock, boost mapping by gear for improved traction, integrated water/meth control, and much more.

2023年6月14日 · CANbus/OBDII connector: green/brown wires on JB4 Vehicle can now be unlocked, and doors opened as OBDII can be installed/connected with vehicle awake. This optional connector attaches to the OBDII port to allowing the JB4 to take in additional advanced engine parameters to incorporate in to tuning and logging via the app.

2024年5月29日 · I have just installed JB4 and waiting to receive the CAN Bus cable to select map2 for my 2020 840xDrive GC. Could someone kindly point me to the download needed to select maps via laptop. Thanks in advance

2022年1月9日 · Facts on the JB4: The JB4 (and the Heico e.motion) also plugs in to the CAN bus data network. CAN bus interface allows monitoring all engine data. Safety and tuning ability are greatly improved. Personally I would not consider a piggyback option that does not interface with the CAN network.

2022年5月23日 · Hey guys, as promised here is a fairly comprehensive guide for installation of the JB4. This was my most recent install in my 2022 G series M240i (B58). Hope this helps someone out.

I finally had a few spare moments to update the JB4 interface user adjustment page. Just some minor changes adjusting field names, and adding a new position for the upcoming 3rd gear boost limiting. The logs made in this interface are compatible with older interfaces and older logs are compatible with this interface.

The JB4 features CANbus connectivity for more advanced tuning, direct AFR control, advanced safety systems for boost, air/fuel ratio, fuel trims, and engine knock, boost mapping by gear for improved traction, integrated water/meth control, and much more.

The JB4 Tuning Box from ScienceofSpeed allows you to extract 40-100 horsepower gains from your NSX! By intercepting engine pressure sensors and monitoring engine parameters through the factory CAN bus - the JB4 Tuning Box intelligently increases engine output while maintaining the factory ECU's fuel, ignition, and engine safety strategies.

2017年7月10日 · You will need the JB4 serial cable (normally purchased separately) which you can feed through the door seals and connect it up to your laptop (with JB4 app free) or use smartphone/tablet (with JB4 app purchase).