This brief article explains the importance of using a JB4 even if your BMW is already Flash Tuned. It specifically explains N54 applications but it mostly applies to all engines.
1- Advanced Safety system
- If boost exceeds your safety settings, the JB4 reverts to the stock map
- If AFR is too lean (15% variance), JB4 reverts to the stock map
- Extra safety for Port Injection and WMI
2- Absolute Boost Control System
- JB4 targets an absolute boost level where boost is always the same (Independent of external factors)
- JB4 has ability to set max boost per gear
- JB4 automatically tunes Wastegates and fuel trims
- Autotune maps that gives max safe power based on mods, fuel, and IAT (Intake Air Temperature)
3- On The Fly Changes
- Boost Levels
- Max boost per. gear
- Gauges
4- Better Feedback for the Driver
- Ability to change ANY settings, map, gauges using the JB4 app (on phone) without the need for laptop connectivity
- Ability to monitor real time boost, AFR timing, knock, and meth flow
- Ability to data log and email it to BMS using the mobile app (without the need for any cable)
- Ability to record data, 250x per second
5- Complete Tuning System
- Eliminates need for additional modules
- No lift shift
- 2 step
- Anti-Lag
- Port Injection Control
- Flex-Fuel sensors
- Water/Methanol Control
- Ability to work as a cohesive unit rather than have multiple modules working separate
6- FREE Upgrades and Support
- Lifetime Firmware Upgrades and Backend Flashes
- Free support from the BMS team
7- No Change In DME
- All DME table values stay intact
- JB4 adds performance and safety while keeping DME 100% in charge
Thank you to 'BMW Fanatic' on YouTube for the awesome explanation!