The factory 135i, 335i, 535i, and Z4 35i ECU comes detuned from the factory and the full potential of the N54 twin turbo engine is inaccessible. That has all changed with the introduction of the BMS JB4 processor. The JB4 is the latest generation of the Juice Box Performance Tuner and it features completely new microcontroller based hardware, numerous input/output channels, and integrated safety features. Also, the 1.3 version improvements include crank position for full 4D engine mapping, air intake temperature for on the fly thermal loading adjustments, direct solenoid control for precise spike free boost control, throttle input for factory like drivability, and fuel pressure control for diagnostic invisibility. Basically, the JB4 provides safe, reliable increase in horsepower and torque. With over 15 unique maps to choose from (stock maps to race maps), this is the only performance software you will ever need for your N54 equipped BMW. Moreover, map changes can be made while seated in the driving seat! Whether your vehicle has an intake or is fully modified, the JB4 will adjust to the modification and make the most out of it. The JB4 is available in either the pinout ($349) or plug and play version ($579) for easy install. All this and more makes the JB4 the #1 software choice for the fastest 1 series and 3 series in the world. When it comes to choosing the best performance software for your 135i, 335i, 535i, Z4 35i only settle for the best : BMS JB4. THIS RACING PART IS ONLY TO BE USED WITH COMPETITION RACE VEHICLES OPERATED ON A CLOSED COURSE Benefits
Applications
2.0 Datalogging Cable (optional) Click here for the latest 2.0 firmware, interface software, and directions. Click here to see the fastest 335i 1/4 mile time using the JB4 Click here to see the fastest 135i 1/4 mile time using the JB4
JB4 USB 2.0 6 Datalogging Cable This proprietary USB cable connects the JB4 G3 control box to your laptop, for use with 2.0s new datalogging, tuning, and map loading software. Cable may be left in engine bay and routed in the window or door when needed for a simple install. Alternatively it may also be routed behind the ECU in to the glove box for a clean install and on the fly access. JB4 must be equipped with a G3 box. Please do not attempt to use a standard RS232/USB cable with the JB4 as it will not work and may damage the processor. |