Prices: US Dollars
Ready to take your BMW twin turbo to the next level?
How does an additional 80hp and 80tq to the wheels on an otherwise stock car on pump gas sound? How about up to 157hp and 139tq to the wheels on a fully modified car on race gas?
Stage 3 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.
In addition new internal safeguards such as over-boost protection, boost spike protection, and maximum allowable boost solenoid offsets have been incorporated making the JB3 one of the safest tunes available.
Because the JB3 was designed from the ground up specifically for the N54 platform, we were able to optimize the unit for reliability and ease of install.
The JB3 does not require complicated external power or ground taps which can leave tell tale signs of modification or trigger detection codes, making it the only true plug and play N54 system available. And the JB3 box and harness are designed to fit discretely in the ECU compartment with no visible signs of modification.
We've also made installation a snap! JB3 is offered with two wiring harnesses. Plug and play (PnP), and professional (pin-out).
The PNP includes color matched subconnectors and does not require counting/extracting ECU pins. Installation takes only 15-20 minutes.
The pin-out (suggested for more experienced enthusiasts) uses OEM BMW pins in similar manner to JB1 and JB2, and has an install time of 30-45 minutes. Neither version requires the solenoid bypass or any vacuum line changes making removal a snap!
With JB3 software version 1.2 users can now switch maps or disable the JB3 from the drivers seat! All without the hassle of running wires inside the car or carrying around a manual remote control.
Each version 1.2 JB3 is shipped with the following maps:
High Boost Map (aka 1.1v): With boost pressures of 13-14psi and the buttery smooth operation of an unmodified car, this map is suggested for the majority of Stage 3 users. Stock cars can expect gains of up to 80 wheel horsepower and 80 wheel torque, while cars with additional modifications and ideal weather conditions can expect huge gains of up to 120 wheel horsepower and 120 wheel torque. All this on pump gas, with the reliability you've come to expect from BMS. The JB3 is configured to automatically compensate for upgrades to the intercooler, exhaust, intake, and octane, giving you the peace of mind that you're safely extracting as much horsepower as you can for your given conditions.
Low Boost Map: Similar to the high boost map, only peak boost is set to level off at 12-13psi. Intended for those wanting the features and benefits of the JB3 with a more conservative boost curve.
High Altitude Map: Optimized for those routinely operating at 5000' and higher.
Hot Map: A slightly modified version of the high boost map featuring additional top end boost, less air intake temperature boost decay, and more aggressive air/fuel ratios. Suggested for cars with 93 RM2/USA octane and higher fuel.
Race Map: Pure tire shredding power for those running 97 RM2/USA octane fuel and higher. When coupled with high flow mods such as downpipes, intake, and exhaust, huge gains are possible.
Stock map: Reverts to the factory tune for stock performance. Comes in handy when dropping the car off with a valet or letting a friend borrow it. Easy to enable before leaving the car.
Additional maps are always under development and the JB3 can be easily updated at home by installing one of our update chips.
Juice Box Performance Tuner Stage 3 Dyno Testing
Stock 135i, 91 octane
335i with UR downpipes and BMS intake, otherwise stock, 93 octane
135i with Riss Racing downpipes and exhaust, Code3 intercooler, BMS Intake, 100 octane
*** NOTE TO THOSE WITH MARCH 2008 OR LATER BUILD DATES OR ECU UPDATES ***
Starting in March, 2008, BMW introduced new ECU software designed to detect piggyback tuners and limit their torque output. BMS has studied these updates and has developed JB3 maps that do not trigger this detection.