Unlock responsive, repeatable power from your McLaren M838T engine with the JB4 Performance Tuner BETA. This plug and play piggyback from Burger Motorsports integrates with the factory ECU via easy to access engine bay sensors and CANbus, adjusting boost, timing and fueling for stronger performance and reduced turbo lag without the need for an ECU flash. It remains fully compatible with locked ECUs and removes cleanly when required.
- Direct fit plug and play tuning box for McLaren M838T engines including MP4-12C, 570S, 570GT, 600LT and 650S
- No ECU unlock or flash needed, works with locked ECUs
- 64 MHz processor sampling sensors 800 times per second via dedicated 10-bit converters for smooth, consistent power delivery
- Advanced CANbus OBDII integration factors in pedal position, throttle, gear, RPM, AFR, fuel trims, ignition advance and knock
- Built-in safety strategies keep boost low until oil and coolant are at temperature and automatically reduce boost if overheating, running lean, knocking or overboosting
- On the fly map selection via BMS data cable or JB4 Mobile app, with a default Map 1 targeting around 4 psi over stock plus stock and valet modes
- Preconfigured maps for 91 and 93 octane fuels and E85 mixtures, compatible with all driving modes
- Can improve 0 to 60 mph and quarter mile performance while retaining factory-like drivability; fuel economy unchanged during normal driving
- Read and clear fault codes, upgradable firmware and detailed data logging
- Not VIN locked and removes without a trace, ideal for resale or transfer
- Includes rugged billet aluminium JB4 enclosure
- Wireless JB4 PRO smartphone connectivity included for logging, map control and over the air firmware updates
- Designed and assembled in the USA with a 5 year warranty
The JB4 offers a powerful, flexible and safe tuning solution for M838T-powered McLaren models, delivering more capability than typical chip tunes thanks to deep CANbus integration and continuous development with free firmware and map updates. Installation is discreet and reversible, making it a popular upgrade with Nforcd customers who want a fast, reliable performance increase without flashing the ECU. This application is currently in BETA.
Order your McLaren JB4 from Nforcd today. Professional fitting is available at Nforcd in Warwickshire. To request a quote, email Sales@nforcd.com.