What is a JB4? The JB4 is a plug and play tune available for turbocharged vehicles. The JB4 tuner installs between your car's sensors and its DME/ECU (computer) and manipulates …

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 …

The JB4 is a plug and play Kia / Hyundai tuner that plugs into easy to access sensors in the engine bay and works with your factory ECU tuning to remap your boost, timing, and fueling …

Sep 19, 2023 · JB4 will still obviously be superior in every day if you are trying to maximize power out of a locked car. I personally don't recommend it but there are people out there running …

May 11, 2021 · Boost ranges between 12-17psi based on your cars octane, conditions, and modifications. E85 compatible. If using E85 we suggest around 30% to start. Refer to the E85 …

The JB4 is a plug & play tune available for turbocharged vehicles. The JB4 tuner installs between your car's sensors and its DME/ECU (computer) and manipulates vehicle performance …

Jan 29, 2025 · JB4 works by modifying the MAP and TMAP sensor readings to tell the car’s DME that more (or less) boost is needed. The EWG works the same, but for wastegate position. …

Apr 14, 2018 · I have had the JB4 in my car for 4 months now. I shot a video of my pros and cons list, but will also list it on a thread. I think the JB4 is a great tune for what it was put out there to …

Sep 7, 2017 · The JB4 is a true plug and play tune offering safe and adjustable gains. The unit ships with a base setting in map 1 that increases the boost by +4.0psi over stock that is safe to …

The JB4 is a programmable computer that attaches between the ECU and vehicle sensors allowing it to adjust your vehicle’s tuning by tapping into areas of the factory flash mapping that …