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 vehicle performance through these connections making your vehicle much faster.

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 between your car's sensor and its DME/ECU (computer) and manipulates vehicle performance through these connections.

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 for optimal performance and reduced turbo lag.

2023年9月19日 · 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 upgraded hybrid turbo's on JB4 only supra's. This was more common before the Femto Evo unlock of course.

2021年5月11日 · 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 FAQ for addl info. Resets to 93 octane level adaptions when selected and adjusts itself up or down from there.

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 through these connections making your vehicle much faster.

2025年1月29日 · 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. The JB4 has two modes of boost control, which is how it achieves power gains.

2018年4月14日 · 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 accomplish.

2017年9月7日 · 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 be used with 91US octane. The typical power gains on this setting are 55hp and 60ft lb. Higher power levels are achievable using the various maps as seen lower down. 1.

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 are not normally available.