How much power does JB4 add?

How much power does JB4 add?

In short: yes. A general rule of thumb is 10hp for every 1 psi of boost added.

What does FF mean in JB4?

FF/WG adaption adapts and learns over time, any value between 1-150 means JB4 “feed forward” function learning is still active. Reset the value to 60 and it may learn down after a while. If you are dropping RS3’s, your car is running fine.

Can you custom tune with JB4?

With a JB4 you can change performance profiles or revert back to factory tuning in real time using your smart phone, and in some cases in the dash directly.

Is JB4 a piggyback?

JB4 is a piggy back system for tuning, basically controls engine paremeters from the ECU to the Engine. Its a rather dirty but functional way to tune a car.

What is duty bias on JB4?

Duty Bias: The new user adjustment fields which allow adjustment of the FF Curve by RPM.

What does WGDC mean?

Again the shape of the wastegate duty cycle (WGDC) shows us that while the system is efficient up to 5500 RPM, there is some sort of restriction beyond that point. The wastegate duty must rise very quickly in order to maintain that boost pressure to redline.

How do you read a JB4 graph?

A JB4 calculated value with a range of 0 – 6 that represents the average amount of timing below the maximum possible curve over a short term window. Lower values indicate a higher overall ignition advance while higher values indicate a lower overall ignition curve.

What is WGDC?

What should wastegate duty cycle be?

The stock system runs 100% duty up until 2500rpm, then tapers it down to 44% at redline. It can vary the duty cycle up to about 10% to target the desired load number.

What is duty cycle on boost controller?

The duty cycle is a calculated a percentage of time the solenoid is actually open. Meaning 50% DC (Duty Cycle) means the solenoid on for 50% of the time, and 100% means the solenoid is on all the time.

Can a dealer detect JB4?

Actually according to jb4, if it’s installed and uninstalled correctly each time. The dealership would have no way of seeing any tampering. Bmw will detect your JB4 if they dig deep enough.

What is Pre boost JB4?

Pre-boost – The boost pressure that is measured. PWM – This is the amount of extra work that the solenoids controlling the turbos have to do to acheive the target boost. ECU Psi – To prevent the ECU creating error codes for high boost levels, the JB4 tells the ECU that the boost is lower than it is.