Can someone help me to understand JB4 Backend Flash?

ysjeon1698

Specialist
Dec 1, 2016
79
14
0
29
Texas
I just got JB4 G5 backend flash (MHD)

I read about it from the bimmer post and other area that JB4 controls the boost and MHD controls the timing.

After flashing the ECU, do I need to set up something? or does it automatically changes the timing?

How and what does Backend flash do to my car anyway? I am on Map 5 at the moment.

Thanks.


Car: 2011 N54 335IS (FBO without inlet/outlet)
 

Kervio

Private
Jan 7, 2017
43
15
0
To utilize the BEF, you must flash a special BEF map otherwise the jb4 + MHD won't work together.