NefMoto

  In my project I have a lean mixture in the second bank at WOT (about 10% compared with the first bank). For example Bank1= 10.6 AFR, Bank2 = 11.3 AFR. These conclusions on indications of wideband lambdas and on voltage narrowband probes. And indirectly on the larger retard values in the second bank. Swapped wb probes - the same effect.
  I have 1.9 boost peak at WOT, and 740cc(4 bar base pressure) injectors with 2 walbro inline. Fuel pressure is normal - stable 5.9 at 1.9 bar boost. In my opinion there is high frequency pressure pulsation in the rail at high flow. And the flow area of ​​the serial connected 6AN-fuel rails is not enough for equally supply both banks. This is confirmed by the fact that with a smaller boost delta AFR is less or null.
  Injection times TI_W and TI2_W are always equal by logging. I decided to consider the option of adjusting the injection time of only one of banks. According to RKTI it can only be corrected by changing relative fuel mass(RK_W and RK2_W from GK modul) which depend on "Lambda controller output"(FR_W,FR2_W in LR), Lambda limitation and other functions. If the injection is separate by banks it means that we can influence it. But I searched and could not find the other bank divisions except catalysts heating , sensor diagnosis and other useless functions. Has anyone studied this issue?

Of course I can change the fuel supply to the rail, but this issue still interesting.

Look at KFBS

yes, I looked it. As I understand it is a factor of balance between banks. Setting there for example 0.1 will multiply relative fuel mass by 0.9 bank2 and simultaneously multiply by 1.1 Bank1. I'll try it. thanks

How about turning off independant bank trims?  Have an idea on how to achieve that?