I lowered 20A to 17A - iracing ffb to 48 - fuv 30 - everything is okay - no under voltage issue - thx the support
I use Tomo’s drc for large mige
He uses specific values for mr and ml in granity. I used to believe that thy are better. I now preffer using the tool to determine those values https://granitedevices.com/wiki/Measure_motor_resistance_and_inductance_in_Granity