https://docs.emtronaustralia.com.au/engine-management/functions/gearshift/gear-cut-ign-retard-mode/index.htmlGear Cut Ign Retard Mode Applies the Ignition Retard as either an Offset or Percentage of Current Ign Angle Example: Current Ignition Angle = 20.0 BTDC Offset = 15.0 Deg Retard. Ignition Angle during Gear Cut is = 20.0 - 15.0 = 5.0 Deg BTDC Percentage = 50.0 % Retard. Ignition Angle During Cut : = 20 - 50% x 20.0 = 10.0 Deg BTDC 0: Offset 1: PercentageHugoen-us