The Flat Shift Cut Percentage table sets how much of a cut the ECU applies during a flat shift to pull torque down so the gear can change with your foot still flat. It only appears when Flat Shift Mode includes a fuel cut, an ignition cut or both. You can map it in up to 3D, as an 8x8 table, so the cut can change with two channels you choose, such as RPM and gear.
You need it whenever cuts are part of your flat shift strategy. Too little cut and the gearbox fights the shift; too much and the car stumbles or the shift feels harsh. Start moderate and adjust from logs, checking shift time, RPM drop and how cleanly the engine recovers. It works alongside ignition retard and recovery time, and needs the input set up in flat shift wiring.
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