How gear switch detection counts gears
The Gear Switch settings only appear in NSP when the Gear Detection Type in the gear detection function is set to Gear Switch. In this mode the ECU keeps a running gear number. Pressing the clutch switch long enough sends it back to 0, releasing the clutch takes it to 1, and each gear switch event after that adds one. It's a simple, sensor-free approach that suits cars that only shift up during a run, such as drag cars.
The three timers
| Setting | What it does | Our advice |
|---|---|---|
| Gear Switch Reset Time | How long the clutch switch must be active before the gear number drops to 0 | Longer than a normal shift, so a quick clutch stab mid-run doesn't wipe the count |
| Clutch Release Time | How long after the clutch switch turns off before the gear number steps from 0 to 1 | Long enough that a slipping launch or a bounce on the switch doesn't trigger it early |
| Gear Switch Debounce Time | After the gear number goes up by one, how long before another increase is accepted | A little shorter than your fastest real shift, so switch bounce can't count as two gears |
Checking it
Log gear number alongside the clutch and gear switch inputs for a few runs. If one shift counts as two gears, lengthen the debounce; if real shifts get missed, shorten it. If the count resets mid-run, lengthen the reset time. If you need a gear reading that also follows downshifts, look at gear position sensing instead.
