With staged injection, a second set of injectors joins in once engine load passes a set point. That point is the Staging Load Bar on the Fuel Setup page. The Staging Indicator gives you an output that tracks this. It switches on when load rises past the staging point and stays on until load falls back below it.
What to know before you use it
- It needs staged fuel. If staged injection isn't enabled, the output never switches on.
- There's nothing to tune. Assign the output and it works. It has no tables or thresholds of its own, because it simply follows the staging point.
- It's a steady on/off signal, not an injector pulse. It doesn't fire in time with the injectors. If you need an output that pulses like an injector, for example to drive extra injectors, use the Extra Injector output type instead.
What people use it for
The most common use is a dash light, so the driver or tuner can see exactly when the secondaries are working. That's handy when checking the transition point on the dyno. It can also switch a relay for something that should only run while the staged injectors are active, such as an additional fuel pump. If you use it that way, remember the pump only starts at the same moment staging begins, so log fuel pressure through the transition and confirm it holds up.
Setting up the staging itself? See Injection Staging, and Staging Indicator Wiring for assigning the output.
