Race Engineer tracks fuel and caution status together to compute a real pit window — not just a single lap, but the earliest you can safely stop and the latest you still can.
Once a stop is needed, Race Engineer computes a window: the earliest lap you could pit, the latest lap it's still safe to, and the recommended lap in between. The window opens a few laps before the deadline, so you have room to react to traffic or a better opportunity — instead of a single lap number that's either right or already too late.
The pit window combines two signals: your fuel prediction and whether a caution is currently active. Tire wear and pace are not part of this calculation yet — the fuel-and-caution window is what's implemented and validated today; a fuller strategy that weighs tires and pace together is planned, not shipped. This page describes what the app does now, not what it will do later.
When a caution flag is active, that's reflected directly in the recommendation shown to you — a pit call made under caution is a different decision than the same call under green, and Race Engineer doesn't treat them the same.
At very low fuel margins, the window calculation can disagree with itself by a lap or two — a known edge case in lap-integer math. Race Engineer resolves that by trusting the fuel prediction that already said a stop is needed and recommending you pit this lap, rather than leaving you with no window and no action at the exact moment it matters most.
Not yet — today's window is built from fuel and caution status only. Tire-aware strategy is planned but not implemented; this page only describes what currently ships.
Three lap numbers: the earliest lap you could safely stop, the latest lap it's still safe to, and a recommended lap in between — not a single "pit now" moment with no context.
Yes — an active caution is factored directly into the strategy decision shown to you, not just noted separately.
Then there's no pit window at all — Race Engineer only computes one once the fuel numbers say a stop is actually needed.