RERace Engineer
Feature

Automatic Pit for iRacing.

Race Engineer can set the fuel for your pit stop by itself. The amount is worked out again every lap, and only set when it is safe.

Race Engineer's pit call over iRacing: an overlay reading PIT THIS LAP, shown when the pit window opens.
Pit call overlay, over iRacing

What it is

When Automatic Mode is on, Race Engineer sets exactly how much fuel to add at your next pit stop, based on your actual fuel burn. It never touches steering, throttle, brakes, or any other input. Two lighter modes exist for anyone who wants the numbers without the automation. Observation only reads and displays telemetry. Assisted recommends a fuel amount for you to enter yourself.

How it works

Race Engineer reads iRacing's telemetry SDK continuously: fuel level, lap distance, session state. Every lap it recalculates fuel-to-end from your measured burn rate and checks it against the pit window. When a stop is recommended and Automatic Mode is on, that fuel amount is sent as a pit command. It is sent only after it clears every safety check below. This is pit automation in the narrowest sense, on purpose: one number, sent once, only when it is safe to.

Safety

What has to be true before it acts

Before setting the fuel, Race Engineer checks everything below. If any of it fails, it does nothing and logs why:

  • iRacing is actually connected, and the session state is valid for a pit command
  • There is a strategy worked out from your laps
  • The recommendation is to pit this lap
  • The fuel amount is positive and fits within your tank capacity
  • The decision is still current. A stale recommendation is never used
  • A cooldown since the last action has fully elapsed

These are the checks the code runs before every command. You can turn automation off from the dashboard at any time, and off means full manual control.

Three modes, your choice

Observation

Reads telemetry and shows the numbers. Makes no decisions and touches nothing. The safest place to start.

Assisted

Shows the fuel and pit-window recommendation for you to act on yourself. Nothing is sent automatically.

This is Auto Pit

Automatic

Adds the Auto Pit behavior on top of Assisted: sets the pit fuel amount for you, gated by the checks above.

Run modes →

Test mode

Try it in a practice session before you trust it with a race.

Test mode invents a race distance inside a real Practice or Test session. Automatic Mode then reaches the point of sending a fuel command within a few laps, instead of a full race. Only the lap count is invented. The consumption, the decision and the command iRacing receives are real. You turn it on from the Test mode card on the Settings page.

  1. Join a real Practice or Test session in iRacing first. Test mode only works where the session has no lap limit and no time limit of its own, so it cannot start during a race.
  2. On the Settings page, open the Test mode card, enter how many laps to simulate (1 to 50) and turn it on.
  3. Run at least one clean lap. The app needs one valid lap of consumption before any recommendation appears.
  4. Pit when BOX THIS LAP shows up, and watch the Add figure in iRacing's own fuel box change by itself.

While test mode is on, the app shows a banner saying so, and how many invented laps are left.

Auto Pit questions

Can Race Engineer change my pit fuel automatically?

Only if you turn on Automatic Mode, and only the fuel service amount for your next pit stop, never any other input. This is gated so it can only act during an actual pit stop.

Does it work during a live race?

Yes. It reads live telemetry throughout the session and recalculates every lap. That includes during a live race, and not only in practice or a pre-race simulation.

Can I use it without Automatic Mode?

Yes. Observation Mode only reads and displays telemetry. Assisted Mode shows the recommended fuel amount without sending anything. Automatic is opt-in.

What happens if telemetry is lost?

The connection check in the safety gate fails, so no fuel command is sent. Race Engineer stops acting until iRacing is connected and the session is valid again.

FAQ →

Try Automatic Pit in your next session.

Download for Windows