Cosworth Pi Toolbox for iRacing: A Step-by-Step Guide (Now Live)

Cosworth’s pro-grade data tool, Pi Toolbox, now works natively with iRacing telemetry—and iRacers can download and use it for free. That means you can open your .ibt files directly in Pi Toolbox, use pre-built iRacing layouts, and start finding lap time like real-world engineers do.

What’s new: Pi Toolbox is officially available to iRacing users via the Cosworth Members Portal, with native .ibt support and beginner-friendly, preloaded layouts. An optional Pi Toolbox Plus license unlocks deeper, pro templates.

Timing: iRacing announced that access would go live on September 16—that’s today.

What you’ll need

• An active iRacing account and a recent session (so you have a telemetry file to open).
• A Cosworth account (free) to download Pi Toolbox v14 from the Members Portal.

Step 1 — Download Pi Toolbox

1. Go to Cosworth’s iRacing page and click Customer Login to visit the Members Portal.
2. Register or sign in, then download Pi Toolbox v14.
3. Install Pi Toolbox. You’ll get pre-loaded iRacing layouts out of the box.

Step 2 — Make sure iRacing is recording telemetry

1. Launch iRacing and start a session.
2. Press Alt + L (default hotkey) to toggle telemetry logging on.
3. Drive a few laps, then exit the car to finalize the log file.
4. Your file will be saved to:
   Windows: Documents\iRacing\telemetry (filename ends in .ibt).

Tip: If you don’t see any files, check that logging is on (Alt + L) and confirm the folder path. Some tools can clean up telemetry automatically—verify their settings if files “disappear.” LastTenth

Step 3 — Open your lap in Pi Toolbox

1. Launch Pi Toolbox.
2. File → Open, navigate to Documents\iRacing\telemetry, and pick your latest .ibt.
3. When prompted, choose the iRacing layout/workbook to load a sensible set of graphs (speed, throttle/brake, steering, track map, etc.).

Step 4 — Set a “reference” lap

• In your loaded session, choose your best clean lap as the Reference.
• Add another lap to overlay it—Pi Toolbox will align the traces so you can compare inputs and speed at each point around the circuit.

What to look for:

• Minimum corner speeds (where you’re slower vs. the reference).
• Brake traces (earlier vs. later, peak pressure, smoothness).
• Throttle application (too early → wheelspin/understeer; too late → lost exit speed).
• Steering trace (unwind timing relative to throttle).
• Entry vs. exit trade-offs (map + traces tell you if you’re over-attacking entry).

Step 5 — Build a quick “first-10-minutes” checklist

1. Speed vs. Distance: Circle the biggest losses vs. reference (delta spikes).
2. Brake + Throttle traces: Note where you can brake later/shorter and commit earlier to throttle without spikes (instability).
3. Map: Mark corners where your line is longer/shallower than the reference—especially in linked corners.
4. Steering vs. speed: Is your minimum-speed timing late? Are you coasting?
5. One change at a time: Pick two corners, set a goal (brake 3 m later / carry +2 km/h min speed), re-run, and re-compare.

Step 6 — Save and reuse your layout

• Save your workbook/layout so you can keep the same panels and channels the next time you load fresh .ibt files.
• As you improve, customize panels (e.g., add longitudinal G, gear, yaw rate, ride/TPMS if available) to focus on the habits you’re changing.

Step 7 — Share data with your team/coach

• Export the workbook and/or share the raw .ibt files so teammates can open them using the same layout.
• Coming later in 2025: iRacing and Cosworth plan live remote telemetry—so engineers/teammates can view data in real time during sessions. Keep an eye on official updates.

Troubleshooting & quick wins

• No telemetry files? Make sure you actually toggled logging (Alt + L) and check Documents\iRacing\telemetry.
• Huge telemetry folder? Delete old .ibt files periodically to keep things snappy.
• Why Pi Toolbox vs. converters? iRacing’s .ibt files open natively in Pi Toolbox—no extra plugins or conversion steps needed.
• Want more depth fast? Consider Pi Toolbox Plus for advanced, ready-made pro templates designed to surface deeper insights with minimal setup.

For the first time, iRacers have official, free access to a tool used across top-tier motorsport (F1, WEC, IndyCar, WRC). It lowers the barrier to real data-driven improvement—whether you’re hunting tenths in fixed setups or dialing in technique for league racing.