MoTeC i2 Pro Cheat Sheet

A trackside quick-reference for analysing laps in MoTeC i2 Pro. Everything you need for a professional-level HPDE debrief — the workflow, the channels that matter, and how to turn traces into faster laps.

Workflow

Retrieve logged data over USB or telemetry, open the .ld file in i2 Pro, select a main lap plus overlays, then analyse speed, throttle, and brake traces before debriefing the driver.

Key Channels

GPS speed shows where lap time is made — mid-corner minimum speed is the number to chase. Throttle position reveals hesitation, brake pressure shows whether you are threshold braking or trailing, and steering angle exposes corrections that signal a lack of confidence.

Maths Channels

Derived channels like gSum (the square root of lateral squared plus longitudinal squared) show total combined G on the tires. Binary cornering and braking indicators help isolate exactly where inputs happen, and i2 computes them on demand so they never slow load times.

The G-G Diagram

Plot lateral G against longitudinal G to see the traction circle. A full circle means you are blending braking into cornering (trail braking); gaps and a diamond shape mean you are braking, releasing, then turning — leaving grip on the table.

Keyboard Shortcuts

i2 is driven by function keys and single-letter shortcuts: open logs, toggle overlaid or tiled traces, cycle report views, zoom into corners with the scroll wheel, and step the cursor through the data one sample at a time.

Reading Data Patterns

Flat speed with no brake and no throttle means coasting — brake later and trail in. Wavy mid-corner throttle means uncertainty about grip. A sharp brake with a smooth diagonal release into turn-in is what good trail braking looks like.