Getting Started
AB Racing Line analyses your iRacing telemetry and gives you corner-by-corner coaching from an AI race engineer. Here's how to go from a fresh install to your first report.
Log into your account at alienblade.co.uk/racingline/account, then click Download AB Racing Line. Run the installer and follow the prompts — it takes under a minute.
Launch the app and sign in with your AB Racing Line email and password. Your login is remembered — you won't need to sign in again unless you sign out manually.
Click Load IBT in the top bar, or drag and drop any .ibt file onto the window. IBT files are saved automatically by iRacing after every session — you'll find them in Documents\iRacing\telemetry\.
The app detects all clean laps, analyses your inputs against the telemetry, then calls the AI coaching engine. The full report is usually ready within 15–20 seconds. A spinner in the Engineer Report tab shows progress.
Overview Tab
The Overview tab gives you a top-level picture of your session — your scores, your driving style, and where you're leaving the most time on the table.
Overall score (0–100)
A weighted composite of your braking consistency, apex precision, and throttle application across all clean laps. 70+ is solid. 85+ is very good.
Potential improvement range
How much lap time is estimated to be available if you act on all the coaching advice. Split into Technique gain (your inputs) and Setup gain (your car).
How you drive
Braking style (Trail Braker / Threshold / Conservative), throttle style, risk profile, and consistency label — derived from your telemetry, not self-reported.
Six-axis skill chart
Full Throttle %, G-Circle Utilisation, Coasting, Throttle Acceptance, and more. Hover any dot for a plain-English explanation of what that axis means.
Corner Table
Every corner in the session has its own row. The columns tell you what's happening at each one:
| Column | What it means |
|---|---|
| T# | Corner number around the track (T1, T2 …) |
| Dir | Left or Right turn |
| Avg Apex | Average speed at the apex across all clean laps |
| Brk σ | Braking point scatter in metres — how consistent your brake points are. Lower is better. |
| Spd σ | Apex speed scatter in km/h — how repeatable your cornering is. Lower is better. |
| Trail % | How often you trail the brake through the apex on this corner |
| Score | Corner score 0–100, colour coded green/amber/red |
| Δ | Score change vs your last session at this track. Green = improved, red = regressed. |
| Priority | HIGH / MEDIUM / LOW badge if the AI has a recommendation for this corner |
Telemetry & Map
See exactly what your car was doing on every metre of the track. Compare laps side by side, zoom into sectors, and overlay a reference lap from Garage 61.
Select and compare laps
All clean laps are listed on the left. Your best lap is highlighted in pink. Red laps with a ⚠ symbol had an incident and are excluded from analysis. Use the COMPARE dropdown to overlay a second lap.
Speed colour-coded racing line
Your racing line rendered over a real map. Corner markers pulse with priority colours — red for HIGH priority, amber for MEDIUM, green for LOW. Click any corner to read the AI coaching note for it.
Speed, Throttle, Brake, Gear
Five channels plotted against track distance. Primary lap in green, compare lap in pink. Drag to zoom in on a section, right-drag to pan. Click Reset View to return to the full lap.
Click any sector to zoom
The sector strip above the plots uses colour coding: purple = all-time personal best, bright green = session best, yellow = other. Click a sector to zoom both the map and traces into that part of the track.
Map Styles
Use the dropdown in the top right of the map panel to switch between four tile styles:
| Style | Best for |
|---|---|
| Dark | Default — dark themed, matches the app. Cleanest view for the racing line overlay. |
| Satellite | Real aerial imagery. Useful for understanding track geography and runoff areas. |
| Street | Road map style. Good for street circuits where the track follows real roads. |
| Terrain | Topographic map. Useful for elevation context on hillside circuits. |
Compare Charts
When a compare lap is selected, two additional charts appear below the map:
- Line distance — how far left or right the compare lap's line is versus yours at every point around the track. Positive = compare car is to the left.
- Time delta — cumulative time gap between the two laps. The line dips when the compare lap is faster, rises when it's slower. Green fill = you're ahead there, red = you're behind.
Engineer Report
The AI coaching output. Every recommendation is grounded in your actual telemetry data — no generic advice, no guesswork. Here's how to read it.
Top 3 Actions
At the top of the report are three cards — the single most impactful action in each category:
Highest priority corner advice
The corner recommendation the AI considers most likely to move your lap time. Act on this first.
Top car setup change
The single setup change with the most impact for your driving style at this track.
Driver coaching flag
A metric-based observation about your inputs — coasting %, full throttle %, G-circle utilisation, or throttle acceptance at high-speed corners.
Corner Cards
Each corner with a coaching note gets its own card. The priority badge tells you how much lap time is at stake:
Your Car Setup
A mirror of your iRacing garage, driven directly from your IBT file. Every parameter the app recommends changing is shown in green alongside its current value. No guessing which screen to go to — it matches the iRacing layout exactly.
Tyres / Aero, Chassis, Dampers
Tabs mirror the sections in the iRacing garage. Parameters are laid out in the same left/right pairing — Left Front and Right Front side by side, just like in-game.
Recommended changes
Any parameter with a recommendation shows a green arrow and the suggested value. Only parameters that need changing are highlighted — everything else is shown as-is.
Why this change?
Click the cyan ⓘ next to any recommended change to open a side panel explaining the physics reasoning behind the suggestion.
Apply this one second
Some changes interact with each other. A DEFERRED badge means the simulation engine flagged a conflict — apply the other recommended change first, then come back to this one.
Physics & Balance Analysis
The fourth tab in Your Car Setup is the balance and simulation view. It shows the predicted effect of applying all recommended changes together before you touch the garage:
| Card | What it shows |
|---|---|
| Predictive Simulation | Current vs projected ride frequency, roll stiffness, and brake bias against target windows. Green = in target, red = out. |
| Balance (Telemetry) | Whether your car is pushing or snapping based on measured yaw rate data — entry oversteer, exit understeer, etc. |
| Dampers (Telemetry) | Low-speed vs high-speed damper zone analysis from your shock velocity data. Identifies whether your dampers are handling bumps or driver inputs correctly. |
| Dampers (Style) | Damper tuning direction based on your driving style — trail brakers, aggressive throttle drivers, and smooth drivers need different damper behaviour. |
| Balance Check | A final system-wide consistency check across all recommended changes. Flags contradictions and confirms safe combinations. |
Settings
Click the gear icon in the top bar to open the settings panel. It slides in from the right and stays open until you close it.
Units of Measurement
Choose Metric, Imperial, or Custom. The change applies instantly across every tab — telemetry traces, corner table values, setup parameters, time gain card, everything.
| Group | Metric | Imperial |
|---|---|---|
| Speed | km/h | mph |
| Distance | metres | feet |
| Temperature | °C | °F |
| Pressure | kPa | PSI |
| Fuel | Litres | US gallons |
| Weight | kg | lbs |
Account
Opens your account portal at alienblade.co.uk/racingline/account — view your subscriber number, billing date, and manage your Stripe subscription.
Signs you out of this device. The app will show the login screen next time it launches. Your session history and learning data are kept locally and will be there when you sign back in.
FAQ
Common questions from the community.