Each car/driver keeps its own runs, baseline, combo and crew notes. Weather is shared — same air for the whole pit. Switching is instant; nothing is lost.
Beta Feedback0 tap to open
Testing this build? Drop your notes here — every entry is saved and reviewed. Thanks for helping dial this in.
Weather Station
Type a location and fetch — temp, humidity, barometer, elevation and wind fill in automatically and stay editable.
Use a trackside weather meter for best results. If pulling from a weather app, keep Sea-level corrected selected and enter track elevation.
Swing factors — what could move this number either way
How these two models work — and how the final number is picked
Run Log
More slip fields (R/T, 330')
| Date | ET | Δ Pred | MPH | 60ft | R/T | 330' | Dial | Result | DA ft | Temp | RH% | Baro | Grains | Wind | Trk°F | Notes |
|---|
Batch entry: Import CSV loads many runs at once — one row per pass, each with its own weather (temp/rh/baro, or a da column directly), so historical logs land with the correct air and the math stays honest. Grab the template for the exact format. Rows without air data are skipped, exact duplicates are ignored, and imports never fake a prediction score.
Every logged run is checked against what the app predicted right before that run — the Δ Pred column and Model Accuracy tile track how close the calls are getting. Runs logged before this feature show —. The data model fits ET vs density altitude across your log — the more runs, the sharper the prediction. Chart: ET vs DA with fitted line.
Race Report & Analytics
The full picture on demand — trends, predicted-vs-actual charts, findings, coaching, readiness, and your own notes. Always built from whatever is already logged; nothing to type first.
Computed Air
Density altitude is the single best summary number — it rolls temperature, pressure, elevation and humidity into “how high the engine thinks it is.”
Full air analysis (density, dew point, grains, HP correction…)
Live Data Map
What it's for: answering "why is my prediction what it is?" — every number the engine touches, laid out in the order it flows, from what you typed to the final dial. Not something you need every round; open it when you want to see the model's work or explain a call to someone. Tap any tile for a plain-English explanation.
Open the full pipeline (20 values, 4 stages)
What-If Planner
Plan ahead: dial in a scenario — tonight's cool-down, a hotter final round, wind picking up — and see what the engine would call without touching your live inputs.
Quick Reference
What it's for: a zero-typing glance table — no presets to tap, no numbers to enter. Print it or screenshot it for the staging lanes. (Want to test a specific scenario instead — tonight's temp, a headwind? Use the What-If Planner below; it answers any question, this just shows the common ones at a glance.)
| Density Alt | vs Now | Predicted ET | Dial |
|---|---|---|---|
| Set a baseline (log a pass) to build the ladder. | |||
Air improving through the evening → your dial walks DOWN this table. Air getting worse → walks up.
Also show: what each condition costs this combo
| Change | Effect on ET | New Dial |
|---|---|---|
| Set a baseline (log a pass) to compute sensitivities. | ||
Combo Setup
Advanced tuning coefficients
Set the track heading (compass direction the car travels) and fetched wind auto-splits into head/tail component — no guessing at the flags.
Induction sets how sensitive the combo is to air — boosted cars self-correct for thin air, NA cars feel all of it. The advanced coefficients are tunable once you have data; leave track temp at 0 until the log shows a trend.
Baseline Run
No baseline yet — log a pass below and it fills in automatically.
The baseline is your reference pass — every physics prediction scales off it. In Auto mode it follows the last run you log; tap ★ on any logged run to baseline that pass instead.
Admin Journal0 device-local · tap to open
Owner's log — decisions, ideas, follow-ups, anything to review later. Stays on this device (not part of the client-facing report unless you copy it in).
Not connected — data lives only on this device.
Create a code once, paste it on the other phones — runs, settings, feedback, notes and journal stay in step across devices. Changes push automatically a few seconds after you make them. Treat the code like a key: anyone who has it can see and change team data.
Backup saves runs, settings, feedback, notes and journal to one file — still smart after every race day, even with sync on.
Parameters In The Model
| Parameter | Effect on ET | How it's handled |
|---|---|---|
| Air temperature | Hot air = less oxygen = slower | Density + HP correction |
| Humidity / dew point | Water displaces oxygen | Vapor pressure subtracted from dry baro; grains shown for methanol tuning |
| Barometric pressure | Higher = denser air = faster | Station or sea-level corrected input |
| Elevation | Thinner air up high | Folded into density altitude |
| Wind | Headwind slows, tailwind helps | Direction-weighted, tunable coefficient |
| Track temperature | Traction window — nonlinear | Optional linear coefficient, logged per run |
| Induction type | Boosted combos shrug off bad air | Sensitivity multiplier on air correction |
| 60-ft times | Launch consistency check | Logged per run for diagnostics |
Now live: location-based weather fetch (Open-Meteo model + precise elevation) with auto head/tail wind split via track heading. Future candidates for the full build: on-site weather-station hardware feed, auto-refetch on a timer, tire pressure & compound, converter/trans temp, throttle-stop timers, fuel specific gravity, lane-by-lane track prep history, and per-car profiles with cloud sync.