🧪 Dirt Test
Grab some dirt. Hunter tells you what it means.
STEP 1 — SNAP A PHOTO AI VISION
📷 Show Hunter the Dirt
Close-up photo of the dirt. Got mud on your arm from the front row? That counts.
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No camera? Fill out the tests below.
STEP 2 — WHERE IS THIS DIRT FROM?
📍 Source
STEP 3 — SQUEEZE TEST
✋ Ribbon Test
Damp dirt, roll into ball, squeeze flat. How long before it breaks?
STEP 4 — COLOR
🎨 Dirt Color (damp)
STEP 5 — MOISTURE
💧 How Wet?
STEP 6 — GOT TOOLS? (optional)
STEP 7 — WHO ARE YOU?
Tell Hunter who you are
🔧 Crew Chief
🏁 Racer
🏟️ Fan
🎓 Student
📚 Teacher
🧪 Just curious
🧴 Kid with a jar
🌱 Gardener
🔬 Hunter Is Doing the Science
sit tight — this is the good part
📷 Sample received
locking in your data
🧪 Identifying clay minerals
kaolinite • illite • montmorillonite
💧 Moisture-to-grip model
Wismer-Luth equations loading
📊 Comparing 55+ dirt classes
cross-referencing surface profiles
🌡️ Factoring weather
dew point • evaporation rate
🏁 Predicting race-night transition
heavy → tacky → slick timeline
🔧 Writing your dirt report
Hunter is putting it in plain English
0s
✅ Thanks for testing with Hunter.
That was one tool. He has nine.
🔧 Hunter’s Toolbox
🧪
GRIP SCIENCE
Wismer-Luth equations
🌡️
DA JETTING
Density alt → jet size
⚙️
GEAR RATIO
RPM → corner speed
🔄
STAGGER
Tire circumference diff
📐
BANKING
Phone inclinometer
📷
SNAP TRACK
AI photo analysis
💧
MOISTURE MAP
4-corner track walk
— want Hunter to remember you? —
Your Data. His Brain.
The free toolbox runs the numbers. The full Black Book tracks your setup sheets, your tire log, your season stats — and Hunter learns YOUR car.
$4/mo
Pit Pass
Logbook, tire tracking, setup sheets, 1 car
$15/mo
Crew Chief
Unlimited Hunter, video analysis, data export, 2 cars
$50/mo
Team Owner / Promoter
Multi-car, pattern detection, track database, promoter tools, unlimited cars
🏁 7 Days Free
Full Crew Chief access. No card required.
✅ Trial started. Check your email.
— while you’re here —
🐑 FLOCK STAR
Quick racing game. 60 seconds. Clean choices speed you up.
THE JAR TEST
🏺 Got a Jar?
Fill 1/3 dirt, add water, shake 60 sec, settle 30 min.
Bottom = Sand. Track goes dusty.
Middle = Silt. Moderate.
Top (stays cloudy) = Clay. Gets slick.