Tune Setup
Tell us about your fuel, environment, and tools. Anything you skip falls back to a sensible default — you can keep moving.
P
PROFESSOR
Last stop before we wire you into Scarecrow. Quick run — 30 seconds if you take the defaults, longer if you want to dial it in. Your call.
Sections ready
0 / 5
01
Fuel
What's in the tank — drives stoich math, AFR targets, knock thresholds.
Fuel type
Octane (AKI, R+M/2)
Auto-fills from fuel type. Override if you know better.
Ethanol %
E10 stoich = 14.13 · E85 stoich ≈ 9.87. Slider is live for flex.
02
Climate
Drives IAT and ECT comp curves, plus baro shift on altitude.
Where you tune / drive
Altitude (ft above sea level)
Default 0. Above ~3000 ft expect noticeable VE shift.
03
Emissions
Scarecrow never produces monitor-defeat content — this just sets visibility on the catless KS workflow and similar feature gates.
Scope
04
Measurement hardware
No wideband ⇒ Idle-Fuel and several other subsections will halt — but Idle-Airflow, fan setpoints, and IAC work fine without one.
Wideband O2
Wideband present
Configuration
Brand
How it's logged
Knock ear present
EGT probes
EGT present
Count
Location
Boost gauge
Boost gauge present
AFR gauge in dash
Chassis dyno access
05
Editor & interface
v1 supports HP Tuners only. Other vendors are reserved in the schema and will unlock in v2.
Editor tool
License level (HPT)
Interface hardware
Cal file format
Defaults: HPT Standard · MPVI3 · single wideband present · 93 octane · temperate · sea-level · street-legal.