AiM XRK/DRK Binary

v1.0.0

Binary log files from AiM motorsport data acquisition devices. Supports MXP, MXG, MXL2, EVO5, MyChron5, and similar loggers. Format characteristics: - Binary format with "<hCNF" magic header - Channel definitions in <hCHS> sections - Metadata in footer (vehicle, track, etc.) - Data records in )(G blocks containing f32 values - Little-endian byte order for data values - Typical sample rate: 100Hz

aim

47 channels

binary

Website

File Format

Type

binary

Extensions

.xrk, .drk

Endianness

little

Channels (47)

acceleration

g_lateralLateral G

Lateral acceleration (positive = right)

gfloat-5 - 5

g_longitudinalLongitudinal G

Longitudinal acceleration (positive = acceleration)

gfloat-5 - 5

g_verticalVertical G

Vertical acceleration

gfloat-5 - 5

driver_input

steering_angleSteering Angle

Steering wheel angle

degreesfloat-900 - 900

drivetrain

gearGear Position

Current transmission gear

gearint0 - 8

electrical

battery_voltageBattery Voltage

System battery voltage

voltsfloat0 - 20

engine

rpmEngine RPM

Engine speed from RPM signal

rpmfloat0 - 20000

tpsThrottle Position

Throttle position sensor

percentfloat0 - 100

fuel

lambdaLambda

Lambda value from wideband O2

lambdafloat0.6 - 1.5

lambda_2Lambda 2

Lambda value from second wideband O2

lambdafloat0.6 - 1.5

afrAir-Fuel Ratio

Measured air-fuel ratio

afrfloat10 - 20

fuel_flowFuel Flow

Instantaneous fuel consumption

l/hfloat0 - 200

position

gps_latitudeGPS Latitude

GPS latitude position

degreesfloat-90 - 90

gps_longitudeGPS Longitude

GPS longitude position

degreesfloat-180 - 180

gps_altitudeGPS Altitude

GPS altitude above sea level

metersfloat-500 - 10000

gps_headingGPS Heading

GPS heading/course

degreesfloat0 - 360

distanceDistance

Total distance traveled

metersfloat0 - 1000000

pressure

mapManifold Pressure

Manifold absolute pressure

kpafloat0 - 400

boostBoost Pressure

Boost pressure (gauge)

barfloat-1 - 4

fuel_pressureFuel Pressure

Fuel system pressure

barfloat0 - 10

oil_pressureOil Pressure

Engine oil pressure

barfloat0 - 15

brake_pressure_frontBrake Pressure Front

Front brake line pressure

barfloat0 - 200

brake_pressure_rearBrake Pressure Rear

Rear brake line pressure

barfloat0 - 200

rotation

gyro_yawYaw Rate

Yaw rotation rate

deg/sfloat-500 - 500

gyro_pitchPitch Rate

Pitch rotation rate

deg/sfloat-500 - 500

gyro_rollRoll Rate

Roll rotation rate

deg/sfloat-500 - 500

speed

vehicle_speedVehicle Speed

Vehicle ground speed from GPS or wheel speed

kphfloat0 - 400

wheel_speed_flWheel Speed FL

Front left wheel speed

kphfloat0 - 400

wheel_speed_frWheel Speed FR

Front right wheel speed

kphfloat0 - 400

wheel_speed_rlWheel Speed RL

Rear left wheel speed

kphfloat0 - 400

wheel_speed_rrWheel Speed RR

Rear right wheel speed

kphfloat0 - 400

suspension

suspension_flSuspension FL

Front left suspension travel

millimetersfloat0 - 300

suspension_frSuspension FR

Front right suspension travel

millimetersfloat0 - 300

suspension_rlSuspension RL

Rear left suspension travel

millimetersfloat0 - 300

suspension_rrSuspension RR

Rear right suspension travel

millimetersfloat0 - 300

system

gps_satellitesGPS Satellites

Number of GPS satellites in view

countint0 - 30

temperature

coolant_tempWater Temperature

Engine coolant/water temperature

celsiusfloat-40 - 150

oil_tempOil Temperature

Engine oil temperature

celsiusfloat-40 - 180

iatAir Temperature

Intake air temperature

celsiusfloat-40 - 100

exhaust_tempExhaust Temperature

Exhaust gas temperature

celsiusfloat0 - 1200

exhaust_temp_2Exhaust Temperature 2

Second exhaust gas temperature

celsiusfloat0 - 1200

exhaust_temp_3Exhaust Temperature 3

Third exhaust gas temperature

celsiusfloat0 - 1200

exhaust_temp_4Exhaust Temperature 4

Fourth exhaust gas temperature

celsiusfloat0 - 1200

gearbox_tempGearbox Temperature

Transmission oil temperature

celsiusfloat-40 - 180

timing

lap_numberLap Number

Current lap number

lapint0 - 1000

lap_timeLap Time

Current lap time

secondsfloat0 - 600

best_lap_timeBest Lap Time

Best lap time in session

secondsfloat0 - 600

Metadata

Tested With

AiM MXPAiM MXGAiM MXL2AiM EVO5AiM MyChron5

Known Issues

Channel names and units extracted from binary may vary by device configuration
Data extraction from )(G records may be incomplete for some file variants
For best results on macOS, export to CSV using Race Studio 3