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RC Mini XX – Sporty ECU

ECU Hardware Features

• New generation 4-core MCU with updated process technology; 25% faster than Mini X.

• GaN & CFD VC aluminum CNC heat-sink materials for improved cooling and efficiency.

• Replaces the stock ECU and includes eBoost capability.

• New power-supply design increases efficiency by 50% with more stable output.

• 360-degree Wi-Fi antenna with 200% stronger connection signal.

• Built-in RGB LED indicator.

• Rugged case design suitable for harsh environments.

ECU Features

• Uses the new aRacer X-TUNE app platform with stronger functions, Wi-Fi connection, and internet features.

• Built-in activation code settings allow connection via mobile hotspot with remote monitoring.

• Two platforms available:

  • Lite – Lower price, basic features.

  • Pro – Mid-price, full feature set.

• Both Lite and Pro offer paid subscriptions to unlock new or additional functions.

• Each ECU has a unique ID for online feature unlocking and OTA updates.

• Lite version lacks auto-tuning unless upgraded via paid feature.

• Lite version does not include ignition timing, injection angle, start fuel, or advanced adjustments unless unlocked via subscription.

• Yamaha / Honda ECUs support ISG control models and eBoost 1–8 second motor-power control depending on ECU model.

• QB burn-in time reduced by 200% (<60 sec).

eCVT Function

• Allows complete, fast adjustment of CVT behavior.

• Adjustable parameters:

  • Engine Max RPM

  • Engine Max Output RPM

  • Clutch-in RPM

  • Engine-brake RPM after throttle closed

  • CVT gear-change speed

  • CVT curve adjustment

  • Dyno Power Measurement Mode

  • MAP Calibration Mode

Fuel Injection Angle Display

• Real-time visualization of injection angle.

• Displays intake and exhaust cam overlap based on cam setting.

• Shows fuel injector opening and closing position dynamically.

• Helps understand injection timing relative to intake, compression, and exhaust phases.

eBoost Function

• Adjustable eBoost output power percentage and time.

• Charging output power adjustable 60%–100% (80% default).

• “Sporty” response and improved acceleration.

First-Connection Activation Code

• Built-in dedicated QR-code camera for fast ECU activation.

• Quick connection auto-scans activation code and inputs it into the ECU.

• App generates a connection shortcut key for future quick access.

• Activation time stored in aRacer Server for warranty tracking.

Injector Tolerance Correction

• World’s first tolerance-correction system for on-board injectors.

• Calibrates individual injector plunger-time tolerance for precise fuel delivery.

• Calibration values stored directly in the ECU.

• Provides more accurate AT auto-tuning and faster correction response.

• Results in more accurate fueling and improved performance.

RC Mini XX System Structure

• ECU connects to:

  • Response Button

  • Sport D Display

  • aRacer AF2 / AF3 Air-Fuel Sensors

• Supports tuning via PC or phone using Wi-Fi.

• Works with aRacer X-TUNE app.

RC Mini XX Functions

1. Powerful Base Adjustment

• 20×17 Fuel (RPM × TPS) map adjustment

• 20×9 Ignition-angle (RPM × TPS) adjustment

• 20×9 Target AFR (RPM × TPS) setting

2. Intelligent AT Auto-Tuning Gen2

• Faster, more accurate auto-tuning

• Uses AF2 and AF3 wideband sensors for real-time A/F feedback

3. New Smart Features

• Quick activation-code scan + Wi-Fi connection

• Remote-monitoring ECU data function

• Real-time fuel-injection angle display

• Graphical injector opening-position display

• Real-time injector pulse-position & duration

• Fuel-injector tolerance correction