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F-CON V Pro Ver3.4 + PowerWriter Set

Stand-alone Computer for High-level Professional Tuners.

The fuel injection management method is selectable from L-jetro, D-jetro, and throttle control instead of the stock management method.


  • HKS' long-seller full engine management computer F-CON V Pro Ver. 3.4 is now available as a set including Power Writer (PC software) and communication cables.
    * F-CON V Pro Vehicle Specific Harness and other sensors are available separately as F-CON V Pro option parts.
  • More detailed and wider variety of parameters can be managed with this product.
    * No base setting is pre-programmed. Settings according a vehicle are required.
    * This product does not work on a vehicle without F-CON V Pro Vehicle Specific Harness.


  • Fuel and ignition can be fully controlled.
  • Solenoid valves, relays and warning light can be controlled using option functions.
  • PowerWriter software enables output control and monitoring of engine parameters.
  • The fuel management is available up to 8 injectors so it is capable of controlling the sequential 4-cylinder twin injector as well as sequential 8-cylinder.
  • Ignition control is available up to 8 systems. Also, rev-limit function by restrict the ignition is available for race use. This function enables the engine boost to be maintained while the vehicle is stopped before a "drag start".
  • Connecting an A/F meter enables the feedback control function which the A/C value is automatically fed back to the target A/F value. A built-in log data memory function is also available to provide a product by considering easiness for its use.


The control that many auxiliary outputs are linked has become possible with the high-level fuel and ignition control based on various signal input function as well as the option output function.

Input Items

  • Airflow
  • Throttle
  • Acceleration
  • Intake Air Pressure
  • Water Temperature
  • Intake Air Temperature
  • Exhaust Air Temperature
  • Fuel Temperature
  • Oil Temperature
  • Fuel Pressure
  • Oil Pressure
  • Atmospheric Pressure
  • External A/F
  • External Knocking
  • O2
  • Fuel Volume Correction
  • Ignition Volume Correction
  • Fuel Sub-correction Selection
  • Ignition Sub-correction Selection
  • Ignition Cut RPM Correction


Option Output Function

To perform a hard level tuning from boost-up tuning, with this version of F-Con V Pro, data edit in real time that is not available by flash rewriting is possible, and setting workability is high. Also, driving data can be recorded using a log function.

  • Electric Fan Relay
  • Fuel Pump Relay
  • NOS Relay
  • A/C Relay
  • Main Relay
  • IC Spray
  • Idle Control
  • Logging Stats
  • Anti-lag Status
  • Ignition Cut (Start) Status
  • Error
  • Communication
  • Power Status
  • Boost Control
  • Warning Rpm
  • Warning A/F
  • Warning Knocking
  • Warning Water Temperature
  • Warning Oil Temperature
  • Warning Exhaust Air Temperature
  • Warning Other Pressure
  • Warning Intake Air Pressure
  • Warning Fuel Pressure
  • Warning Oil Pressure


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