How to Install a Hondata S300 on the F20c: Step-by-step for 20+ Hp Gains

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The Hondata S300 is a popular engine management system that can provide significant performance improvements for the F20C engine found in the Honda S2000. In this guide, we will walk you through the step-by-step process of installing the Hondata S300, which can lead to gains of over 20 horsepower when tuned correctly.

What You Will Need

  • Hondata S300 unit
  • F20C ECU
  • Soldering iron and solder
  • Wire strippers and crimpers
  • Heat shrink tubing
  • Electrical tape
  • Basic hand tools (screwdrivers, wrenches)
  • PC with Hondata software

Step 1: Prepare Your Workspace

Before starting the installation, ensure you have a clean and well-lit workspace. Gather all necessary tools and components to avoid interruptions during the process.

Step 2: Remove the ECU

To access the ECU, you will need to remove it from the vehicle. This typically involves:

  • Disconnect the negative battery terminal.
  • Locate the ECU in the passenger footwell.
  • Remove the screws or bolts securing the ECU cover.
  • Gently unplug the ECU connectors.
  • Take the ECU out of the vehicle.

Step 3: Open the ECU

With the ECU removed, carefully open it by unscrewing the case. Be cautious not to damage any components inside.

Step 4: Install the Hondata S300

Follow these steps to install the Hondata S300 into the ECU:

  • Identify the location for the Hondata S300 board inside the ECU.
  • Use the soldering iron to attach the S300 board to the ECU’s circuit board.
  • Connect the necessary wires from the S300 to the ECU as per the provided wiring diagram.
  • Ensure all connections are secure and insulated with heat shrink tubing or electrical tape.

Step 5: Reassemble the ECU

Once the S300 is securely installed, carefully reassemble the ECU case. Make sure all screws are tightened and the case is sealed properly to prevent any environmental damage.

Step 6: Reinstall the ECU

With the ECU reassembled, it’s time to reinstall it in the vehicle:

  • Reconnect the ECU connectors securely.
  • Replace the ECU cover and secure it with screws or bolts.
  • Reconnect the negative battery terminal.

Step 7: Install Hondata Software

To take full advantage of the Hondata S300, you must install the Hondata software on your PC. This software will allow you to tune your engine for optimal performance:

  • Download the latest version of Hondata software from the official website.
  • Follow the installation instructions provided with the software.
  • Connect your PC to the Hondata S300 using a USB cable.

Step 8: Tune Your Engine

With everything installed, you can now begin tuning your engine. It is recommended to consult with a professional tuner to achieve the best results:

  • Open the Hondata software and load the base map for your F20C.
  • Adjust parameters such as fuel maps, ignition timing, and VTEC engagement.
  • Save your changes and upload the new map to the S300.
  • Test drive the vehicle to assess performance and make further adjustments as necessary.

Conclusion

Installing a Hondata S300 on the F20C can lead to impressive horsepower gains and improved engine performance. By following these steps carefully, you can enhance your vehicle’s capabilities and enjoy a more thrilling driving experience.