For owners of the Mitsubishi 3000GT seeking to modernize their engine management system, converting from the original OBD1 to OBD2 offers significant advantages, particularly in terms of diagnostic logging and tuning capabilities. While not as straightforward as on some other car platforms, several viable options exist to bring your 3000GT into the OBD2 era. Unlike certain makes where simple ECU flashes suffice for tuning, the 3000GT requires a more hands-on approach. Let’s explore the available paths to achieve OBD2 compatibility for your vehicle.
Option 1: BlackStealth MUT to OBD2 CANBUS Converter for Enhanced Data Logging
If your primary goal is to gain access to modern OBD2 logging features, the BlackStealth MUT to OBD2 CANBUS converter presents a practical solution. This device bridges the gap between your 1992 and earlier 3000GT’s MUT (Mitsubishi Unified Test) system and contemporary OBD2 protocols. By simply plugging in this converter, you can effectively output OBD2 data, making your vehicle compatible with popular logging applications like Torque on Android and iOS devices.
Furthermore, the BlackStealth converter is designed with expandability in mind. It accommodates additional sensor inputs, such as wideband oxygen sensors and boost pressure sensors. This allows for a more comprehensive data logging setup, crucial for performance monitoring and diagnostics. It’s important to note that while this converter significantly enhances logging, tuning capabilities remain reliant on piggyback systems. Despite this, piggyback tuning offers considerable potential for performance adjustments.
Option 2: Chrome ECU for Plug-and-Play OBD2 Logging and Tuning
For a more integrated OBD2 conversion that unlocks both advanced logging and tuning capabilities, consider swapping to a Chrome ECU. These ECUs, available from vendors specializing in 3000GT performance parts, are engineered for a straightforward plug-and-play installation. The Chrome ECU upgrade provides native OBD2 compatibility, simplifying both data logging and ECU tuning processes.
Choosing the Chrome ECU offers a significant leap in tuning flexibility compared to piggyback systems. It grants access to advanced features directly through ECU reprogramming. These features can include launch control, ECU-controlled boost management, and accommodation for larger fuel injectors necessary for E85 fuel conversions. Moreover, the Chrome ECU retains the built-in safety features of the stock ECU, offering a blend of performance enhancement and system protection.
Option 3: ’99 ECU Swap for a Cost-Effective OBD2 Retrofit
Another avenue for OBD2 conversion involves retrofitting a ’99 3000GT ECU into your earlier model. This method necessitates creating or acquiring a custom wiring harness to adapt the ’99 ECU to your older vehicle’s electrical system. Coding the ’99 ECU to function correctly within your specific 3000GT configuration is also a necessary step.
While potentially more economical if you are comfortable with automotive wiring and can source components at competitive prices, the ’99 ECU swap demands more technical expertise and time investment compared to the Chrome ECU. The primary advantage of this approach is cost savings, particularly for those willing to undertake the wiring and configuration challenges themselves. Like the Chrome ECU, the ’99 ECU, when running Chrome firmware, unlocks advanced tuning features beyond basic piggyback control.
Essential Tools for Tuning and Data Logging
Regardless of the OBD2 conversion method chosen, certain tools are essential for effective tuning and data logging. For comprehensive data acquisition, consider using EvoScan software on a PC or the BlackStealth converter for mobile logging. ECU tuning, particularly with Chrome ECUs, typically requires a laptop PC and an Openport 2.0 cable used in conjunction with ECUflash software.
Unless you are engaging a professional dyno tuner or street tuner, you should anticipate performing the tuning process yourself. While the learning curve can be initially steep, especially for those new to ECU tuning, abundant resources are readily available. Guides, such as those found on enthusiast forums and sister sites dedicated to the 3000GT platform, alongside general information from the Mitsubishi Evo tuning community, can provide valuable insights and support. Merlin’s Flash Guide is also a frequently recommended resource for ECU flashing and tuning information.
Conclusion: Choosing the Right OBD2 Conversion Path for Your 3000GT
In summary, converting your 3000GT from OBD1 to OBD2 offers tangible benefits for both diagnostic logging and engine tuning. For users primarily focused on enhanced logging and ease of installation, the BlackStealth converter is a compelling option. For a more comprehensive upgrade unlocking advanced tuning alongside OBD2 logging, the Chrome ECU provides a user-friendly, plug-and-play solution. Lastly, the ’99 ECU swap caters to budget-conscious enthusiasts with DIY wiring skills seeking a cost-effective route to OBD2 functionality. Carefully consider your technical comfort level, budget, and desired level of tuning capability when selecting the OBD2 conversion method best suited for your 3000GT.
