Swapping an Infiniti V6 into a Mitsubishi 3000GT: A Comprehensive Guide

Swapping a V6 engine from an Infiniti G35 or G37 Coupe into a Mitsubishi 3000GT is a complex project that requires meticulous planning and execution. This article delves into the various factors and potential complications involved in this ambitious vehicle modification.

Compatibility and Fitment

The engine swap into the 3000GT involves several significant considerations, starting with compatibility and fitment. The engine mounts for the G35/G37 V6 do not align seamlessly with the 3000GT's engine bay. Custom engine mounts will need to be fabricated to ensure proper installation.

Engine Mounts

Engine mounts play a crucial role in vehicle stability and performance. The mounts for the G35/G37 V6 will not fit the 3000GT's engine bay. Therefore, custom engine mounts must be designed and constructed to match the contoured space. This fabrication process can be intricate and may require specialized tools and expertise.

Transmission

The second major factor to consider is the transmission. The G35/G37 uses a rear-wheel-drive (RWD) layout, whereas the 3000GT is primarily a front-wheel-drive (FWD) vehicle in its non-all-wheel-drive variants. Adapting or swapping the transmission is necessary to fit the engine properly.

This adaptation can complicate drivetrain alignment and fitment. Drivetrain components, including the transmission and axles, may not be capable of handling the increased power, leading to potential failures if not upgraded or reinforced.

Dimensions

The dimensions of the V6 engine can also pose a challenge. The physical dimensions of the V6 may differ significantly from the 3000GT’s original engine. Adequate space must be ensured, particularly concerning the engine’s height and width, to prevent overcrowding in the engine bay.

Electrical and ECU Integration

Wiring Harness

The current wiring harness from the G35/G37 will not match the 3000GT. Modifying the existing harness or creating a new one to integrate the engine’s sensors and electronics is necessary to keep the vehicle’s systems functioning optimally.

ECU Compatibility

The engine control unit (ECU) from the G35/G37 needs to be compatible with the 3000GT’s systems. This may require custom tuning or the installation of an aftermarket standalone ECU to manage the engine functions effectively. Ensuring the ECU can handle the increased power output is crucial for smooth operation and overall vehicle performance.

Performance and Power Increase

Power Increase

The V6 from the G35/G37 is significantly more powerful than the stock engines found in the 3000GT. This power increase can lead to several complications:

Drivetrain Stress: Existing drivetrain components, including the transmission and axles, may not be able to handle the increased power, leading to potential failures. Upgrading these components is essential to prevent such issues. Cooling Requirements: The additional power can generate more heat, requiring upgraded cooling systems like a more efficient radiator and cooling fans to prevent overheating. Proper cooling is vital for engine longevity and performance. Suspension and Braking: The increased power necessitates upgrades to the suspension and braking systems to manage the added performance safely. Enhanced suspension can improve handling, while reliable brakes ensure better control during high-performance driving.

Additional Considerations

Legal and Regulatory

Depending on your location, engine swaps can have legal implications, including emissions regulations. Ensure that the swap complies with local laws to avoid legal issues and potential penalties.

Cost and Time

This type of swap can be a time-consuming and expensive project, requiring investment in both parts and fabrication costs. Professional help may be necessary, and the process can take several weeks or even months to complete.

Skill Level

This project requires a significant level of mechanical skill and knowledge, particularly in custom fabrication and electronics. If you lack experience, consider seeking help from professionals or experienced hobbyists. Engaging experts can ensure the project is done correctly and safely.

Conclusion

Swapping a V6 from an Infiniti G35 or G37 into a Mitsubishi 3000GT is a challenging but potentially rewarding project. It requires careful planning, significant modifications, and a good understanding of both mechanical and electrical systems.

Be prepared for complications related to fitment, integration, and the increased power output on the vehicle’s systems. Careful preparation and a thorough understanding of the challenges involved are key to a successful project.