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The Mitsubishi Eclipse, particularly the 1G model produced between 1990 and 1994, has garnered a reputation for its tunability and performance potential. With basic upgrades, many enthusiasts have reported impressive dyno results, achieving between 250 to 300 horsepower. This article delves into the real-world performance figures and the modifications that can help you reach these power levels.
Understanding the 1G Eclipse Engine
The 1G Eclipse is equipped with a 2.0-liter inline-four engine, known as the 4G63. This engine has been a favorite among tuners due to its robust design and potential for significant power gains. The turbocharged variants, particularly the GSX and GST models, provide a solid foundation for performance upgrades.
Basic Upgrades for Increased Performance
Achieving the 250-300 horsepower range typically requires a combination of several basic upgrades. Below are some of the most effective modifications.
- Turbo Upgrade: Replacing the factory turbo with a larger unit can significantly increase airflow and boost levels.
- Exhaust System: A high-performance exhaust system reduces back pressure and improves turbo spool time.
- Intake System: Upgrading to a high-flow intake allows for better airflow into the engine.
- ECU Tuning: A custom tune can optimize fuel and timing maps for the new modifications.
- Fuel System Upgrades: Larger fuel injectors and a high-flow fuel pump ensure the engine receives adequate fuel under boost.
Real-World Dyno Results
Several enthusiasts have shared their dyno results after performing these basic upgrades. Here are some noteworthy examples:
- Example 1: A 1991 Eclipse GSX with a 16G turbo upgrade, full exhaust, and ECU tune achieved 275 hp at the wheels.
- Example 2: A 1993 Eclipse GST with a 20G turbo, upgraded injectors, and a cold air intake reached 290 hp at the wheels.
- Example 3: A 1994 Eclipse GSX with a larger intercooler and a cat-back exhaust recorded 260 hp at the wheels.
Factors Influencing Dyno Results
While the upgrades mentioned can lead to significant power gains, several factors can influence the final dyno results:
- Engine Condition: A well-maintained engine will perform better than one that is worn or neglected.
- Dyno Type: Different dynos can yield varying results; it’s essential to compare results from the same type of dyno.
- Weather Conditions: Temperature and humidity can affect engine performance during testing.
- Tuning Quality: A professional tune can maximize the potential of your upgrades.
Conclusion
The 1G Mitsubishi Eclipse is a fantastic platform for those looking to increase horsepower with basic upgrades. With the right modifications, reaching 250-300 hp is achievable and has been demonstrated by many enthusiasts. By understanding the engine’s capabilities and investing in quality parts and tuning, you can unlock the full potential of your 1G Eclipse.