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The 1G Eclipse, produced by Mitsubishi and marketed under the Eagle and Plymouth brands, has long been a favorite among car enthusiasts. Known for its lightweight design and turbocharged engines, this vehicle offers a solid platform for performance upgrades. In this article, we will explore how a 1G Eclipse achieved an impressive 250 wheel horsepower (WHP) with simple bolt-on modifications, making it an excellent case study for those looking to enhance their own vehicles.
Understanding the 1G Eclipse
The first-generation Eclipse, produced from 1990 to 1994, is equipped with a variety of engine options, including the 1.8L 4G63 and the 2.0L 4G63T. The turbocharged 4G63T engine is particularly notable for its tuning potential. With a relatively low curb weight, the 1G Eclipse provides a great power-to-weight ratio, making it an ideal candidate for performance modifications.
Key Modifications for Achieving 250 WHP
To reach the target of 250 WHP, several key modifications were made to the 1G Eclipse. These modifications are relatively simple and can be performed without extensive mechanical knowledge.
- Upgraded Turbocharger: Replacing the stock turbo with a larger unit allows for increased airflow and power.
- Performance Exhaust System: A high-flow exhaust reduces back pressure and enhances engine efficiency.
- Cold Air Intake: This modification improves airflow to the engine, increasing power and throttle response.
- Upgraded Fuel System: Larger fuel injectors and a high-flow fuel pump ensure adequate fuel supply for increased horsepower.
- ECU Tune: A proper tune is essential to optimize performance and ensure the engine runs smoothly with the new modifications.
Step-by-Step Breakdown of Modifications
1. Upgraded Turbocharger
The stock turbocharger on the 1G Eclipse can be limiting for performance enthusiasts. Upgrading to a larger turbo, such as the 16G, significantly increases power potential. This turbo can support higher boost levels while maintaining reliability.
2. Performance Exhaust System
A performance exhaust system, including headers and a cat-back system, allows exhaust gases to exit the engine more efficiently. This reduction in back pressure helps the engine breathe better and enhances overall performance.
3. Cold Air Intake
Installing a cold air intake system improves the engine’s intake airflow. By drawing in cooler air from outside the engine bay, the vehicle can achieve better combustion, leading to increased power output.
4. Upgraded Fuel System
To support the increased airflow from the upgraded turbo and intake, the fuel system must also be upgraded. Larger fuel injectors and a high-flow fuel pump ensure that the engine receives the necessary fuel to match the increased air supply.
5. ECU Tune
After all modifications are installed, a custom ECU tune is crucial. This tune adjusts fuel maps, ignition timing, and boost levels to ensure that the engine runs optimally and safely at higher power levels.
Real-World Results
After completing the modifications and tuning, the 1G Eclipse was taken to a dynamometer for testing. The results were impressive, with the vehicle achieving a peak output of 250 WHP. This power level not only enhances acceleration but also improves the overall driving experience.
Conclusion
The journey to achieving 250 WHP in a 1G Eclipse demonstrates that with the right modifications and attention to detail, significant performance gains are possible. These bolt-on upgrades are accessible to many enthusiasts and can transform a stock vehicle into a thrilling performance machine. For those considering similar upgrades, this case study serves as a valuable reference for enhancing their own 1G Eclipse.