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The 4G63 engine has earned a legendary status among car enthusiasts, particularly for its performance capabilities in the Mitsubishi Eclipse. With the right modifications, achieving over 700 horsepower is not just a dream but a reality. This article explores how to max out the 4G63 Eclipse using an HKS turbo and built internals.
Understanding the 4G63 Engine
The 4G63 is a turbocharged inline-four engine that was used in various Mitsubishi models, including the Eclipse. Its robust design and tuning potential make it a favorite among tuners. Key features of the 4G63 include:
- 2.0-liter displacement
- DOHC design
- Turbocharged from the factory
- Strong aftermarket support
Preparing for High Power
Before pursuing high horsepower figures, it’s essential to prepare the engine properly. This includes upgrading various components to handle the increased power output. Here are some critical upgrades to consider:
- Forged Internals: Upgrading to forged pistons and connecting rods will help withstand the stress of high horsepower.
- High-Performance Head: A ported and polished cylinder head can improve airflow and performance.
- Upgraded Fuel System: A high-flow fuel pump and larger injectors are necessary to support increased fuel demands.
- Enhanced Cooling: An upgraded intercooler and radiator will help manage heat during high-performance runs.
Choosing the Right Turbo
The turbocharger is a critical component in achieving 700+ horsepower. The HKS turbo is a popular choice for 4G63 builds due to its reliability and performance. When selecting a turbo, consider:
- Turbo Size: A larger turbo can produce more power but may have a higher lag.
- Compressor Efficiency: Ensure the turbo has a high efficiency rating to maximize power output.
- Wastegate Setup: An external wastegate may offer better boost control and performance.
Building the Engine Internals
Building the internals of the 4G63 is crucial for handling the stresses of high horsepower. Here’s a breakdown of essential components:
- Pistons: Choose forged pistons with a suitable compression ratio for turbo applications.
- Connecting Rods: Invest in high-strength forged rods to prevent failure under high loads.
- Cylinder Head: Consider using a multi-layer steel (MLS) head gasket for better sealing under boost.
Tuning for Maximum Performance
After upgrading the engine and turbo, proper tuning is essential to maximize performance and reliability. Here are key elements to focus on during tuning:
- ECU Remapping: Use a standalone or piggyback ECU to optimize fuel maps and ignition timing.
- Boost Control: Set up a boost controller to manage turbo pressure effectively.
- A/F Ratio Monitoring: Keep an eye on air-fuel ratios to prevent lean conditions that can cause engine damage.
Testing and Fine-Tuning
Once the build is complete, it’s time for testing. Start with low boost levels and gradually increase while monitoring engine parameters. Important testing points include:
- Dyno Testing: Use a dynamometer to measure horsepower and torque accurately.
- Data Logging: Record data during runs to analyze performance and make adjustments.
- Temperature Checks: Monitor engine and oil temperatures to ensure they remain within safe limits.
Maintaining Your High-Powered 4G63
With great power comes great responsibility. Maintaining a high-powered 4G63 is crucial for longevity and performance. Here are some maintenance tips:
- Regular Oil Changes: Use high-quality synthetic oil and change it frequently.
- Inspect Components: Regularly check for wear on belts, hoses, and other critical components.
- Monitor Boost Levels: Keep an eye on boost pressure to avoid over-boosting the engine.
Conclusion
Maxing out the 4G63 Eclipse to achieve over 700 horsepower is an achievable goal with the right modifications and tuning. By investing in quality components, proper tuning, and regular maintenance, enthusiasts can enjoy the thrill of a high-performance vehicle that stands out on the road.