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The 4G63 engine, known for its robust performance and tuning potential, is a favorite among car enthusiasts looking to build high-horsepower vehicles. In this guide, we will walk you through the process of upgrading your 4G63 turbo engine to achieve over 600 horsepower using precision parts. This step-by-step approach will ensure that you understand each component involved in the build and the importance of quality parts.
Understanding the 4G63 Engine
The 4G63 is a 2.0L inline-four engine that was produced by Mitsubishi. It gained fame for its use in the Mitsubishi Eclipse and other models. Known for its strong iron block and aluminum DOHC head, the 4G63 has a significant aftermarket support, making it an ideal candidate for high-performance builds.
- Production Years: 1988-2000
- Applications: Mitsubishi Eclipse, Eagle Talon, Mitsubishi Galant
- Base Power Output: 135-190 hp (varies by model)
Essential Components for a 600+ HP Build
To achieve over 600 horsepower, you will need to upgrade several key components of the 4G63 engine. Below is a list of essential parts that are necessary for a successful build.
- Turbocharger: A large turbo capable of producing high boost levels.
- Fuel System: Upgraded fuel injectors and pump to support increased fuel demand.
- Engine Management: A standalone ECU for precise tuning.
- Internals: Forged pistons and rods for increased strength.
- Exhaust System: A high-flow exhaust to reduce back pressure.
- Intercooler: A larger intercooler to keep intake temperatures low.
Step 1: Disassembling the Engine
Before you can upgrade your 4G63 engine, you need to disassemble it. This step involves removing the engine from the vehicle and taking it apart to access the internal components.
- Disconnect the battery and remove the engine from the vehicle.
- Drain fluids and remove all accessories attached to the engine.
- Carefully remove the intake and exhaust manifolds.
- Take off the cylinder head and inspect for wear.
Step 2: Upgrading the Internals
With the engine disassembled, it’s time to upgrade the internals to handle the increased power. This includes installing forged pistons and rods, which are essential for reliability at high horsepower levels.
- Remove the stock pistons and rods.
- Install forged pistons that are designed for high boost applications.
- Replace the stock connecting rods with forged alternatives.
- Ensure proper clearances and tolerances are maintained during installation.
Step 3: Selecting the Right Turbocharger
The choice of turbocharger is critical for achieving 600+ horsepower. You need a turbo that can provide sufficient airflow without sacrificing response. Popular options include the Garrett GT35R or the Precision 6266.
- Research turbo options based on your specific power goals.
- Choose a turbo with a suitable compressor and turbine size.
- Consider a turbo with adjustable boost control capabilities.
Step 4: Upgrading the Fuel System
To support the increased power output, the fuel system must be upgraded. This includes installing larger fuel injectors and a high-flow fuel pump.
- Select fuel injectors rated for the desired horsepower.
- Install a high-flow fuel pump to ensure adequate fuel delivery.
- Upgrade the fuel lines to handle the increased flow.
Step 5: Engine Management and Tuning
Proper engine management is crucial for maximizing performance and reliability. A standalone ECU allows for precise tuning of fuel and ignition maps.
- Choose a standalone ECU compatible with the 4G63 engine.
- Install the ECU and connect it to the engine sensors.
- Work with a professional tuner to dial in the settings for optimal performance.
Step 6: Installing the Exhaust System
A high-flow exhaust system is essential for reducing back pressure and improving turbo efficiency. This will help your engine breathe better at high RPMs.
- Remove the stock exhaust system.
- Install a performance downpipe and cat-back exhaust.
- Ensure all connections are secure and leak-free.
Step 7: Installing the Intercooler
A larger intercooler is necessary to keep intake air temperatures low, especially when running high boost levels. This helps prevent detonation and increases power.
- Choose an intercooler that fits your vehicle and supports your power goals.
- Install the intercooler and connect it to the intake and turbo piping.
- Check for any leaks and ensure proper airflow.
Step 8: Final Assembly and Testing
After all upgrades are installed, it’s time to reassemble the engine and perform tests. Make sure everything is properly torqued and secured.
- Reinstall the cylinder head and torque it to specifications.
- Reconnect all wiring and hoses.
- Start the engine and check for any leaks or issues.
- Perform a dyno test to measure horsepower and tune as necessary.
Conclusion
Building a 600+ hp 4G63 turbo engine requires careful planning and high-quality parts. By following this step-by-step upgrade guide, you can achieve your performance goals while ensuring reliability and efficiency. Always remember to tune your engine properly and consult with professionals when necessary to get the best results.