Table of Contents
The FC RX-7 is a beloved sports car known for its lightweight design and rotary engine. Achieving 400 horsepower from this iconic vehicle is a thrilling goal for many enthusiasts. This article will guide you through the necessary upgrades and supporting modifications to reach this impressive power level.
Understanding the FC RX-7 Rotary Engine
The heart of the FC RX-7 is its rotary engine, specifically the 13B variant. This engine is known for its unique design and high-revving capabilities. To achieve 400 hp, we must optimize its performance through various upgrades.
Key Upgrades for Achieving 400 HP
- Turbocharger Upgrade: A larger turbocharger is essential for increasing airflow and boosting power.
- Fuel System Enhancements: Upgrading injectors and fuel pumps ensures adequate fuel delivery for higher horsepower.
- Exhaust System: A high-performance exhaust system reduces back pressure and enhances engine efficiency.
- ECU Tuning: A custom ECU tune maximizes the potential of all modifications and optimizes engine performance.
Upgrading the Turbocharger
To achieve 400 hp, upgrading the turbocharger is one of the most critical steps. A larger turbo, such as the Garrett GT28 or a T04E, can provide the necessary boost. Ensure that the turbo is compatible with the engine and has the capability to support the desired horsepower.
Choosing the Right Turbocharger
When selecting a turbocharger, consider the following factors:
- Size: The turbo should be sized to match the engine’s airflow requirements.
- Response: A turbo with a quick spool time will provide better drivability.
- Durability: Choose a turbo that can withstand high boost levels without failure.
Enhancing the Fuel System
To support increased horsepower, the fuel system must be upgraded. This involves replacing the stock fuel injectors and fuel pump with high-performance alternatives.
Fuel Injectors
Opt for larger fuel injectors that can deliver the necessary fuel volume for 400 hp. Typically, 550cc to 850cc injectors are suitable for this power level. Ensure they are compatible with your engine management system.
Fuel Pump
A high-flow fuel pump is essential for maintaining proper fuel pressure under high demand. Consider options like the Walbro 255 lph pump, which is a popular choice among RX-7 enthusiasts.
Upgrading the Exhaust System
The exhaust system plays a crucial role in freeing up horsepower. A performance exhaust will reduce back pressure, allowing the engine to breathe more freely.
Choosing an Exhaust System
Look for a full cat-back exhaust system designed for the FC RX-7. Consider features such as:
- Material: Stainless steel is durable and resistant to corrosion.
- Diameter: A larger diameter will improve exhaust flow.
- Sound: Choose a system that provides the desired exhaust note.
ECU Tuning for Maximum Performance
After upgrading the turbocharger, fuel system, and exhaust, the final step is to tune the ECU. A proper tune will optimize fuel maps, ignition timing, and boost levels to ensure the engine runs efficiently and safely at the new power level.
Choosing a Tuning Solution
There are various tuning solutions available for the FC RX-7:
- Standalone ECU: Offers complete control over engine parameters.
- Reflash Options: Some stock ECUs can be reflashed for performance gains.
- Dyno Tuning: Always perform tuning on a dynamometer to ensure accurate power readings.
Supporting Modifications
In addition to the main upgrades, consider the following supporting modifications to ensure reliability and performance:
- Upgraded Intercooler: A larger intercooler will help reduce intake temperatures, improving performance.
- Better Cooling System: An upgraded radiator and thermostat will prevent overheating during high-performance driving.
- Suspension Upgrades: Improved suspension components will enhance handling and stability.
- Brake Upgrades: High-performance brakes are crucial for safely managing increased speed.
Conclusion
Achieving 400 hp on the FC RX-7 requires a combination of turbo upgrades, fuel system enhancements, exhaust modifications, and ECU tuning. By following this guide and considering supporting modifications, you can unlock the full potential of your rotary engine and enjoy the exhilarating performance that comes with it.