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The Mazda RX-7, particularly the FC model, is a beloved sports car known for its lightweight design and rotary engine. Building a 350 horsepower (HP) FC RX-7 using Mazdaspeed parts and custom fabrication can be an exciting project for enthusiasts. In this article, we will break down the costs associated with this build, providing insights into various components and their respective prices.
Understanding the Basics of the FC RX-7
The FC RX-7 was produced between 1986 and 1992 and is celebrated for its performance and handling. Its lightweight chassis and rotary engine make it an ideal candidate for modifications. Achieving 350 HP requires careful selection of parts and a solid understanding of rotary engine tuning.
Cost Breakdown Overview
Building a 350 HP FC RX-7 involves several key components, including the engine, turbocharger, exhaust system, fuel system, and more. Below is a detailed breakdown of the estimated costs associated with each part of the build.
- Engine Components: $3,000 – $5,000
- Turbocharger: $1,000 – $2,500
- Exhaust System: $800 – $1,500
- Fuel System: $600 – $1,200
- ECU and Tuning: $1,000 – $2,000
- Transmission: $1,500 – $3,000
- Suspension and Brakes: $1,000 – $2,500
- Custom Fabrication: $1,000 – $3,000
- Miscellaneous Parts: $500 – $1,000
Engine Components
The heart of the RX-7 is its rotary engine. To achieve 350 HP, several modifications are necessary, including upgrading the apex seals, rotors, and housing. Below is a breakdown of the costs associated with these components.
- Apex Seals: $300 – $600
- Rotors: $800 – $1,200
- Engine Rebuild Kit: $1,000 – $2,000
Turbocharger Selection
A turbocharger is essential for boosting the power of the rotary engine. Selecting the right turbo is crucial for achieving the desired horsepower while maintaining reliability.
- Turbocharger Options:
- Garrett GT28: $1,000 – $1,500
- Precision 5858: $1,500 – $2,500
Exhaust System Upgrades
A high-performance exhaust system is vital for optimizing airflow and enhancing engine performance. Upgrading the exhaust can also improve the sound of the vehicle.
- Cat-back Exhaust System: $800 – $1,200
- Downpipe: $200 – $300
Fuel System Enhancements
To support the increased horsepower, the fuel system must be upgraded to ensure adequate fuel delivery. This includes larger injectors and a high-flow fuel pump.
- Fuel Injectors: $300 – $600
- Fuel Pump: $200 – $400
- Fuel Pressure Regulator: $100 – $200
ECU and Tuning
A custom ECU and tuning are essential for maximizing performance and ensuring the engine runs smoothly with the new modifications. This step is crucial for reliability and performance.
- Aftermarket ECU: $600 – $1,200
- Tuning Session: $400 – $800
Transmission Considerations
With increased horsepower, the transmission must be capable of handling the power. Upgrading to a stronger transmission or rebuilding the existing one is often necessary.
- Transmission Rebuild: $1,500 – $2,500
- Aftermarket Transmission Options: $2,000 – $3,000
Suspension and Brake Upgrades
To handle the increased power, upgrading the suspension and brakes is essential. This ensures better handling and stopping power, enhancing overall performance.
- Coilover Suspension Kit: $800 – $1,500
- Brake Upgrade Kit: $400 – $1,000
Custom Fabrication Costs
Custom fabrication may be required for various components, such as intercooler piping, engine mounts, and other unique setups. These costs can vary significantly based on the complexity of the work.
- Custom Piping: $500 – $1,000
- Engine Mounts: $300 – $600
Miscellaneous Costs
In addition to the major components, there are miscellaneous costs that can add up during the build process. These may include tools, fluids, and small parts.
- Fluids and Filters: $100 – $200
- Tools and Equipment: $400 – $800
Total Estimated Costs
Based on the breakdown provided, the total estimated cost for building a 350 HP FC RX-7 with Mazdaspeed parts and custom fabrication ranges from approximately $11,800 to $21,000. This range can vary based on personal choices, labor costs, and specific parts selected.
Conclusion
Building a 350 HP FC RX-7 is a rewarding project that requires careful planning and budgeting. By understanding the costs associated with each component, enthusiasts can make informed decisions and create a powerful and reliable vehicle. Whether you choose to tackle the build yourself or enlist the help of professionals, the journey promises to be exhilarating.