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The Mazda RX-7 has long been a favorite among car enthusiasts, especially when it comes to engine swaps. The LS engine swap has gained immense popularity due to its reliability and power potential. However, for those looking to push the limits and achieve over 700 horsepower, upgrading to forged pistons and a Callies crankshaft is essential. This article will delve into the benefits and considerations of these upgrades.
Understanding the RX-7 LS Swap
The RX-7’s lightweight chassis and balanced handling make it an ideal candidate for the LS engine. The LS series engines are known for their strength and tunability, allowing enthusiasts to achieve significant power increases. However, reaching 700+ horsepower requires more than just a stock LS engine.
Why Upgrade to Forged Pistons?
Forged pistons are a crucial component for those aiming for high horsepower. Unlike cast pistons, forged pistons are made from a solid block of metal, which makes them stronger and more durable. Here are some reasons to consider forged pistons:
- Increased Strength: Forged pistons can withstand higher pressures and temperatures, making them ideal for high-performance applications.
- Better Performance: They provide improved thermal conductivity, which helps in managing engine temperatures effectively.
- Reduced Weight: Many forged pistons are lighter than their cast counterparts, which can enhance engine responsiveness.
- Custom Options: Forged pistons can be tailored to specific engine builds, allowing for optimal compression ratios and performance tuning.
Choosing the Right Callies Crankshaft
The crankshaft is the heart of the engine, converting the linear motion of the pistons into rotational motion. Upgrading to a Callies crankshaft is a popular choice among performance builders. Here’s why:
- High-Quality Materials: Callies crankshafts are made from premium materials that provide exceptional strength and durability.
- Precision Engineering: These crankshafts are meticulously engineered for balance and performance, which is crucial for high-revving applications.
- Lightweight Design: A lighter crankshaft can reduce rotational mass, improving engine response and acceleration.
- Compatibility: Callies offers a range of crankshafts that are designed to fit various LS engine configurations, making it easier to find the right match for your setup.
Integrating Upgrades for Maximum Performance
When upgrading to forged pistons and a Callies crankshaft, it’s essential to consider the entire engine setup. Here are some key components to also focus on:
- Upgraded Fuel System: Ensure your fuel system can support the increased horsepower with larger injectors and a high-flow fuel pump.
- Enhanced Cooling: A robust cooling system is necessary to handle the additional heat generated by high-performance builds.
- Performance Tuning: Proper tuning is critical to optimize the engine’s performance and ensure reliability.
- Strengthened Transmission: Upgrading the transmission may be necessary to handle the increased power and torque.
Installation Considerations
Installing forged pistons and a Callies crankshaft requires careful planning and execution. Here are some considerations to keep in mind:
- Professional Help: If you’re not experienced with engine builds, consider hiring a professional to ensure everything is installed correctly.
- Tools Required: Ensure you have the necessary tools and equipment for the job, including an engine hoist and torque wrenches.
- Follow Specifications: Always adhere to manufacturer specifications for torque settings and assembly procedures.
- Break-In Period: Allow for a proper break-in period after installation to ensure longevity and reliability of the engine.
Conclusion
Upgrading the RX-7 LS swap with forged pistons and a Callies crankshaft is a significant step towards achieving 700+ horsepower. These components not only enhance performance but also contribute to the overall reliability of the engine. With careful planning and execution, enthusiasts can enjoy the thrill of a high-powered RX-7 that delivers exhilarating performance on and off the track.