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The Mazda RX-7 has long been a favorite among car enthusiasts for its lightweight design and rotary engine. However, many have turned to LS swaps to achieve higher horsepower and torque. If you’re aiming for 800+ horsepower in your RX-7 LS swap, it’s essential to focus on a strong drivetrain and supporting modifications. This article will guide you through the necessary components and recommendations to reach that power goal.
Understanding the LS Swap
The LS engine series, known for its reliability and tuning potential, is a popular choice for engine swaps. Its lightweight aluminum construction and compact design make it suitable for the RX-7 chassis. When planning your swap, consider the following:
- Engine compatibility with RX-7 chassis
- Weight distribution and center of gravity
- Cooling system modifications
Choosing the Right LS Engine
To achieve 800+ horsepower, you need to select the right LS engine. Here are some popular options:
- LS3: A naturally aspirated engine, capable of producing around 430 hp stock.
- LS7: This engine offers 505 hp and is a great base for modifications.
- LSX: A block designed for high horsepower applications, often used in racing.
Drivetrain Considerations
A robust drivetrain is crucial for handling the power of an LS engine. Here are the key components to consider:
- Transmission: Consider a T56 or a TH400 for their strength and versatility.
- Driveshaft: A custom aluminum driveshaft can reduce weight and improve performance.
- Differential: Upgrade to a stronger rear-end, such as a Ford 8.8 or a custom-built unit.
Supporting Modifications for Power
To reach and sustain 800+ hp, additional modifications are necessary. Here’s a list of supporting mods:
- Forced Induction: Consider a supercharger or turbocharger to increase airflow and boost.
- Fuel System: Upgrade to high-flow injectors and a quality fuel pump to support increased fuel demands.
- Exhaust System: A performance exhaust system will help reduce back pressure and improve flow.
- Engine Management: A standalone ECU or a quality tuning solution is essential for optimizing performance.
Engine Cooling Solutions
With increased power comes the need for better cooling. Here are some recommendations:
- Radiator: Upgrade to a larger, high-performance radiator to manage heat effectively.
- Oil Cooler: An external oil cooler can help maintain optimal oil temperatures.
- Intercooler: If using forced induction, an intercooler is vital for reducing intake temperatures.
Suspension and Handling Upgrades
To harness the power of your LS swap, suspension upgrades are necessary. Consider the following:
- Coilovers: Adjustable coilovers will improve handling and ride quality.
- Anti-roll Bars: Upgrading sway bars can help reduce body roll during cornering.
- Brakes: Upgrade to larger brakes for better stopping power, especially with increased speed.
Final Thoughts
Reaching 800+ horsepower in an RX-7 LS swap is an ambitious yet achievable goal. By focusing on a strong drivetrain, supporting modifications, and proper cooling solutions, you can create a powerful and reliable vehicle. Always remember to tune your setup for optimal performance, and enjoy the thrill of your high-horsepower RX-7!