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The Miata has long been celebrated for its lightweight design and exceptional handling. However, when enthusiasts decide to swap in a powerful LS engine, the game changes significantly. Achieving 450 horsepower from an LS engine in a Miata requires more than just the engine itself; it demands a comprehensive approach to modifications. This article outlines the top supporting mods that will help you maximize performance and reliability in your 450 HP Miata LS swap.
1. Upgraded Headers
One of the first modifications to consider is upgrading your headers. Stock headers can restrict exhaust flow, which limits performance. By installing high-performance headers, you can improve exhaust scavenging, enhance horsepower, and achieve a more aggressive sound.
- Long-tube headers for maximum performance
- Stainless steel construction for durability
- Improved fitment for the Miata chassis
2. High-Performance Exhaust System
After upgrading the headers, the next step is to install a high-performance exhaust system. A free-flowing exhaust will complement the headers and allow for better airflow, which is crucial for maximizing power output. Look for systems that reduce back pressure and provide a deep, throaty sound.
- Cat-back exhaust systems for improved flow
- High-flow catalytic converters
- Lightweight materials to reduce overall weight
3. Upgraded Fuel System
To support a significant power increase, your fuel system must be up to the task. Upgrading your fuel injectors, fuel pump, and fuel lines is essential to ensure that the engine receives the proper amount of fuel at all times. A high-flow fuel pump and larger injectors are crucial for maintaining the correct air-fuel ratio.
- High-flow fuel pump for increased fuel delivery
- Upgraded fuel injectors to match power goals
- AN lines for improved fuel flow
4. Engine Management System
Proper tuning is critical for any LS swap, especially when aiming for 450 HP. An aftermarket engine management system allows for precise tuning of fuel maps, ignition timing, and other parameters. This is essential to ensure that the engine runs efficiently and reliably.
- Standalone ECU for complete control
- Tuning software for custom maps
- Wideband O2 sensors for accurate air-fuel ratio readings
5. Cooling System Upgrades
With the increase in power, effective cooling becomes even more important. Upgrading your cooling system will help maintain optimal engine temperatures and prevent overheating. Consider installing a larger radiator, upgraded fans, and improved coolant hoses.
- High-capacity aluminum radiator
- Electric fans for better airflow
- Performance coolant for improved heat transfer
6. Suspension Upgrades
With the added power comes the need for enhanced handling. Upgrading your suspension will improve stability and cornering performance. Consider adjustable coilovers, sway bars, and upgraded bushings to keep your Miata planted during aggressive driving.
- Coilover suspension for adjustable ride height
- Upgraded sway bars for reduced body roll
- Performance bushings for better responsiveness
7. Drivetrain Strengthening
To handle the increased power, strengthening the drivetrain is essential. Upgrading the transmission, differential, and driveshaft will ensure that your Miata can handle the power without failure. Look for performance parts designed to withstand higher torque and stress.
- Upgraded transmission for better shifting
- Performance differential for improved traction
- Stronger driveshaft to handle increased power
8. Tires and Wheels
Finally, no performance build is complete without the right tires and wheels. Upgrading to wider tires will improve grip and handling. Lightweight wheels can also reduce unsprung weight, enhancing overall performance.
- High-performance tires for better traction
- Lightweight alloy wheels to reduce weight
- Proper sizing for optimal fitment
Conclusion
Achieving 450 HP in a Miata LS swap is an exciting challenge that requires careful planning and execution. By considering these supporting mods, you can ensure that your build is not only powerful but also reliable and enjoyable to drive. Each modification plays a crucial role in maximizing your Miata’s performance, so choose wisely and happy swapping!