Building a 700 Hp Miata Ls Swap: Turbocharged Ls3 and Reinforced Drivetrain

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Building a high-performance Miata with a turbocharged LS3 engine is an exciting project for car enthusiasts. With the right modifications, you can achieve an impressive 700 horsepower. This article will guide you through the essential steps to successfully complete an LS swap in your Miata, focusing on the turbocharged LS3 engine and a reinforced drivetrain.

Understanding the LS3 Engine

The LS3 is a powerful engine that originated from the Chevrolet Corvette. It is known for its robust performance and tuning potential. Here are some key features of the LS3:

  • 6.2L V8 engine
  • Maximum horsepower: 430 hp
  • Torque: 425 lb-ft
  • Aluminum block and heads for reduced weight

Choosing the Right Turbocharger

To reach 700 horsepower, a suitable turbocharger is crucial. Consider the following options:

  • Garrett GT3582R
  • Precision 6266
  • Holset HX40

Each of these turbochargers has its strengths, and the choice will depend on your specific performance goals and budget.

Reinforcing the Drivetrain

With the increased power from the LS3 engine, reinforcing the drivetrain is essential to handle the added stress. Key components to upgrade include:

  • Transmission: Consider a T56 or a built 4L60E for better power handling.
  • Driveshaft: Upgrade to a stronger driveshaft to prevent failure.
  • Differential: A limited-slip differential will help manage power delivery to the wheels.

Engine Mounts and Installation

Proper engine mounts are vital for a successful LS swap. You can either purchase pre-made mounts or fabricate your own. Ensure that:

  • The engine is positioned low enough for hood clearance.
  • The mounts can handle the torque and vibrations of the LS3.

Cooling System Upgrades

With the increased power, an efficient cooling system is necessary to prevent overheating. Consider these upgrades:

  • High-performance radiator
  • Upgraded water pump
  • Oil cooler for enhanced engine protection

Fuel System Enhancements

To support 700 horsepower, your fuel system must be capable of delivering enough fuel. Focus on these components:

  • High-flow fuel injectors
  • Upgraded fuel pump
  • Fuel pressure regulator to maintain consistent pressure

Tuning for Performance

Once the installation is complete, proper tuning is essential to maximize performance. Consider the following:

  • Use a standalone engine management system for optimal control.
  • Dyno tuning to ensure the engine runs efficiently.
  • Monitor air-fuel ratios and boost levels to avoid engine damage.

Testing and Fine-Tuning

After tuning, it’s crucial to test your Miata on the track or a controlled environment. Pay attention to:

  • Handling and traction during acceleration
  • Temperature readings for the engine and transmission
  • Overall performance metrics

Conclusion

Building a 700 horsepower Miata with an LS3 engine swap is a challenging yet rewarding project. With the right components and careful planning, you can achieve incredible performance while maintaining the lightweight characteristics of the Miata. Always remember to prioritize safety and reliability in your build.