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The Miata has long been celebrated for its lightweight chassis and exceptional handling. However, enthusiasts often seek to enhance its performance further by swapping in more powerful engines. One of the most popular swaps is the LS engine, particularly the LS7, which offers a blend of power and reliability. In this article, we will break down the costs associated with a fully built 650 HP Miata LS swap, focusing on the LS7 engine and a high-flow exhaust system.
Understanding the LS7 Engine
The LS7 is a high-performance engine produced by General Motors, known for its robust design and impressive output. With a displacement of 7.0 liters and a factory rating of 505 horsepower, it is an excellent choice for those looking to push their Miata to the limits. The LS7’s lightweight aluminum construction and advanced engineering make it a favorite among performance enthusiasts.
Cost Breakdown of the LS7 Swap
When considering an LS7 swap for a Miata, it’s essential to account for various components and labor costs. Below is a detailed breakdown of the expected expenses associated with a fully built 650 HP Miata LS swap.
- LS7 Engine: $15,000 – $20,000
- Transmission: $3,000 – $5,000
- Engine Management System: $1,500 – $2,500
- Wiring Harness: $500 – $1,000
- High-Flow Exhaust System: $1,200 – $2,000
- Custom Mounts and Adapters: $1,000 – $1,500
- Cooling System: $800 – $1,200
- Fuel System Upgrades: $600 – $1,000
- Drivetrain Upgrades: $2,000 – $4,000
- Labor Costs: $2,500 – $5,000
Detailed Component Costs
LS7 Engine
The LS7 engine is the heart of this swap and comes with a significant price tag. Depending on the source, prices can vary widely. A new or rebuilt LS7 can range from $15,000 to $20,000. It’s crucial to ensure that the engine is in excellent condition to avoid additional costs down the line.
Transmission
Pairing the LS7 with a suitable transmission is vital for performance. Options like the T56 or a 6-speed manual transmission are popular choices. The cost for a quality transmission can range from $3,000 to $5,000, depending on the model and condition.
Engine Management System
A robust engine management system is essential for tuning and optimizing the LS7’s performance. Expect to spend between $1,500 and $2,500 on a reliable ECU and tuning software.
Wiring Harness
A custom wiring harness is necessary to integrate the LS7 with the Miata’s electrical system. This can cost around $500 to $1,000, depending on whether you choose a pre-made or custom solution.
High-Flow Exhaust System
To maximize power output, a high-flow exhaust system is crucial. These systems can range from $1,200 to $2,000, depending on the materials and design. Investing in a quality exhaust will not only enhance performance but also improve sound.
Custom Mounts and Adapters
To fit the LS7 into the Miata, custom mounts and adapters are required. These can cost between $1,000 and $1,500, depending on the complexity of the design and fabrication.
Cooling System
A proper cooling system is essential to handle the increased power of the LS7. Upgrading the radiator and cooling components can cost between $800 and $1,200.
Fuel System Upgrades
To support the LS7’s fuel demands, upgrades to the fuel system are necessary. This includes high-flow fuel pumps and injectors, costing around $600 to $1,000.
Drivetrain Upgrades
The Miata’s stock drivetrain may not handle the LS7’s power without upgrades. Expect to spend between $2,000 and $4,000 on components like differentials, axles, and driveshafts to ensure reliability.
Labor Costs
Finally, labor costs can vary significantly based on the shop’s expertise and location. Budget between $2,500 and $5,000 for professional installation and tuning services.
Total Estimated Cost
When you add up all the components and labor, the total estimated cost for a fully built 650 HP Miata LS swap with an LS7 engine and high-flow exhaust can range from approximately $30,000 to $50,000. This investment will yield a high-performance vehicle that combines the agility of the Miata with the raw power of the LS7.
Conclusion
The LS7 swap in a Miata is a thrilling project that can provide exhilarating performance. However, it requires careful planning and budgeting to ensure a successful outcome. By understanding the costs involved, enthusiasts can make informed decisions and create a powerful, reliable vehicle that stands out on the road.