Table of Contents
The Mazda RX-7 is a beloved sports car known for its lightweight design and rotary engine. However, many enthusiasts have turned to the LS swap as a way to enhance performance and drivability. In this article, we will compare the power gains and drivability of an RX-7 with an LS swap against the stock rotary engine.
Understanding the RX-7 and Its Rotary Engine
The RX-7, produced from 1978 to 2002, is famous for its unique rotary engine, which offers a high power-to-weight ratio and a distinctive driving experience. The stock engine, depending on the model year, typically produces between 100 to 280 horsepower, depending on the variant.
The LS Engine: An Overview
The LS engine family, originating from General Motors, has gained popularity for its robust performance and tunability. With a variety of configurations, LS engines can produce anywhere from 300 to over 600 horsepower, making them a compelling choice for performance enthusiasts.
Power Gains: RX-7 LS Swap vs Stock
When comparing power gains, the differences between an LS swapped RX-7 and a stock model are significant. Here are some key points to consider:
- Horsepower Increase: An LS swap can increase horsepower significantly, often exceeding 400 horsepower with basic modifications.
- Torque Benefits: LS engines provide a substantial increase in torque, enhancing acceleration and overall performance.
- Reliability: The LS engine is known for its durability and reliability, often outlasting the stock rotary engine.
Drivability: Comparing Experiences
Drivability is a crucial aspect for many enthusiasts. The driving experience between a stock RX-7 and one with an LS swap can vary dramatically:
- Throttle Response: LS engines often provide a more linear throttle response compared to the rotary engine, which can feel more peaky.
- Daily Driving: An LS swapped RX-7 can be more suitable for daily driving due to its torque and power delivery.
- Weight Distribution: The weight of the LS engine can affect the car’s balance, which may require suspension adjustments.
Cost Considerations
Cost is a significant factor when deciding between keeping a stock RX-7 or performing an LS swap. Here’s a breakdown of typical expenses:
- Engine Cost: An LS engine can range from $2,000 to $10,000 depending on the condition and configuration.
- Swap Kit: A proper swap kit can cost between $1,500 and $3,000, including necessary mounts and transmission adapters.
- Labor Costs: If you’re not doing the work yourself, labor can add another $1,000 to $5,000 to the project.
Performance Modifications
Both stock and LS swapped RX-7s can benefit from performance modifications. Here are some popular options:
- Exhaust System: Upgrading to a high-performance exhaust can improve airflow and enhance sound.
- Tuning: Proper tuning is essential for maximizing performance and drivability, especially with an LS swap.
- Suspension Upgrades: Improved suspension components can enhance handling characteristics.
Conclusion: Which is Right for You?
Ultimately, the choice between an RX-7 with an LS swap and a stock rotary engine comes down to personal preference and intended use. If you prioritize raw power and reliability, the LS swap may be the way to go. However, if you appreciate the unique characteristics of the rotary engine, maintaining it could be more rewarding.
Consider your goals, budget, and driving style when making this decision. Both options offer unique advantages, making the RX-7 a versatile platform for performance enthusiasts.