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The RX-7 is a beloved sports car known for its lightweight design and agile handling. However, many enthusiasts seek to enhance its performance by swapping in a more powerful engine. One popular option is the LS engine, renowned for its reliability and aftermarket support. This article explores how to achieve a cost-effective RX-7 LS swap using remanufactured LS engines and budget-friendly modifications.
Understanding the LS Engine
The LS engine family, developed by General Motors, includes a range of V8 engines known for their performance and efficiency. These engines are widely used in various GM vehicles and have become a popular choice for engine swaps due to their availability and aftermarket support.
Benefits of Using Remanufactured LS Engines
Opting for a remanufactured LS engine can provide numerous advantages:
- Cost Savings: Remanufactured engines are often significantly cheaper than brand new ones.
- Quality Assurance: These engines are rebuilt to meet or exceed OEM specifications, ensuring reliability.
- Environmental Impact: Using remanufactured parts reduces waste and promotes sustainability.
Preparing for the Swap
Before diving into the LS swap, it’s crucial to prepare adequately. This involves gathering the necessary tools, parts, and knowledge to ensure a smooth installation.
Essential Tools and Equipment
- Engine hoist
- Socket set and wrenches
- Torque wrench
- Jack stands
- Floor jack
- Basic hand tools
Parts Needed for the Swap
- Remanufactured LS engine
- LS engine mounts specific to RX-7
- Transmission adapter plate
- Custom driveshaft
- ECU and wiring harness
- Fuel system upgrades
Performing the Swap
With preparations complete, it’s time to perform the swap. Follow these steps to ensure a successful installation.
Removing the Old Engine
Start by disconnecting the battery and draining the fluids. Next, remove the old engine by following these steps:
- Detach the exhaust system.
- Disconnect all electrical connections.
- Remove the radiator and cooling system components.
- Unbolt the engine from the transmission.
- Use the engine hoist to lift the old engine out of the engine bay.
Installing the Remanufactured LS Engine
Once the old engine is out, it’s time to install the remanufactured LS engine. Follow these steps:
- Position the LS engine in the engine bay using the engine hoist.
- Secure the engine mounts to the chassis.
- Connect the transmission to the engine.
- Reinstall the exhaust system, ensuring proper fitment.
- Reconnect all electrical connections and install the ECU.
Supporting Modifications for Performance
To maximize the performance of your LS-swapped RX-7, consider implementing some budget-friendly modifications.
Upgrading the Fuel System
With the increased power of the LS engine, the stock fuel system may not suffice. Upgrading the fuel pump and injectors is essential:
- Install a high-flow fuel pump.
- Upgrade to larger fuel injectors.
- Consider a fuel pressure regulator for optimal performance.
Improving the Cooling System
Proper cooling is vital for engine performance and longevity. Upgrading the cooling system can help:
- Install a larger aftermarket radiator.
- Upgrade to high-performance cooling fans.
- Consider adding an oil cooler for better temperature management.
Enhancing Exhaust Flow
Improving exhaust flow can significantly boost performance. Consider these modifications:
- Install long-tube headers for better exhaust flow.
- Upgrade to a high-flow catalytic converter.
- Use a performance cat-back exhaust system for improved sound and performance.
Conclusion
Swapping an LS engine into an RX-7 can be a rewarding project that enhances performance while maintaining a budget. By utilizing remanufactured LS engines and making smart modifications, enthusiasts can enjoy a powerful and reliable sports car. With careful planning and execution, the RX-7 LS swap can provide thrilling driving experiences for years to come.