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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 further by swapping in a powerful LS engine. This article will guide you through a cost-effective RX-7 LS swap, focusing on building 450 horsepower on a budget using parts from Summit Racing.
Why Choose an LS Swap for Your RX-7?
The LS engine family offers numerous benefits for RX-7 enthusiasts, including:
- Availability of parts and aftermarket support
- High power output potential
- Lightweight design compared to other engine options
- Reliability and ease of tuning
Essential Parts for Your LS Swap
To successfully complete an LS swap in your RX-7, you will need several key components. Here’s a breakdown of the essential parts you should consider:
- LS Engine: Choose an LS1, LS2, or LS3 engine based on your budget and desired power level.
- Transmission: A T56 manual transmission is a popular choice for its strength and performance.
- Engine Mounts: Summit Racing offers engine mount kits specifically designed for RX-7 LS swaps.
- Headers: Long-tube headers can help improve exhaust flow and increase power.
- Fuel System: An upgraded fuel pump and injectors are necessary to support the increased horsepower.
- Cooling System: A high-performance radiator and cooling fans will help keep your engine temperature in check.
Step-by-Step Guide to the LS Swap
1. Preparation
Before starting the swap, ensure you have a clean workspace and all necessary tools. Gather your parts and review the installation manual for your engine and transmission.
2. Remove the Old Engine
Begin by disconnecting the battery and draining fluids. Remove the old engine and transmission, taking care to label all wiring and hoses for easier reinstallation.
3. Install the LS Engine
Using the engine mount kit, position the LS engine into the RX-7 chassis. Ensure proper alignment with the transmission tunnel and firewall. Secure the engine mounts and transmission to the chassis.
4. Connect the Fuel System
Install the upgraded fuel pump and injectors. Ensure that all fuel lines are properly connected and leak-free. Verify that the fuel system can support the engine’s power demands.
5. Wiring and Electronics
Integrate the LS engine’s wiring harness with the RX-7’s electrical system. Use a standalone engine management system if necessary to control the engine effectively.
6. Exhaust Installation
Install the long-tube headers and connect them to the exhaust system. Ensure proper clearance and fitment to avoid any potential issues.
7. Cooling System Setup
Install the high-performance radiator and cooling fans. Make sure to connect all hoses securely and check for leaks.
8. Final Checks and Testing
Before starting the engine, double-check all connections, fluid levels, and wiring. Once everything is confirmed, reconnect the battery and start the engine. Monitor for any issues and address them accordingly.
Budgeting Your LS Swap
Building a 450 horsepower RX-7 on a budget requires careful planning. Here are some tips to help you manage your costs:
- Shop for used parts when possible to save money.
- Compare prices from different suppliers, including Summit Racing.
- Consider doing the work yourself to save on labor costs.
- Prioritize essential upgrades first, and add performance parts later as budget allows.
Conclusion
Swapping an LS engine into your RX-7 can significantly enhance its performance and driving experience. By following this guide and utilizing cost-effective parts from Summit Racing, you can achieve 450 horsepower without breaking the bank. Happy swapping!