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Building a high-performance engine with over 700 horsepower is an exciting venture for car enthusiasts. The LS and HEMI platforms offer incredible potential for power, but to ensure reliability, supporting modifications are essential. This article delves into the key supporting mods needed for both LS and HEMI builds, focusing on fuel systems, ignition systems, and other crucial components.
The Importance of Supporting Mods
When pushing an engine to its limits, it’s vital to ensure that all components work harmoniously. Supporting mods enhance the performance of the engine while maintaining reliability. A well-rounded approach includes upgrades to the fuel system, ignition system, cooling system, and exhaust system.
Fuel System Upgrades
The fuel system is one of the most critical areas to focus on when building a 700+ hp engine. Proper fuel delivery ensures that the engine receives the right amount of fuel for optimal performance.
Fuel Pumps
Upgrading to a high-flow fuel pump is essential for both LS and HEMI builds. A pump that can deliver sufficient fuel pressure and volume is necessary to support high horsepower levels.
- Consider fuel pumps capable of supporting 700+ hp.
- Look for pumps with adjustable pressure settings.
Fuel Injectors
High-flow fuel injectors are critical for ensuring that the engine receives enough fuel during high-demand situations. Selecting the right size and type of injectors can significantly affect performance.
- Choose injectors rated for at least 1000cc/min.
- Consider direct injection for improved efficiency and power.
Fuel Lines and Rails
Upgrading the fuel lines and rails can help reduce restrictions and improve fuel flow. Larger diameter lines and high-quality rails are recommended for high horsepower applications.
- Use AN fittings and lines for better reliability.
- Ensure rails are compatible with high-flow injectors.
Ignition System Enhancements
A robust ignition system is crucial for igniting the air-fuel mixture efficiently, especially in high-performance builds. Upgrading components in this system can lead to more reliable starts and improved throttle response.
Ignition Coils
High-performance ignition coils can deliver a stronger spark, which is essential for combustion in high-horsepower engines. Replacing stock coils with upgraded options can enhance reliability.
- Look for coils designed for high-performance applications.
- Consider coil-on-plug (COP) setups for better efficiency.
Spark Plugs
Choosing the right spark plugs is vital for optimal performance. High-performance spark plugs can withstand higher temperatures and pressures, making them ideal for 700+ hp builds.
- Select plugs with a higher heat range for better performance.
- Consider iridium or platinum plugs for longevity.
Cooling System Improvements
With increased horsepower comes the need for better cooling. An efficient cooling system helps prevent overheating and maintains optimal engine temperatures during operation.
Radiators
Upgrading to a high-performance radiator can significantly improve cooling efficiency. Look for radiators designed for high horsepower applications to handle the increased heat.
- Consider aluminum radiators for better heat dissipation.
- Check for compatibility with your engine setup.
Cooling Fans
High-performance cooling fans can enhance airflow through the radiator, helping to keep engine temperatures in check. Electric fans are often preferred for their efficiency and reliability.
- Choose fans with a higher CFM rating for better airflow.
- Consider dual-fan setups for improved cooling capacity.
Exhaust System Upgrades
The exhaust system plays a crucial role in engine performance. Upgrading to a high-flow exhaust system can improve exhaust gas evacuation, leading to better power output.
Headers
Aftermarket headers can significantly improve exhaust flow and reduce back pressure. Choosing the right headers for your engine can enhance performance and sound.
- Consider long-tube headers for maximum performance.
- Ensure proper fitment with your chassis and engine.
Cat-Back Systems
A cat-back exhaust system can improve overall exhaust flow and provide a more aggressive sound. Look for systems designed for high-performance applications to maximize benefits.
- Choose stainless steel for durability and corrosion resistance.
- Check for compatibility with your headers and downpipes.
Conclusion
Building a 700+ hp LS or HEMI engine requires careful consideration of supporting mods to ensure reliability and performance. By upgrading the fuel system, ignition system, cooling system, and exhaust system, enthusiasts can create a powerful and dependable engine setup. Proper planning and execution of these modifications will lead to an exhilarating driving experience.