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The Nissan GT-R is renowned for its performance and engineering excellence. However, for those looking to push the limits beyond 800 horsepower, upgrading engine internals becomes essential. This article explores the critical upgrades necessary to achieve and maintain high horsepower levels while ensuring reliability.
Understanding the Need for Upgrades
As power levels increase, the stress on engine components intensifies. Stock internals may not withstand the pressures of 800+ hp builds, leading to potential failures. Key areas to focus on include:
- Crankshaft
- Pistons
- Rods
- Bearings
- Valvetrain
Crankshaft Upgrades
The crankshaft is the heart of the engine, converting linear motion into rotational motion. For builds exceeding 800 hp, a forged crankshaft is recommended. Key benefits include:
- Increased strength and durability
- Improved balancing capabilities
- Better resistance to torsional stress
Piston Selection
Pistons must be able to handle the increased combustion pressures. Upgrading to high-performance forged pistons is crucial. Considerations include:
- Material: Choose aluminum or steel for strength
- Compression Ratio: Optimize for your setup
- Weight: Lighter pistons can improve engine response
Connecting Rods
Connecting rods link the pistons to the crankshaft. For high horsepower builds, upgrading to forged rods is essential. Benefits include:
- Higher tensile strength
- Resistance to bending and breaking
- Improved reliability under high-stress conditions
Bearings and Lubrication
High-performance bearings are crucial for maintaining oil clearance and reducing friction. Consider the following:
- Use high-quality materials like bi-metal or tri-metal bearings
- Ensure proper clearance for optimal oil flow
- Consider upgraded oil pumps for better lubrication
Valvetrain Enhancements
As power increases, the valvetrain must keep pace. Upgrading components will improve performance and reliability. Key areas to focus on include:
- Camshafts: Consider aftermarket options for improved lift and duration
- Valves: Use lightweight, high-strength materials
- Springs: Upgrade to stiffer springs to prevent valve float
Conclusion
Upgrading the engine internals of a Nissan GT-R for 800+ hp builds is a complex but rewarding process. By focusing on the crankshaft, pistons, connecting rods, bearings, and valvetrain, enthusiasts can achieve reliable performance without compromising the integrity of their engine. Proper planning and quality components are essential for success in this high-performance endeavor.