Upgrade your engine’s performance with the BBC 4340 Forged Crank - 4.750 Stroke. Designed for high-performance applications, this crankshaft is crafted from premium 4340 chromoly steel, offering exceptional strength, durability, and reliability. Perfect for those looking to build a serious big-block Chevy (BBC) engine, the 4.750 stroke increases displacement for enhanced power output. Whether you're building an engine for drag racing, street performance, or off-road applications, this forged crankshaft delivers the durability needed to withstand extreme conditions and produce maximum power.

Specifications:

• Part Number: BBC 4340 Forged Crank – 4.750 Stroke
• Material: 4340 Chromoly Steel
• Stroke Length: 4.750 inches
• Application: Big Block Chevy (BBC)
• Weight: 66 lbs
• Forging Process: Precision forged for superior strength and reliability
• Balancing: Balanced to OEM specifications
• Journal Size: Customizable to fit different bearing sizes
• Finish: Machined and polished for smooth operation and high performance

Features:

• Premium 4340 Forged Steel: The crank is constructed from 4340 chromoly steel, offering high tensile strength and resistance to fatigue. This makes it perfect for high-horsepower engines that endure extreme stress.
• Increased Stroke for More Power: With a 4.750-inch stroke, this crank increases the displacement of your engine, resulting in improved torque and power throughout the RPM range.
• Balanced for Performance: The crankshaft is balanced to OEM specifications to reduce vibrations, improving engine smoothness and extending the lifespan of other engine components.
• Ideal for High-Performance Engines: Whether you're building an engine for street performance, drag racing, or heavy-duty applications, this crankshaft provides the strength needed for demanding conditions.
• Durable Finish: The crankshaft is precision machined and polished, ensuring smooth operation and reducing friction for greater performance.

Benefits:

• Increased Displacement & Power: The 4.750 stroke provides more displacement, allowing for better torque and power, especially at lower RPMs.
• Durability for High-Performance Builds: The 4340 forged steel construction ensures maximum durability, able to handle high levels of stress and pressure in high-performance setups.
• Reliable Strength: Built to withstand extreme conditions, this crankshaft is perfect for applications requiring high reliability and strength.
• Smooth Performance: Precision balancing ensures minimal vibration, enhancing engine smoothness and longevity.

Installation Instructions:

1. Begin by ensuring your engine block is clean and free of debris.
2. Carefully remove any old crankshaft and related components.
3. Install the BBC 4340 Forged Crank into the engine block, ensuring it is properly aligned with the bearings.
4. Torque all the components to the manufacturer’s specifications.
5. Perform a final check for proper installation, ensuring the crank spins freely with no obstructions or issues.
6. After installation, perform a test run of the engine to ensure everything is functioning correctly.

Maintenance Tips:

• Regularly check the crankshaft for any signs of wear or fatigue, especially after high-performance use.
• Keep the engine oil clean and at optimal levels to ensure proper lubrication of the crankshaft and engine components.
• If you notice any vibrations or unusual noises, stop the engine immediately and inspect the crank for issues.
• During rebuilds or performance upgrades, consider replacing bearings to maintain optimal engine performance.