Eagle Chevrolet Big Block Forged Crankshaft

Eagle is well-known for building strong rotating assembly components, and this forged 4340 steel crankshaft for Chevrolet big block engines is a prime example. If you're building a high-performance engine that needs to handle serious power and high RPMs, this crankshaft is designed to meet those demands. It’s built for the most demanding applications, offering a solid foundation for your engine build.

This crankshaft features a non-twist forging made from 4340 steel, which is a strong material chosen for its durability under stress. The center counterweights are a notable feature, adding stability when the engine is spinning at high RPMs. This design helps to keep the crankshaft running smoothly and reduces stress on the entire rotating assembly. It has a 4.750-inch stroke and is internally balanced, making it suitable for a wide range of performance builds. The fillet radii are 1.250 inches, which adds to its overall strength, but it means you'll need chamfered or narrowed bearings for proper fitment.

To ensure maximum longevity and performance, this crankshaft has a nitrided surface treatment and is micropolished. The nitride treatment hardens the surface, making it more resistant to wear and fatigue, while the micropolishing creates an exceptionally smooth finish for reduced friction and improved oil flow. This level of attention to detail is crucial for an engine component that will be subjected to high stress. Remember that due to the 1.250-inch fillet radii, you will need to use chamfered or narrowed bearings for installation.