Eagle Ford 351W 4.000in Crank 6.200in H-Beam -15.8cc 4.040in Pistons Rotating Assembly

This is a complete rotating assembly from Eagle for a Ford 351 Windsor engine. It includes a 4.000-inch stroke crankshaft, 6.200-inch H-beam connecting rods, and pistons sized for a 4.040-inch bore with a -15.8cc dish. This assembly is designed to give your 351W a significant displacement increase, moving it towards a 408 cubic inch engine, and is built for performance applications where strength and reliability are key.

The crankshaft is forged from 4340 steel, a strong material commonly used in high-performance engine builds. It features a 4.000-inch stroke, which is longer than the stock 3.50-inch stroke, increasing displacement. The H-beam connecting rods are also forged from 4340 steel and are known for their robust design, capable of handling higher RPMs and increased cylinder pressures compared to stock rods. The included pistons are designed for a 4.040-inch bore and have a -15.8cc dish volume, which helps achieve a desired compression ratio when paired with appropriate cylinder heads. This assembly is a well-built foundation for a performance or stroker engine build.

When installing this rotating assembly, it's crucial to ensure all components are properly balanced by a professional machine shop. This includes balancing the complete rotating assembly (crankshaft, rods, pistons, rings, bearings, and flexplate/flywheel) to your specific application. Proper balancing is essential for engine longevity and smooth operation, especially at higher RPMs. Ensure you also have the correct main and rod bearings, piston rings, and wrist pins, as these are typically purchased separately to match your specific build requirements and clearances.