Eagle Steel Crankshaft 4.5115R Fast Action Engine Component Silver

Description

Product Overview

The Eagle steel crankshaft model 4.5115R is a precision‑engineered component designed for high‑performance automotive engines that demand reliability, strength, and speed. Constructed from high‑grade steel, the crankshaft offers a robust platform that resists wear and deformation under extreme loads. Its 4.000 inch stroke provides a balanced combination of torque and rpm capability, while the 6.123 inch minimum rod length ensures optimal leverage and reduced side‑load on connecting rods. The 2.125 inch rod journal is machined to tight tolerances, delivering smooth rotation and minimizing friction. Standard oiling channels are incorporated to maintain consistent lubrication across all bearings, extending service life and preventing overheating. Internal balance is achieved through meticulous mass distribution, reducing vibration and enhancing engine smoothness. The component weighs 55.5 pounds and measures 32 x 9 x 9 inches, fitting within standard engine bays without modification. A cork‑wrapped handle offers ergonomic grip for technicians during installation, allowing precise positioning and reducing hand fatigue. Manufactured by Eagle Specialty Products, the crankshaft carries the OEM part number 436040006123 and complies with industry standards for performance engine crankshafts.

Usage

This crankshaft excels in a variety of performance‑oriented environments, from street‑legal sports cars to track‑day racers. It is ideal for engine rebuilds where increased power output and durability are paramount. The fast‑action design supports rapid acceleration, making it a preferred choice for drag racing applications and high‑speed circuit use. Installation is straightforward for experienced mechanics, thanks to the clearly marked orientation marks and the cork handle that provides secure leverage during the torquing process. The component’s internal balance reduces harmonic vibrations, which is especially beneficial in engines equipped with high‑lift camshafts or aggressive valve timing. Whether the engine is a naturally aspirated V8, a turbocharged inline‑six, or a custom‑built race engine, the Eagle crankshaft adapts seamlessly, delivering consistent performance across a broad range of RPMs. Its steel construction also tolerates the elevated temperatures generated by forced induction systems, ensuring reliable operation during prolonged high‑load conditions.

Why Choose Us

Choosing the Eagle steel crankshaft means selecting a component backed by decades of engineering expertise and a commitment to quality assurance. Eagle Specialty Products employs rigorous testing protocols, including dynamic balancing, fatigue testing, and dimensional verification, to guarantee that each crankshaft meets exacting performance criteria. The use of premium steel not only provides superior tensile strength but also enhances resistance to corrosion, extending the lifespan of the engine. Our manufacturing process incorporates CNC machining for precision tolerances, ensuring that every journal surface is perfectly round and concentric. In addition, Eagle offers comprehensive after‑sales support, including technical assistance for installation, maintenance guidance, and a warranty that covers material defects. Customers benefit from a responsive service team that can address questions quickly, helping to minimize downtime and keep the engine running at peak efficiency. By investing in this crankshaft, you gain a reliable foundation for power upgrades, improved engine response, and long‑term reliability that competitive aftermarket alternatives often cannot match.

Key Features

• High‑grade steel construction delivers exceptional strength and wear resistance for demanding power applications.
• 4.000 inch stroke and 6.123 inch rod length provide optimal torque and leverage, enhancing acceleration.
• Internal balance reduces engine vibration, improving smoothness and extending component life.
• Cork‑wrapped handle offers ergonomic grip for easy installation and precise positioning.
• Comprehensive after‑sales support and warranty ensure confidence and assistance throughout the product lifecycle.

FAQ

What engines are compatible with the Eagle 4.5115R crankshaft?

The 4.5115R crankshaft is designed to fit a wide range of high‑performance engines, including V8, V6, and inline‑six configurations commonly found in performance street cars and race vehicles. Compatibility is determined by bore spacing, rod length, and journal dimensions, all of which match standard specifications for many popular engine families. For exact fitment, consult the engine’s service manual or contact our technical support team with your engine model details.

How does the internal balance affect engine performance?

Internal balance is achieved by carefully distributing mass within the crankshaft to counteract rotating forces. This reduces harmonic vibrations that can cause premature wear on bearings, pistons, and connecting rods. A well‑balanced crankshaft leads to smoother engine operation, higher RPM capability, and improved fuel efficiency because the engine does not have to work against excessive vibration. In high‑performance applications, this translates to more consistent power delivery and a longer service interval.

Can the cork handle be replaced or upgraded?

Yes, the cork handle is a removable component designed for ease of replacement. If you prefer a different material, such as a rubber or composite grip, aftermarket adapters are available that thread onto the same mounting points. Replacing the handle does not affect the crankshaft’s structural integrity, and it allows you to customize the installation experience to suit personal preferences or specific workshop requirements.

What maintenance is recommended to keep the crankshaft in optimal condition?

Regular oil changes using high‑quality synthetic engine oil are essential to maintain proper lubrication of the crankshaft bearings. Inspect the oil for metal particles during each service interval, as this can indicate wear. Additionally, check the torque specifications on the main bearing caps during engine rebuilds and ensure that the oil passages remain clear of debris. Following the manufacturer’s recommended break‑in procedure for new crankshafts will also help achieve the best long‑term performance.

Is there a warranty on the Eagle crankshaft?

Eagle Specialty Products provides a limited warranty that covers material defects and manufacturing errors for a period of one year from the date of purchase. The warranty does not cover damage resulting from improper installation, misuse, or modifications that deviate from the original design specifications. For warranty claims, retain the original packaging, purchase receipt, and any installation documentation to expedite the process.