What is the primary benefit of using a forged 4340 steel crankshaft?

Forged 4340 steel offers superior strength and durability compared to cast iron, making it ideal for high-performance engines that experience higher stresses and RPMs. This material helps prevent crankshaft failure under demanding conditions.

What does 'micro-polished journals' mean for engine performance?

Micro-polishing creates an extremely smooth surface on the crankshaft journals. This smooth finish reduces friction between the journal and the bearing, leading to improved efficiency, less heat buildup, and potentially longer bearing life.

What is the purpose of lightened rod journals?

Lightening the rod journals helps to reduce the overall rotating mass of the crankshaft. This can lead to improved engine response and allow the engine to rev more freely, contributing to better overall performance, especially in racing applications.

Specifications

Brand: Manley Performance
Part #: 190370
UPC: 807298102115

Manley Ford 4.6L Pro Series Modular Crankshaft 3.800in Stroke

Name: Manley Ford 4.6L Pro Series Modular Crankshaft 3.800in Stroke
Brand: Manley Performance
SKU: manley-performance-manley-ford-4-6l-pro-series-modular-crankshaft-3-800in-stroke-t14-93283
Price: 1470.25 USD
Availability: BackOrder

$1470.25

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Manley Ford 4.6L Pro Series Modular Crankshaft 3.800in Stroke. Forged 4340 steel construction for improved strength and longevity.

Key Features

Fits Ford 4.6L modular engines.
Features a 3.800-inch stroke for increased displacement.
Manufactured from forged 4340 alloy steel for enhanced strength.
Includes lightened rod journals for optimized engine balance.
Counterweights are fully profiled for precise balance and stability.
Undergoes a multi-step heat treatment and nitriding process for improved strength and longevity.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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About this part

Product Details

If you're building a high-performance Ford 4.6L modular engine, a strong crankshaft is the foundation of your build. This Manley Pro Series crankshaft is designed to handle the demands of a performance engine, offering a 3.800-inch stroke to increase displacement and potential power output. It's a critical component for anyone looking to get the most out of their modular Ford V8.

Manley crafts this crankshaft from forged 4340 alloy steel, a material known for its exceptional strength and durability, especially under high stress. To further enhance its performance and longevity, it features lightened rod journals, which help optimize engine balance and reduce rotational mass. The counterweights are carefully profiled for precise balance, ensuring smooth operation even at high RPMs. A multi-step heat treatment process and nitriding are applied to significantly boost the crankshaft's strength and resistance to wear, making it a solid choice for demanding builds. The journals themselves are micro-polished with large radii, which not only reduces friction but also contributes to improved overall engine performance and efficiency.

Every Manley Pro Series crankshaft goes through a rigorous quality assurance process. This includes stress relief, shot peening for improved fatigue strength, and 100% magnafluxing to detect any potential flaws. This attention to detail ensures that each crankshaft meets Manley's high standards for reliability and performance. When building a serious modular Ford engine, starting with a well-made crankshaft like this one sets you up for success.