What is the purpose of the damper in these valve springs?

The damper is designed to reduce spring surge and resonance. This helps prevent valve float at high engine speeds, leading to more consistent valve control and improved engine reliability.

Are these springs suitable for any performance camshaft?

These springs are intended for high-performance engine builds and aggressive camshaft profiles. It is essential to match these springs with your specific camshaft's requirements, including lift and spring pressure recommendations, to ensure proper function and prevent damage.

What is included in this set?

This set includes 16 dual valve springs, which is typically enough for a V8 engine. You will need to ensure you have compatible retainers and other necessary valvetrain components for installation.

Specifications

Brand: Ferrea
Part #: S11011

Ferrea 1.225in to 1.570in Dia 1.04/1.56 OD 0.74/1.145 ID Dual w/Damper Valve Spring - Set of 16

Name: Ferrea 1.225in to 1.570in Dia 1.04/1.56 OD 0.74/1.145 ID Dual w/Damper Valve Spring - Set of 16
Brand: Ferrea
SKU: ferrea-ferrea-1-225in-to-1-570in-dia-1-04-1-56-od-0-74-1-145-id-dual-w-damper-va-t14-419211
Price: 889.04 USD
Availability: BackOrder

$889.04

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Ferrea dual valve springs with damper. Set of 16. For high-performance engine builds.

Key Features

Set of 16 dual valve springs with integrated damper.
Inner spring diameter ranges from 1.225 inches to 1.570 inches.
Outer spring diameters are 1.04 inches and 1.56 inches.
Inner spring inner diameter is 0.74 inches and outer spring inner diameter is 1.145 inches.
Dual-rate design provides controlled valve motion at high RPM.
Damper helps reduce spring surge and resonance for improved valve control.

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About this part

Product Details

These Ferrea dual valve springs, part number S11011, are built with a unique dual-rate design featuring a damper. This construction allows for precise control over valve motion, especially at higher engine speeds. The springs are designed to manage the forces involved in performance camshafts and aggressive engine builds, ensuring reliable valve operation under demanding conditions. The dual-rate setup means the spring's stiffness changes throughout its travel, providing a softer seat pressure for durability and a much stiffer open pressure to control the valve against inertia.

The specific dimensions of these springs are notable: an inner spring diameter ranging from 1.225 inches to 1.570 inches, with outer diameters of 1.04 inches and 1.56 inches respectively. The inner and outer spring inner diameters are 0.74 inches and 1.145 inches. This precise sizing is critical for proper fitment and function within the cylinder head. The included damper helps to reduce spring surge and resonance, which can be a problem in high-RPM applications, leading to improved valve control and preventing potential valve float. This set includes 16 springs, enough for a typical V8 engine.

When undertaking a performance engine build, selecting the right valve springs is crucial for achieving your goals and ensuring the longevity of your engine. These Ferrea springs are a well-built option for those looking to push their engine's capabilities. It's important to consult your camshaft manufacturer's specifications to ensure these springs are the correct match for your chosen cam profile and intended engine use. Proper installation, including verifying retainer compatibility and spring installed height, is key to their performance and durability.