SPEED PRO VS-780R-8 Double Valve Spring 283-400

( Brand: Speed Pro ), ( Manufacturer Part Number: VS-780R-8 ), ( Part Type: Valve Spring )

Review SPEED PRO Double Valve Spring For Chevrolet Sbc fits VS-780R 1957–1977

Introducing the PRO Comp Performance VS-780R Double Valve Spring Kit, an essential upgrade for your 1957 to 1977 Chevrolet 283-400 engine. This high-performance spring set is designed to provide superior reliability and longevity, making it an ideal choice for racers, hot rodders, and enthusiasts seeking to maximize power and engine response.

The VS-780R Double Valve Spring Kit is meticulously crafted using heat-treated, chrome silicon alloy material. Each spring is precisely engineered to deliver increased valve control, reduced valve float, and improved sealing. The double valve spring design ensures consistent valve function under high RPM and boosted power conditions, preventing valve train damage and improving overall engine performance.

This kit includes eight complete valve spring sets, each consisting of an inner, outer, and retainer. The heavy-duty outer springs are specifically designed to provide the necessary clamping force to maintain valve clearance under increased engine loads. The inner springs, on the other hand, ensure proper valve seating and provide the initial compression force.

The VS-780R Double Valve Spring Kit is compatible with factory and aftermarket camshafts and lifters. It is also designed to work seamlessly with stock or aftermarket rocker arms and pushrods. The springs are available in various tensions to accommodate different engine configurations and power levels.

Installing the VS-780R Double Valve Spring Kit is a straightforward process, requiring only standard hand tools. A detailed installation guide is provided with each kit, ensuring a hassle-free installation experience.

In summary, the PRO Comp Performance VS-780R Double Valve Spring Kit is an excellent investment for any Chevrolet 283-400 engine seeking improved performance, reliability, and durability. With its high-quality materials, precise engineering, and easy installation, this spring kit is a must-have for any serious enthusiast or racer. Upgrade your engine today with the PRO Comp Performance VS-780R Double Valve Spring Kit.

Pros and Cons of Buying a ProComp R780R-8 or R780R Double Valve Spring for 1957-1977 Chevrolet 283-400 Engines

The decision to upgrade the stock valve springs on a 1957-1977 Chevrolet 283-400 engine with aftermarket options like the ProComp R780R-8 or R780R double valve springs involves careful consideration of their benefits and drawbacks. In this analysis, we will discuss the pros and cons of each spring to help you make an informed decision.

1. High Load Capacity: The R780R-8 springs can handle increased engine power and provide better valve control, reducing the chances of valve float and detonation.

2. Enhanced Performance: These springs provide better response and control, allowing for improved engine performance and power output.

3. Durability: The R780R-8 springs are made from high-quality materials and are designed for long-lasting performance.

1. Cost: These aftermarket springs are more expensive than the stock springs.

2. Installation Complexity: Installing these springs may require specialized tools and expertise, adding to the overall cost and time investment.

1. Reduced Valve Bounce: The dual-spring design of the R780R springs helps to reduce valve bounce, which can lead to improved engine efficiency and performance.

2. Suitability for High-Performance Applications: These springs are suitable for engines with high power output and heavy modifications, ensuring reliable valve control under demanding conditions.

3. Improved Engine Response: The R780R springs provide improved engine response, allowing for quicker acceleration and smoother power delivery.

1. Cost: Similar to the R780R-8 springs, the R780R springs are more expensive than stock springs.

2. Installation Complexity: Installing these springs may also require specialized tools and expertise.

Both the ProComp R780R-8 and R780R double valve springs offer significant advantages over stock springs for 1957-1977 Chevrolet 283-400 engines, particularly in terms of increased load capacity, enhanced performance, and durability. However, these advantages come with a higher cost and the need for specialized installation.

Ultimately, the decision between the two options depends on your specific engine requirements and budget. If your engine is heavily modified or producing high power output, the R780R double valve springs may be the better choice due to their ability to reduce valve bounce and improve engine response. On the other hand, if you're primarily looking for increased load capacity and improved performance, the R780R-8 springs may be a more cost-effective solution.

Based on the analysis, if you have a heavily modified engine with high power output or if you plan to make such modifications in the future, we would recommend investing in the ProComp R780R double valve springs for the best results. However, if your engine modifications are more modest and you're looking to improve performance and load capacity without the added cost and complexity of the R780R double valve springs, the R780R-8 springs may be a suitable alternative.

Details:

New in box by Speed Pro. Dual springs for sbc.

part #: vs780r8 prices

• $55.00-$145.00

specifications voomvalve:

• for models: Vs-780r
• for makes: Chevrolet
• for years: 1957-1977
• brand: Speed Pro
• mpn: Vs-780r-8
• part type: Valve Spring

offer voomvalve:

• best offers: True
• availability: In Stock
• options: Ship-to-home
• sold: 0
• started: October 9, 2025
• quantity: 1

shipping voomvalve:

• transit: 6-11 Days
• type: Calculated
• service: USPS Priority Mail
• carrier: USPS
• class: Expedited
• cost: $12.25

seller voomvalve:

• rating: 100.0%
• # reviews: 11
• city: Modesto, California

returns voomvalve:

• policy: No Returns

payments voomvalve:

• wallet: Apple-pay
• credit card: Discover
• other

general voomvalve:

• condition: New
• Engines Engine Parts > Valvetrain Components > Valves

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