Best 350 Small Block Heads: Guide & Reviews

Introduction

The 350 small block engine is a legendary powerplant, known for its versatility and performance potential. Upgrading the cylinder heads is one of the most effective ways to unlock more horsepower and torque from your 350. But with so many options on the market, choosing the right heads can be daunting. In this comprehensive guide, we'll cover everything you need to know about 350 small block heads, including key features, performance considerations, and our top recommendations. Whether you're building a street machine, a race car, or a reliable daily driver, this guide will help you select the perfect heads for your 350 small block.

Understanding 350 Small Block Heads

What are Cylinder Heads?

Cylinder heads are a crucial component of your engine, sitting atop the engine block and sealing the cylinders. They house the intake and exhaust valves, combustion chambers, and spark plugs. The design of the cylinder heads significantly impacts airflow, combustion efficiency, and overall engine performance.

Why Upgrade Your Cylinder Heads?

Upgrading your cylinder heads can offer several benefits:

• Increased Horsepower and Torque: High-performance heads improve airflow into and out of the engine, allowing for better combustion and more power.
• Improved Fuel Efficiency: Efficient combustion can lead to better fuel economy.
• Enhanced Throttle Response: Better airflow means quicker engine response to throttle inputs.
• Higher RPM Potential: Upgraded heads often allow the engine to rev higher and produce more power at higher RPMs.

Key Features to Consider

When selecting 350 small block heads, consider these factors:

• Material:
  • Cast Iron: Affordable and durable, suitable for street and mild performance applications.
  • Aluminum: Lighter and dissipate heat better than cast iron, ideal for high-performance engines.
• Intake Runner Volume:
  • Smaller Runners (160-180cc): Good for low-end torque and street applications.
  • Larger Runners (190cc+): Best for high-RPM power and racing.
• Combustion Chamber Size:
  • Smaller Chambers (58-64cc): Increase compression ratio, boosting power.
  • Larger Chambers (70cc+): Lower compression, suitable for forced induction or high-octane fuel.
• Valve Size: Larger valves allow for more airflow.
• Valve Material:
  • Stainless Steel: Durable and heat-resistant.
  • Titanium: Lightweight and strong, ideal for high-performance engines.
• Port Design: Efficient port design maximizes airflow.
• Valve Angle:
  • 23-degree: Stock SBC valve angle, widely available and compatible.
  • 18-degree or Less: Improved airflow, typically for high-performance applications.

Top 350 Small Block Heads on the Market

1. Edelbrock E-Street Cylinder Heads

Edelbrock is a renowned name in performance parts, and their E-Street cylinder heads are an excellent choice for street performance. These heads offer a balance of performance and affordability. — Why Asmongold Skipped 2 Streams Exploring The Reasons

• Material: Aluminum
• Intake Runner Volume: 170cc
• Combustion Chamber Size: 64cc
• Valve Size: 2.02" intake/1.60" exhaust

Pros:

• Improved airflow over stock heads
• Lightweight aluminum construction
• Good for street and mild performance applications

Cons:

• Not ideal for high-RPM racing

2. AFR 195cc Enforcer Cylinder Heads

Airflow Research (AFR) is known for producing high-quality cylinder heads with exceptional flow characteristics. The AFR 195cc Enforcer heads are a popular choice for performance enthusiasts.

• Material: Aluminum
• Intake Runner Volume: 195cc
• Combustion Chamber Size: 65cc
• Valve Size: 2.02" intake/1.60" exhaust

Pros:

• Excellent airflow for increased horsepower
• Durable aluminum construction
• Suitable for a wide range of applications

Cons:

• Higher price point compared to other options

3. ProMaxx Performance Cylinder Heads

ProMaxx offers a range of cylinder heads, including options for 350 small blocks. Their heads are designed for performance and durability.

• Material: Aluminum
• Intake Runner Volume: Varies by model
• Combustion Chamber Size: Varies by model
• Valve Size: Varies by model

Pros:

• Variety of options to suit different needs
• Durable construction
• Good value for the price

Cons:

• Performance can vary depending on the specific model

Installation Tips and Considerations

Professional Installation vs. DIY

Installing cylinder heads can be a complex task, and it's crucial to ensure it's done correctly to avoid engine damage. If you're not experienced with engine work, consider professional installation.

Required Tools and Materials

If you're tackling the installation yourself, you'll need:

• Socket set
• Torque wrench
• Gasket scraper
• New head gaskets
• Head bolts
• Coolant
• Engine oil

Step-by-Step Installation Guide (Overview)

1. Preparation: Disconnect the battery and drain the coolant and oil.
2. Removal: Remove the intake manifold, exhaust manifolds, valve covers, and rocker arms.
3. Head Removal: Unbolt and remove the old cylinder heads.
4. Cleaning: Clean the block surface thoroughly.
5. Gasket Installation: Place new head gaskets on the block.
6. Head Installation: Install the new cylinder heads and torque the bolts to the manufacturer's specifications.
7. Reassembly: Reinstall the rocker arms, valve covers, intake manifold, exhaust manifolds, and other components.
8. Fluid Fill: Fill the engine with coolant and oil.
9. Start-Up: Start the engine and check for leaks.

Real-World Examples and Case Studies

Case Study 1: Street Performance Build

John, a car enthusiast, wanted to upgrade his 1969 Camaro's 350 engine for better street performance. He chose Edelbrock E-Street cylinder heads, which provided a significant improvement in horsepower and torque without sacrificing drivability.

Case Study 2: High-RPM Racing Engine

For a racing application, the AFR 195cc Enforcer heads are often chosen for their exceptional flow characteristics. These heads helped a race team achieve higher RPMs and more power on the track.

FAQ Section

What are the best cylinder heads for a 350 small block?

The best cylinder heads depend on your specific goals and budget. For street performance, Edelbrock E-Street heads are a great option. For high-performance applications, AFR 195cc Enforcer heads are a top choice. — Sunday Night Football: Tonight's Game & How To Watch

How much horsepower can I gain by upgrading my cylinder heads?

The horsepower gains vary depending on the heads and other modifications, but you can typically expect a 50-100 horsepower increase with upgraded cylinder heads. — Aberdeen, SD Zip Codes: Complete Guide

What is the difference between cast iron and aluminum cylinder heads?

Cast iron heads are more affordable and durable, while aluminum heads are lighter and dissipate heat better, making them ideal for high-performance applications.

How do I choose the right intake runner volume?

Smaller runners are better for low-end torque, while larger runners are ideal for high-RPM power. Consider your engine's intended use when selecting intake runner volume.

What is the ideal combustion chamber size?

The ideal combustion chamber size depends on your desired compression ratio. Smaller chambers increase compression, while larger chambers lower it.

Conclusion

Upgrading your 350 small block heads is a significant step toward improving engine performance. By understanding the key features and considering your specific needs, you can choose the perfect heads for your build. Whether you opt for the affordable Edelbrock E-Street heads or the high-performance AFR 195cc Enforcer heads, the right cylinder heads can unlock the full potential of your 350 small block.