Ever wondered what makes an engine roar with power? A big part of that rumble comes from the cylinder heads! For anyone working with a Small Block Chevy, these heads are super important. They control how air and fuel get into the engine and how exhaust gets out. But picking the right ones can feel like a puzzle.
There are so many different types of Small Block Chevy heads out there, each with its own promises. It’s easy to get confused about which ones will give you the best performance for your money. You want heads that make your engine run strong and smooth, not ones that cause headaches or cost too much.
This post is here to help! We’ll break down what you need to know about Small Block Chevy heads. By the end, you’ll understand the basics and feel more confident choosing the perfect set for your project. Let’s dive in and unlock the secrets to better engine power!
Top Small Block Chevy Heads Recommendations
- Perfect Fit: Replaces the original cylinder head assembly to resolve failure and damage issues. As a cylinder head for small block Chevrolet engines, it fits the following models: SBC 327/350/383 Corvette, Camaro, Z06. You will experience unprecedented smoothness in engine operation.
- Precise Manufacturing: Utilizes CNC precision machining for the combustion chamber, intake, and exhaust passages. Compared to standard casting, this cylinder head provides smoother airflow and high precision with excellent sealing. Ensures that all components (such as valves, threaded holes, etc.) are correctly positioned, sized, and angled, avoiding issues such as improper valve heights. Passed sealing tests to ensure correct installation and operation.
- Long Service Life: The cylinder head assembly is crafted from premium materials to extend its lifespan. Made with industrial-grade aluminum alloy, it offers excellent impact resistance, wear resistance, and rapid heat dissipation to prevent overheating. We also include manganese bronze valve guides and hardened valve seats to maintain engine performance stability. Upgrade from disappointing old cylinder heads with our reliable option.
- Fully Assembled: The cylinder head assembly comes fully assembled with all necessary components, including valve spring seats, inner springs, outer springs, valve locks, valve seals, valve seats, intake valves, and exhaust valves. This reduces the likelihood of installation errors and ensures ease of use. It is carefully packaged and ready to be delivered to you. Please keep the installation environment clean and have a professional perform the installation.
- Efficient Solution for Common Issues: If your vehicle experiences abnormal vibrations, severe oil leaks, aging or deformation, or excessive spark plug oil deposits, consider replacing it with this high-quality engine cylinder head. It will enhance horsepower, improve fuel efficiency, and reduce emissions.
- Interchange Part Number: 129006601
- Replacement for Chevy Small Block 350/327/383 Corvette Camaro Z06 190cc 64cc
- Combustion Chamber Volume: 64 cc
- Intake Runner Volume: 190 cc
- Material: Aluminum
- Product type: auto part
- Package quantity: 1
- Made in united states
- Package dimensions: 24.1" (l) x 10.7" (w) x 8.6" (h)
- Small Block Chevy 350 w/Hydraulic Roller Cam
- Assembled Head
- 64cc Combustion Chamber
- 205cc Intake Runner
- Angle Plug
- Part Number: 129006601
- Material: Aluminum
- Intake Runner Volume (cc): 190 cc
- Replacement for Chevy SBC 350/327/383 Corvette Camaro Z06 190cc 64cc
- Combustion Chamber Volume (cc): 64 cc
- Vehicle Compatibility - Cylinder Head Compatible with SBC engines 302/327/350/383/400 small block chevy engines up to 1986. Not compatible with Vortec style intake manifolds
- High-Performance - Featuring a 200cc intake runner, this cylinder head enhances power while retaining stock compression for 1970 and earlier models
- Optimized Combustion - With a 68cc combustion chamber and square intake and exhaust ports, this design ensures efficient airflow and optimal performance
- Lightweight Design - Lighter than iron heads, each head weighs just 10.33kg. Featuring a 3-angle valve seat and a straight spark plug angle, this design ensures superior performance and efficiency
- Product Specifics - Intake Valve Diameter: 2.020inch | Exhaust Valve Diameter: 1.600inch | Intake Port Volume: 200cc | Combustion Chamber Volume: 68cc | Intake Port: Square | Exhaust Port: Square | Spark Plug Angle : Straight
- 【Fitment】Compatible with Chevy SBC 302, 327, 350, 383 and 400 small-block engines manufactured in 1986.
- 【Specifications】Intake Valve Diameter: 2.020" | Exhaust Valve Diameter: 1.600" | Intake Port Volume: 200cc | Combustion Chamber Volume: 68cc | Intake Port: Square | Exhaust Port: Square | Spark Plug Angle : Straight | 23 Degree Intake & Exhaust Valve Angles | 3-Angle Valve Seat
- 【High Quality】High grade aluminum, bronze valve guides, hardened seats, advance port design for greater air flow. Lighter than Iron Heads, each Head weighs 10.33 kg. Dual pattern valve covers will accept either center bolt or perimeter bolt valve covers.
- 【High Performance】This head is 200cc intake runner with a 68cc combustion chamber, 68cc combustion chambers improve performance and retains stock compression on 1970 and earlier. This head has a thick deck design so they can be used on nitrous, turbocharged and supercharged applications.
- 【Note】This cylinder head does not have 400 stem holes. May require drilling if necessary. With pre-drilled accessory bolt holes. Valves, springs, retainers, hardware not included.
- Compatible with Chevy Small Block 283, 302, 305, 327, 350, 383, and 400 V8 engines up to 1986.
- Features an angle spark plug style.
- The intake valve diameter measures 2.020 inches, and the exhaust valve diameter is 1.600 inches.
- The combustion chamber volume is 64cc, while the intake runner volume is 205cc.
- Constructed from high-grade aluminum with bronze valve guides and ductile iron valve seats for durability.
Your Guide to Small Block Chevy Heads: Unleash the Power!
Thinking about upgrading your Small Block Chevy engine? New cylinder heads can make a huge difference! They help your engine breathe better and make more power. This guide will help you pick the right ones.
What are Small Block Chevy Heads?
Small Block Chevy (SBC) heads sit on top of your engine’s cylinders. They have valves that let air and fuel in and exhaust gases out. Upgrading them is a popular way to boost performance.
Key Features to Look For
When you shop for SBC heads, keep these important things in mind.
1. Port Size and Shape
- Intake and Exhaust Ports: These are the openings where air/fuel goes in and exhaust goes out. Bigger ports usually mean more airflow. The shape matters too. A good shape helps air move smoothly.
- Port Velocity: Sometimes, smaller ports can be better for certain engines. They keep the air moving fast. This is good for low-end torque.
2. Combustion Chamber Size
- CCs (Cubic Centimeters): This is how much space is in the chamber where the spark plug ignites the fuel. Smaller chambers make the engine more powerful. They also increase compression. Bigger chambers can lower compression and are sometimes better for street cars.
3. Valve Size
- Intake and Exhaust Valves: Larger valves let more air and fuel in and exhaust out. Bigger is often better for high-performance engines. But they need enough space to fit.
4. Bolt Pattern and Head Bolt Holes
- Compatibility: Make sure the heads fit your engine block. Most SBC heads have standard bolt patterns.
- Head Bolt Holes: Check if they are standard or if they are “siamese” (joined).
5. Material
- Aluminum: These heads are lighter. They also cool better, which can prevent overheating. Aluminum heads often offer better performance.
- Cast Iron: These are heavier but usually cheaper. They are very strong and durable. Cast iron heads are a good choice for budget builds.
Important Materials
The material your heads are made from affects their performance and cost.
- Aluminum: This is the most popular choice for performance. It’s lighter than iron. This helps your car accelerate faster. Aluminum also dissipates heat well. This can keep your engine running cooler.
- Cast Iron: This is the original material for many SBC heads. It is very strong. It’s also more affordable. Cast iron heads are a solid choice for many applications.
Factors That Improve or Reduce Quality
What makes some heads better than others?
Improving Quality:
- Good Design: Heads designed by experienced engineers often perform better.
- Precision Machining: Accurate machining ensures everything fits perfectly. This leads to better sealing and performance.
- High-Quality Materials: Using good aluminum or iron makes the heads last longer.
- Good Airflow: Heads that are designed for excellent airflow will make your engine stronger.
Reducing Quality:
- Poor Casting: Rough surfaces inside the ports can slow down airflow.
- Inaccurate Machining: This can cause leaks. It can also make installation difficult.
- Cheap Materials: Using lower-quality materials can make the heads less durable.
User Experience and Use Cases
Who uses these heads and why?
Street Performance:
- For everyday driving with a bit more pep.
- Aluminum heads with medium port sizes are often a good choice.
- They improve acceleration and passing power.
Drag Racing:
- These engines need maximum power.
- Large port aluminum heads are common.
- They help the engine make power at high RPMs.
Circle Track Racing:
- Durability and consistent performance are key.
- Cast iron or strong aluminum heads are used.
- They need to handle tough conditions.
Restoration Projects:
- Sometimes, original cast iron heads are preferred for authenticity.
- Rebuilt original heads can be a good option.
Frequently Asked Questions (FAQ)
Q: What are the main Key Features of Small Block Chevy Heads?
A: The main Key Features include port size and shape, combustion chamber size, valve size, and bolt pattern. These all affect how well your engine runs.
Q: Is aluminum or cast iron better for my Small Block Chevy heads?
A: Aluminum heads are lighter and cool better, often leading to better performance. Cast iron heads are heavier but more affordable and very durable.
Q: How does the combustion chamber size affect my engine?
A: A smaller combustion chamber increases compression and power. A larger chamber lowers compression and can be smoother for street use.
Q: What does “port velocity” mean?
A: Port velocity refers to how fast the air and fuel mixture moves through the intake ports. Higher velocity can be good for low-end power.
Q: Will bigger valves always make my engine more powerful?
A: Bigger valves can help, but they need to fit properly within the head and not hit other parts of the engine. The overall design of the head is also important.
Q: How important is the material of the cylinder heads?
A: The material is very important. Aluminum is lighter and dissipates heat better. Cast iron is stronger and more budget-friendly.
Q: What are some signs of low-quality cylinder heads?
A: Signs of low quality include rough surfaces inside the ports and inaccurate machining, which can lead to leaks.
Q: Can I use any Small Block Chevy heads on my engine?
A: You need to make sure the bolt pattern and bolt holes match your engine block. Most SBC heads will fit, but it’s good to check.
Q: What kind of heads are good for street performance?
A: Aluminum heads with medium-sized ports are usually a great choice for street performance. They offer a good balance of power and drivability.
Q: Are there different types of heads for different uses?
A: Yes, heads are designed for different uses like street driving, drag racing, or circle track racing. Each type has features that help it perform best in its intended application.