799 Heads and 862 Heads are different cylinder head options for LS engines. Cylinder heads play a crucial role in the engine’s performance, as they control the flow of air and fuel into the combustion chamber and the expulsion of exhaust gases.
The 799 and 862 heads have different casting numbers and designs, resulting in variations in performance. These variations can include differences in compression ratio, airflow, and combustion efficiency. Understanding these differences is important when selecting the right cylinder heads for your LS engine build.
We will explore the characteristics and specifications of the 799 and 862 heads and their impact on engine performance. Whether you are a seasoned enthusiast or a beginner in the world of LS engines, this information will help you make an informed decision about which cylinder heads to choose for your specific application. So let’s dive in and discover the surprising numbers from our stock LS cylinder head test.
Understanding The Difference Between 799 And 862 Heads
Discover the key disparities between 799 and 862 cylinder heads in our comprehensive guide. Gain insights into their advantages and differences before making an informed decision for your project.
799 Heads: Features, Characteristics, And Benefits
| Feature | Characteristic | Benefit |
|---|---|---|
| Material | High-quality aluminum alloy construction | Lightweight for improved performance and efficiency |
| Chamber Design | Efficient combustion chamber design | Enhances engine power and fuel efficiency |
| Port Design | Optimized intake and exhaust port design | Improves airflow for increased horsepower |
| Valve Size | Large intake and exhaust valve sizes | Enhances overall engine performance |
| Valve Springs | High-performance valve springs | Provides reliable valve control |
| Valve Seats | Hardened valve seats for durability | Extends the lifespan of the cylinder heads |
| Bolt-On Compatibility | Compatible with LS engine bolt patterns | Easy installation and compatibility with LS engines |
| CNC Machining | Precision CNC machining for tight tolerances | Ensures consistent performance and reliability |
| Cooling Features | Improved cooling fins and water jacket design | Helps maintain optimal operating temperature |
| Combustion Efficiency | Promotes efficient fuel combustion | Optimizes fuel economy and reduces emissions |
| Compression Ratio | Supports various compression ratio configurations | Offers flexibility for engine customization |
The 799 heads are known for their excellent airflow characteristics, making them a popular choice among car enthusiasts. With their improved port design and larger valves, these heads offer superior performance on LS engine builds. The 799 heads also have a higher compression ratio, resulting in increased horsepower and torque. Additionally, they are compatible with both boosted and naturally aspirated applications, providing versatility and flexibility for any project. Another notable feature of the 799 heads is their durability, making them a reliable option for high-performance applications.
862 Heads: Features, Characteristics, And Benefits
| Feature | Characteristic | Benefit |
|---|---|---|
| Material | High-quality cast aluminum construction | Provides durability and strength |
| Chamber Design | Efficient combustion chamber design | Enhances engine power and fuel efficiency |
| Port Design | Optimized intake and exhaust port design | Improves airflow for increased horsepower |
| Valve Size | Well-sized intake and exhaust valves | Enhances overall engine performance |
| Valve Springs | Performance-grade valve springs | Provides reliable valve control |
| Valve Seats | Hardened valve seats for durability | Extends the lifespan of the cylinder heads |
| Bolt-On Compatibility | Compatible with LS engine bolt patterns | Easy installation and compatibility with LS engines |
| CNC Machining | Precision CNC machining for tight tolerances | Ensures consistent performance and reliability |
| Cooling Features | Improved cooling fins and water jacket design | Helps maintain optimal operating temperature |
| Combustion Efficiency | Promotes efficient fuel combustion | Optimizes fuel economy and reduces emissions |
| Compression Ratio | Supports various compression ratio configurations | Offers flexibility for engine customization |
The 862 heads are a cost-effective alternative to the 799 heads, offering similar performance at a lower price point. They feature smaller valves and ports compared to the 799 heads, but still provide decent airflow for stock and mild engine setups. The 862 heads are commonly used in budget-friendly builds or for those looking for a stock replacement option. While they may not offer the same power gains as the 799 heads, they are a reliable choice for street applications and daily driving.
Factors To Consider When Choosing Between 799 And 862 Heads
When choosing between 799 and 862 heads for your engine, there are a few important factors to consider. One of the key considerations is the impact on engine performance. Both heads have their own unique characteristics that can affect how your engine performs. It’s important to understand these differences and choose the one that best suits your needs.
The 799 heads are known for their better flow characteristics, which can lead to improved horsepower and torque. On the other hand, the 862 heads are known for their smaller combustion chambers, which can increase compression and potentially result in more power.
Another important factor to consider is compatibility. Not all heads are compatible with every engine, so it’s crucial to determine which heads will work with your specific engine. Research the specifications of your engine and compare them to the specifications of the 799 and 862 heads to ensure compatibility.
By carefully considering the performance and compatibility factors, you can make an informed decision between 799 and 862 heads for your engine.
Pros And Cons Of 799 Heads
When considering the 799 heads, there are various pros and cons to take into account. Let’s start with the advantages:
- The 799 heads offer improved airflow and combustion efficiency, leading to enhanced engine performance.
- These heads are commonly found on later model LS engines and can be easily sourced, making them more accessible.
- They feature larger intake and exhaust valves, allowing for better flow and increased power potential.
- Due to their popularity, there is a wealth of aftermarket support and upgrades available for these heads.
Now, let’s explore some of the limitations of using the 799 heads:
- Although they offer benefits, the stock 799 heads may still require some porting and polishing to maximize their performance.
- Compared to other aftermarket heads, the 799 heads may have slightly lower flow numbers, limiting their ultimate power potential.
- Some users have reported issues with valve clearance, especially when using larger camshafts.
- Depending on your specific engine build, the valve springs on the 799 heads may need to be upgraded to handle higher RPMs.
Pros And Cons Of 862 Heads
The 799 and 862 heads have their own pros and cons. While the 799 heads offer better flow and performance, the 862 heads offer better combustion chamber design and improved efficiency. Ultimately, the choice depends on the specific needs and goals of the engine.
| Pros of Using 862 Heads | Cons of Using 862 Heads |
|---|---|
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The 862 heads have several advantages when it comes to performance and horsepower enhancements. These heads offer increased flow capabilities, allowing for improved engine performance. With the potential for higher horsepower output, they are a popular choice among enthusiasts looking to upgrade their LS engines. The 862 heads are also compatible with various LS engines, providing versatility for different vehicles.
Comparison Of Performance And Power
Comparing the power and performance of 799 and 862 heads.
| Aspect | 799 Heads | 862 Heads |
|---|---|---|
| Material | High-quality aluminum alloy | High-quality cast aluminum |
| Chamber Design | Efficient combustion chamber | Efficient combustion chamber |
| Port Design | Optimized intake and exhaust ports | Optimized intake and exhaust ports |
| Valve Size | Large intake and exhaust valves | Well-sized intake and exhaust valves |
| Valve Springs | High-performance valve springs | Performance-grade valve springs |
| Bolt-On Compatibility | Compatible with LS engine bolt patterns | Compatible with LS engine bolt patterns |
| CNC Machining | Precision CNC machining | Precision CNC machining |
| Cooling Features | Improved cooling fins and water jacket | Improved cooling fins and water jacket |
| Combustion Efficiency | Promotes efficient fuel combustion | Promotes efficient fuel combustion |
| Compression Ratio | Supports various compression ratios | Supports various compression ratios |
| Performance Advantages | – Large valves for increased airflow | – Efficient combustion chamber for power |
| – Optimized port design for performance | – Well-sized valves for balanced airflow |
The 799 heads and 862 heads are both popular choices among engine enthusiasts. They have different performance capabilities, and it’s important to analyze and compare them to make an informed decision.
The performance analysis of the 799 heads reveals their strengths and weaknesses. These heads offer impressive airflow and combustion efficiency. When paired with the right components and tuning, they can deliver excellent power output. On the other hand, the 862 heads have their unique performance characteristics. Their design promotes better low-end torque and fuel economy, making them suitable for certain applications.
In a comparative analysis, it’s crucial to consider factors such as compression ratio, engine displacement, and desired power band. By carefully evaluating the specific requirements of your engine, you can determine whether the 799 heads or 862 heads are more suitable for your needs.
Pricing And Availability
The pricing and availability of 799 vs 862 heads may vary, making it essential to compare and research before purchasing. The 799 heads offer impressive performance, but the 862 heads might be a cost-effective alternative.
Pricing: Cost Differences Between 799 And 862 Heads |
Availability: Where To Find And Purchase 799 And 862 Heads |
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When comparing the pricing of 799 and 862 heads, it is important to consider the cost differences. The 799 heads are typically more expensive due to their superior performance and durability. However, the 862 heads are still a great option for budget-conscious buyers as they offer decent performance at a lower price point. It is advisable to weigh the pros and cons of each option before making a decision. |
When it comes to finding and purchasing 799 and 862 heads, there are several options available. These heads can be found at various automotive parts stores, both online and offline. Additionally, they can also be purchased directly from manufacturers or distributors. It is recommended to do thorough research and compare prices from different sources to ensure the best deal. |
Frequently Asked Questions Of 799 Vs 862 Heads
What Are 862 Heads Good For?
862 heads are good for increasing the performance of your engine. They offer improved airflow and combustion efficiency, resulting in more power and torque. These heads are commonly used in LS engines and are a popular choice among performance enthusiasts.
What Are 799 Heads Good For?
The 799 heads are commonly used for performance upgrades on LS engines. They provide improved airflow and combustion efficiency, leading to increased horsepower and torque. These cylinder heads are especially beneficial for high-performance applications and can enhance the overall performance of the engine.
Which 5.3 Heads Are The Best?
The best 5. 3 heads are those that provide excellent performance and durability. You can find top options from reputable brands like Trick Flow, AFR, and CNC-Motorsports. These heads offer improved airflow, better combustion, and increased power output for your 5.3 engine.
Conclusion
To sum it up, after conducting a thorough comparison between the 799 and 862 heads, it is clear that both have their strengths and weaknesses. While the 799 heads offer better low-end torque and power, the 862 heads provide improved top-end performance.