The debate between Angle Plug SBC Heads and Straight Plug SBC Heads has been ongoing for years. Both styles of heads have their own advantages and disadvantages, and the decision of which to use ultimately comes down to the application.
In this article, we will discuss the differences between the two and the advantages and disadvantages of each, as well as the best applications for each. We will also look at the performance and cost differences between the two.
By the end of this article, readers will have a better understanding of the differences between Angle Plug SBC Heads and Straight Plug SBC Heads and be able to make an informed decision when it comes to choosing the right head for their application.
Comparing Angle & Straight Plug Sbc Heads
The debate between Angle Plug SBC Heads and Straight Plug SBC Heads has been ongoing for many years. Both styles of heads offer advantages and disadvantages, and it can be difficult to decide which is the best choice for a given application.
This article will provide an overview of the differences between the two types of heads, as well as the advantages and disadvantages of each. We will also discuss the various factors to consider when making a decision between Angle Plug SBC Heads and Straight Plug SBC Heads. Finally, we will provide some tips for choosing the right type of head for your engine.
Advantages
Angle plug SBC heads have several advantages over straight plug heads. Firstly, the angle plugs make it easier to access the spark plugs, allowing for quick and easy maintenance. Secondly, the angle plug design prevents heat from transferring to the spark plugs, resulting in more consistent performance and a longer lifespan for the spark plugs.
Additionally, the angle plug design helps to reduce the risk of cross-threading when installing the spark plugs, making them easier to install and remove. Furthermore, the angled design of the spark plugs allows for more efficient combustion, resulting in more horsepower and torque.
Lastly, the angle plug design also helps to reduce the risk of detonation due to the increased cylinder pressure. All of these advantages make angle plug SBC heads the preferred choice for many engine builders.
Lower Cost
When it comes to cost, straight plug SBC heads tend to have a lower price tag than angle plug heads. This is mainly due to the fact that angle plug heads require more machining, resulting in a higher cost for the parts. Straight plug heads are simpler to produce and thus are less expensive.
Furthermore, straight plug heads are usually made from traditional cast iron, while angle plug heads are more commonly made from aluminum, which also adds to the cost. Ultimately, if you’re looking for a budget-friendly option, straight plug SBC heads are going to be the most cost-effective choice.
Easier Access
When it comes to easier access, angle plug SBC heads are the way to go. These heads have been designed with an angled plug to provide better access to the spark plug, giving technicians an easier time when it comes to maintenance and repairs. Furthermore, because of the angle, the spark plug wires are easier to attach and remove.
This makes it ideal for high rev engines, as technicians can work on them without having to take the entire engine apart. Additionally, the angled plug also allows for a quicker spark, which helps to reduce engine wear and tear. All in all, angle plug SBC heads are the better choice when it comes to easier access.
Improved Ignition
When discussing the difference between angle plug SBC heads and straight plug SBC heads, one factor that stands out is improved ignition. Angle plug heads are designed to provide the spark plug with a better, more direct path to the combustion chamber. This improved path is designed to provide a stronger spark, which can improve the combustion process.
The spark plugs in angle plug heads are also easier to access, which can make replacing them simpler and faster. Additionally, the improved ignition from angle plug heads can help increase engine efficiency and performance.
Better Spark Plug Grip
When it comes to spark plug grip, there are two main options for SBC heads: angle plugs and straight plugs. Angle plugs provide a better grip due to their slightly angled shape, allowing for an easier installation and improved contact with the spark plug wire. On the other hand, straight plugs are usually found in older engines that do not feature the same design as angle plugs.
For the best performance, it is recommended to use angle plugs for SBC heads. They offer greater grip, which ensures a reliable connection and improved spark plug performance. Additionally, angle plugs are more readily available than straight plugs, making them a more convenient and cost-effective option.
Disadvantages
One of the main disadvantages of angle plug SBC heads is that they are not as easy to work on as straight plug SBC heads. Additionally, angle plug SBC heads require a special gasket and the use of a universal intake manifold. This means that it is more difficult and expensive to install angle plug SBC heads.
Furthermore, the spark plugs on angle plug SBC heads are more difficult to reach, making it harder to change them. Finally, the spark plug wires on angle plug SBC heads tend to be shorter, making it harder to route them around the engine bay.
Poor Headgasket Sealing
When it comes to headgasket sealing, angle plug SBC heads are known to have poorer sealing than straight plug SBC heads. This is due to the angle plug heads being designed with a flat-milling pattern, which creates a less consistent seal than a straight plug head.
As a result, angle plug heads are more prone to headgasket failure, and can even lead to an engine failure if the headgasket is not replaced or maintained properly.
To ensure better engine performance and longevity, it is recommended to opt for the straight plug SBC head if you’re looking to replace your headgaskets. This is because they provide a more consistent, tight seal, which will ensure that your engine runs efficiently and lasts for a long time.
Firing Order Issues
When it comes to the firing order of an engine, the difference between angle plug and straight plug SBC heads is significant. Angle plug SBC heads have a different firing order than straight plug SBC heads. This is because the angle plug SBC heads have the spark plug located at a different angle than the straight plug SBC heads.
The firing order on an angle plug SBC head is 1-8-4-3-6-5-7- On the other hand, the firing order of a straight plug SBC head is 1-8-7-2-6-5-4- Because of the difference in firing order, it’s important to ensure that the correct head is used when building or repairing an engine.
Failing to do so can lead to engine misfires and other issues. Additionally, it’s important to use the correct size spark plug with the correct head, as mismatched spark plugs can also cause engine misfires.
Poor Intake Manifold Fit
Intake manifold fit is an important factor when considering different types of SBC heads. Angle plug SBC heads have a raised intake port area that can cause a poor fit with some intake manifolds.
Straight plug SBC heads, however, have a flatter intake port area that provides a better fit with many intake manifolds. Unfortunately, this improved fit may come at the expense of lower flow potential, as the raised intake port of the angle plug heads may provide superior airflow.
In addition, straight plug heads can be more difficult to install due to the shorter reach from the cylinder head surface. Therefore, it’s important to research the intake manifold fit of both types of SBC heads before making your decision.
Spark Blowout Potential
The spark blowout potential of angle plug SBC heads is greater than that of straight plug SBC heads. This is because the spark plug of an angle plug SBC head is located at a greater angle in relation to the cylinder wall. This angle creates a greater surface area on the plug, allowing more spark energy to be released.
As a result, the spark is more likely to blow out of the cylinder under increased pressure. Additionally, the angle plug SBC head is located further away from the cylinder wall, which reduces the amount of heat transferred to the plug. This decreased heat transfer further increases the chance of a spark blowout.
Conclusion
Angle plug SBC heads and straight plug SBC heads are both popular options for small block Chevy engines. Angle plug heads offer improved intake and exhaust port flow, while straight plug heads are more affordable and easier to install.
Both types of heads have their own advantages and disadvantages, so it’s important to consider your specific needs when selecting the best option for your engine. Ultimately, the best choice will depend on your budget, engine requirements, and desired performance.
FAQ’s
1.How Do Angle Plug Sbc Heads Differ From Straight Plug Sbc Heads?
Ans: Angle plug SBC (small block Chevy) heads have spark plugs that are installed at an angle, usually at 15 or 20 degrees. Straight plug SBC heads have spark plugs that are installed in a straight line.
The angle plug heads are designed to improve combustion and provide a better seal between the plug and the cylinder head. The straight plug heads are typically more affordable and easier to service than the angle plug heads.
2.What Are The Performance Advantages Of Angle Plug Sbc Heads?
Ans: The performance advantages of angle plug SBC heads include improved combustion efficiency, improved access to spark plugs, higher compression ratios, and improved air/fuel distribution. The design of the angle plug allows for the use of larger valves which increases air/fuel flow and cylinder head airflow.
Additionally, the design of the angle plug eliminates the need for a separate spark plug wire connector, which further improves engine performance. Finally, angle plug heads reduce the amount of heat that is trapped in the cylinder head, allowing for an increase in power.
3.What Types Of Engines Are Best Suited For Angle Plug Sbc Heads?
Ans: Angle plug SBC (Small Block Chevy) heads are best suited for small block V8 engines. The most common engine type used with angle plug SBC heads is the 350- or 400-cubic inch displacement. High-performance engines, such as the LS1, LS2, and LS3 engines, are also commonly used. Finally, certain big block engines, such as the 454 and 502, are sometimes mated to angle plug SBC heads.
4.Are There Any Advantages To Using Straight Plug Sbc Heads?
Ans: Yes, there are advantages to using straight plug SBC heads. These heads have improved combustion chamber design, which helps to prevent detonation and increase performance. Additionally, these heads are lighter and more compact than conventional heads, so they can help reduce the overall weight of the engine. Finally, they are more cost effective than other types of heads, so they can help to reduce the overall cost of the engine build.
5.What Modifications Are Typically Needed When Using Angle Plug Sbc Heads?
Ans: Typical modifications for using angle plug SBC heads include shortening the pushrods, using the correct rocker arms, and using special spark plug wires. It is also important to modify the intake manifold to clear the spark plugs. Additionally, the valve covers may need to be modified to ensure the spark plugs fit correctly.
