The 906 and 062 Vortec heads are two popular cylinder head options used in small-block Chevy engines. However, 062 has slightly larger valves than 906 Vortec Heads.
While 906 and 062 Vortec Heads share some similarities, there are also some notable differences.
Here is a quick comparison chart highlighting the significant specifications of 906 and 062 Vortec Heads.
Quick Comparison Table
|Specifications||906 Vortec Head||062 Vortec Head|
|Performance||Low Power Potentiality||High Power Potentiality|
|Compatibility||Compatible with specific engines||Compatible with all engines|
|Valves||1.94-inch intake and 1.50-inch exhaust valves||1.94-inch intake and 1.60-inch exhaust valves|
|Application||Mild Street Build||High Performance Strip|
Key Differences Between 906 And 062 Vortec Heads
The above comparison chart gave you a brief idea of the specifications of 906 and 062 Vortec Heads. It’s time to identify the critical features of the two products.
General Motors introduced the 906 and 062 Vortec heads in the mid-1990s, and both are based on the same basic design.
Both heads feature a small combustion chamber, which helps to increase compression and improve performance.
They also feature improved airflow over earlier small block Chevy heads, thanks to redesigned intake and exhaust ports.
The valve size is a notable difference between the 906 and 062 Vortec heads.
The 906 heads have 1.94-inch intake valves and 1.50-inch exhaust valves, while the 062 heads have slightly larger 1.94-inch intake valves and 1.60-inch exhaust valves.
This difference in valve size can affect the engine’s overall performance, as we will discuss later in this article.
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When it comes to performance, the 906 and 062 Vortec heads are both capable of delivering significant power gains over stock small block Chevy heads.
However, there are some differences in their performance capabilities.
The 062 Vortec heads are generally considered to be the better performer.
This is mainly due to the larger exhaust valves, which allow for improved exhaust flow and better scavenging.
The larger valves also allow for more aggressive cam profiles, which can further improve performance.
Additionally, the 062 heads were introduced later than the 906 heads and benefitted from minor design improvements, such as improved coolant flow.
That being said, the 906 Vortec heads are still an excellent option for those looking to improve the performance of their small-block Chevy engine.
While they may offer less power potential than the 062 heads, they can still deliver significant gains over stock heads.
However, smaller exhaust valves can be a limiting factor, particularly when running high-lift camshafts.
Regarding compatibility, the 906 and 062 Vortec heads are generally interchangeable with other small-block Chevy heads. However, there are a few things to remember when swapping between these heads.
Firstly, the 062 heads require a different intake manifold than the 906 heads. This is due to the larger intake port design of the 062 heads.
If swapping from 906 heads to 062 heads, you must also exchange to a compatible intake manifold.
Secondly, the larger exhaust valves on the 062 heads may require some modifications to the exhaust system to prevent interference.
This is particularly true when using headers, as some header designs may differ from larger valves.
Finally, it is essential to note that both the 906 and 062 Vortec heads require different rocker arms than earlier small-block Chevy heads.
This is due to the various valve angles and valve stem heights used in the Vortec heads. If you swap Vortec heads from earlier heads, you must change to compatible rocker arms.
Another factor to consider when choosing between the 906 and 062 Vortec heads is the specific application for which they will be used.
While both heads can deliver significant power gains, their ideal applications may differ.
For example, the 062 heads may be better for a high-performance street or strip application where maximum power output is desired.
The larger exhaust valves and improved airflow can support high-horsepower builds.
On the other hand, the 906 heads may be a better choice for a more mild street build or a truck application, where low-end torque and drivability are essential.
The smaller exhaust valves may not be a limiting factor in these types of applications, and the smaller combustion chamber can help to increase low-end power.
Cost is an essential factor to consider when choosing between the 906 and 062 Vortec heads.
Generally speaking, the 062 heads are slightly more expensive than the 906 heads.
This is partly due to their larger exhaust valves, which require more machining during production.
Additionally, the 062 heads are generally considered to be the more desirable of the two, which can drive up their price in the aftermarket.
Which Vortec Head Is Perfect For You?
062 Vortec Heads lead the race against 906 due to their exceptional power potentiality, better compatibility, and excellent durability.
Moreover, 062 heads make a better choice for a high-performance street or strip application where maximum power output is desired.
Price is the only drawback of 062 Vortec Heads. However, the premium quality and superior performance justify the high price range of the product.
Overall, 062 heads tick all the boxes of the best cylinder head for your car’s engine.
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Frequently Asked Questions (FAQ)
062 has slightly larger valves and provides better power potential than 906 Vortec Heads.
Larger Pot Heads draw the difference in Vortec heads products.
GM L-31, GMPP Fast Burn, 906 Vortec, 062 Vortec, and Dart IE are renowned products from Vortec Heads.
Vortec heads have a maximum valve lift of 470-480”.
Vortec heads are only compatible with earlier-generational blocks.
062 Vortec Heads is the winner in this comparison of 902 and 062 Vortec heads.
The combination of exceptional performance, larger valves, and better compatibility makes 062 Vortec heads.
Therefore, if you are searching for the best cylinder head options for your engine, then 062 Vortec Head is a perfect choice.