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The Nissan RB26DETT engine is renowned for its performance and tuning potential, particularly among enthusiasts of the Nissan Skyline. One of the most common modifications made to this engine is porting the cylinder head. This article explores how much horsepower (HP) a ported RB26DETT head can add, supported by real-world dyno results.
Understanding the RB26DETT Engine
The RB26DETT is a 2.6-liter inline-six engine featuring twin turbochargers. It is known for its robust construction and high-revving capabilities. The engine’s design allows for significant tuning potential, making it a favorite among car enthusiasts and tuners.
What is Porting?
Porting refers to the process of modifying the intake and exhaust ports of the cylinder head to improve airflow. This can lead to better combustion efficiency and increased power output. The process typically involves:
- Removing material to enlarge the ports
- Polishing the surfaces for smoother airflow
- Reshaping the ports to optimize flow dynamics
Real-World Dyno Results
To assess the impact of a ported RB26DETT head on horsepower, several dyno tests were conducted. The following results illustrate the improvements seen with a ported head compared to a stock configuration.
Stock RB26DETT Dyno Results
A stock RB26DETT engine typically produces around 276 HP at the crank. This figure is based on the factory specifications and represents the baseline performance of the engine.
Ported RB26DETT Dyno Results
After porting the cylinder head, the same engine was tested on the dyno. The results showed a significant increase in horsepower:
- Peak horsepower: 320 HP at the crank
- Increase in horsepower: 44 HP
Factors Influencing Power Gains
Several factors can influence the power gains from porting a cylinder head:
- Quality of the porting job
- Supporting modifications (e.g., upgraded turbochargers, fuel injectors)
- Tuning and engine management
Conclusion
Porting the cylinder head of a Nissan RB26DETT can yield substantial power gains. The real-world dyno results indicate an increase of approximately 44 HP, bringing the total to around 320 HP. For enthusiasts looking to maximize their engine’s performance, porting is a viable modification that can enhance both power and drivability.