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The 13B rotary engine, known for its lightweight and compact design, has gained a loyal following among car enthusiasts. One of the most significant upgrades for this engine is the addition of a turbocharger. In this article, we will compare two popular turbocharger options: the Holset HX35 and the Garrett GT3576R. Both of these turbochargers offer unique benefits, and understanding their differences can help you make an informed decision for your street or race application.
Overview of the 13B Rotary Engine
The 13B rotary engine, developed by Mazda, is a two-rotor engine that produces impressive power output relative to its size. Its design allows for high RPMs and a lightweight structure, making it a popular choice for both street and race applications. However, to maximize performance, many enthusiasts turn to turbocharging.
Understanding Turbochargers
A turbocharger is a device that forces more air into the engine, allowing it to burn more fuel and produce more power. Turbochargers are rated by their size, which is typically measured in terms of their compressor and turbine housing dimensions. Selecting the right turbocharger involves understanding your vehicle’s intended use, whether it be street driving or racing.
Holset HX35 Turbocharger
The Holset HX35 is a well-known turbocharger in the automotive community, particularly among rotary engine enthusiasts. It is designed for high efficiency and reliability, making it a great choice for both street and race applications.
Specifications
- Compressor Wheel Size: 60mm
- Turbine Wheel Size: 76mm
- Max Boost Pressure: 40 psi
- Compressor A/R: 0.60
- Turbine A/R: 0.70
Advantages
- High efficiency at low RPMs
- Robust construction for durability
- Good spool time for street applications
- Affordable compared to other options
Disadvantages
- May not support extremely high horsepower builds
- Limited aftermarket support compared to other brands
Garrett GT3576R Turbocharger
The Garrett GT3576R is another popular choice for rotary engine enthusiasts. Known for its performance capabilities, this turbocharger is often favored in racing applications due to its ability to support high horsepower builds.
Specifications
- Compressor Wheel Size: 76mm
- Turbine Wheel Size: 64mm
- Max Boost Pressure: 30 psi
- Compressor A/R: 0.70
- Turbine A/R: 0.63
Advantages
- Excellent performance at high RPMs
- Supports high horsepower builds
- Widely available aftermarket parts
- Fast spool time for racing applications
Disadvantages
- Higher cost compared to the HX35
- Less efficient at low RPMs
Comparative Analysis
When comparing the Holset HX35 and Garrett GT3576R, several factors come into play, including performance, efficiency, and cost. Below is a summary of how these two turbochargers stack up against each other.
Performance
The Garrett GT3576R outperforms the Holset HX35 in high RPM scenarios, making it the preferred choice for racing applications. However, the HX35 offers better low-end performance, which can be advantageous for street driving.
Efficiency
In terms of efficiency, the Holset HX35 is known for its ability to maintain good performance at lower RPMs, while the Garrett GT3576R excels at higher RPMs but may struggle with efficiency at lower speeds.
Cost
Cost is often a deciding factor for many enthusiasts. The Holset HX35 is generally more affordable, making it a great entry-level option. In contrast, the Garrett GT3576R comes with a higher price tag but offers superior performance capabilities.
Conclusion
Choosing between the Holset HX35 and the Garrett GT3576R ultimately depends on your specific needs and goals. For those looking for a reliable, cost-effective option for street driving, the Holset HX35 is an excellent choice. However, if you are aiming for high performance and racing capabilities, the Garrett GT3576R may be the better investment. Consider your driving style, budget, and performance goals to make the best decision for your 13B rotary engine.