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The Mazda Miata is a beloved platform for car enthusiasts, especially when it comes to performance upgrades. One of the most popular modifications is the addition of a turbo kit. In this article, we will compare two well-known turbocharger options for the Miata: the Garrett GT28RS and the BorgWarner EFR 6758. Each of these turbochargers has its unique features, benefits, and drawbacks. Understanding these differences can help you make an informed decision for your Miata turbo kit.
Overview of the Turbochargers
Both the Garrett GT28RS and the BorgWarner EFR 6758 are popular choices among Miata enthusiasts. They offer different performance characteristics and fitment options that can affect your vehicle’s overall performance. Let’s take a closer look at each turbocharger.
Garrett GT28RS
The Garrett GT28RS, also known as the GT28R, is a well-established turbocharger that has been used in various applications. It is known for its quick spool time and high efficiency. Here are some key features:
- Compressor Wheel Size: 60mm
- Turbo Type: Journal Bearing
- Max Boost Pressure: 20 psi
- Power Range: 240-300whp
One of the main advantages of the GT28RS is its responsiveness. It spools quickly, allowing for better throttle response and driving enjoyment. This makes it an excellent choice for street and track use.
BorgWarner EFR 6758
The BorgWarner EFR 6758 is a newer option that has gained popularity among performance enthusiasts. It features advanced technology and is designed for high efficiency and performance. Here are some notable features:
- Compressor Wheel Size: 58mm
- Turbo Type: Ball Bearing
- Max Boost Pressure: 30 psi
- Power Range: 300-400whp
The EFR 6758 is known for its superior efficiency and higher power potential compared to the GT28RS. The ball bearing design allows for quicker spool times and better overall performance. It also includes integrated features such as a boost control solenoid and an anti-surge design, which can enhance reliability and drivability.
Performance Comparison
When comparing the performance of the Garrett GT28RS and the BorgWarner EFR 6758, several factors come into play, including spool time, power output, and overall drivability.
Spool Time
Spool time is crucial for turbocharged vehicles as it determines how quickly the turbocharger can provide boost. The GT28RS is known for its quick spool, making it suitable for low-end power and responsiveness. In contrast, the EFR 6758, while also responsive, may have a slightly longer spool time due to its larger compressor wheel and higher power potential.
Power Output
In terms of power output, the EFR 6758 has a clear advantage. With a maximum power range of 300-400whp, it can produce significantly more power than the GT28RS, which typically maxes out at 300whp. This makes the EFR 6758 a better choice for those looking to push their Miata to higher performance levels.
Drivability
Drivability is an essential consideration for daily drivers. The GT28RS offers excellent drivability with its quick spool and responsive nature, making it a great option for street use. The EFR 6758, while also offering good drivability, may require more tuning to achieve optimal performance. However, its efficiency can lead to better fuel economy under certain driving conditions.
Installation Considerations
When choosing between the Garrett GT28RS and the BorgWarner EFR 6758, installation considerations are essential. Each turbocharger may require different supporting modifications and fitment adjustments.
Garrett GT28RS Installation
The GT28RS is relatively straightforward to install, especially for those with prior experience in turbo installations. Common supporting modifications include:
- Upgraded fuel injectors
- Aftermarket fuel pump
- Upgraded intercooler
- ECU tuning
These modifications ensure that the Miata can handle the increased power and maintain reliability.
BorgWarner EFR 6758 Installation
The EFR 6758 installation may require more extensive modifications due to its advanced design and higher power potential. Supporting modifications may include:
- High-flow fuel injectors
- High-performance fuel pump
- Upgraded intercooler with larger piping
- ECU tuning with specialized software
Furthermore, the EFR 6758 may require custom fabrication for the exhaust manifold and downpipe, depending on the specific Miata model.
Cost Comparison
Cost is always a factor when considering performance upgrades. The Garrett GT28RS generally comes at a lower price point compared to the BorgWarner EFR 6758. However, the costs can vary based on the specific kit and additional modifications required.
Garrett GT28RS Pricing
The price for the Garrett GT28RS turbocharger typically ranges from $800 to $1200, depending on the source and any included accessories. Installation costs and supporting modifications should also be factored in.
BorgWarner EFR 6758 Pricing
The BorgWarner EFR 6758 usually has a higher price tag, ranging from $1200 to $1800. This price reflects its advanced technology and higher performance potential. As with the GT28RS, installation and supporting modifications will add to the overall cost.
Conclusion
Choosing between the Garrett GT28RS and the BorgWarner EFR 6758 ultimately depends on your performance goals and budget. The GT28RS is an excellent choice for those seeking a responsive and reliable turbocharger for street use, while the EFR 6758 offers higher power potential and advanced technology for performance enthusiasts. Consider your specific needs and consult with professionals to make the best decision for your Miata turbo kit.