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The A45 turbo upgrade is a critical consideration for enthusiasts looking to enhance their vehicle’s performance. Among the most popular options are the 19T and 21T turbo upgrades, each offering distinct advantages and performance gains. This article delves into a detailed size comparison between the two, focusing on how they can lead to more than 50 horsepower gains.
Understanding Turbocharger Sizes
Turbochargers are measured by their compressor wheel size, which directly influences their performance characteristics. The 19T and 21T designations refer to the size of the turbine and compressor wheels. Understanding these sizes is essential for making an informed decision regarding upgrades.
19T Turbo Upgrade
The 19T turbocharger is a popular choice among A45 owners due to its balance of performance and drivability. It offers a significant power increase while maintaining reasonable spool times and response.
Performance Characteristics
With the 19T upgrade, drivers can expect:
- Power Gains: Typically around 50-60 horsepower increase.
- Boost Threshold: Spools quicker than larger turbos, providing better low-end torque.
- Daily Drivability: Retains good drivability for everyday use.
21T Turbo Upgrade
The 21T turbocharger is designed for those seeking maximum performance. It provides a more substantial power increase compared to the 19T but may come with trade-offs in terms of spool time and drivability.
Performance Characteristics
Upgrading to a 21T turbocharger offers:
- Power Gains: Can achieve 70-80 horsepower increase, depending on supporting modifications.
- Boost Threshold: Slightly slower spool time, which may affect low-end power delivery.
- Performance Focus: Ideal for track use or high-performance applications.
Comparative Analysis: 19T vs 21T
When comparing the 19T and 21T turbo upgrades, several factors must be considered to determine which is best suited for your needs.
Power Output
The 21T turbocharger offers higher power output, making it an attractive option for those seeking maximum performance. However, the 19T provides a more balanced approach, suitable for daily driving.
Spool Time
Spool time is a critical factor in turbo performance. The 19T turbo spools faster, providing better low-end torque, while the 21T may take longer to reach peak boost.
Drivability
For everyday driving, the 19T turbo is often preferred due to its smooth power delivery. The 21T, while powerful, may require more attention to throttle management.
Supporting Modifications
Both turbo upgrades benefit from supporting modifications to maximize performance gains. Key modifications include:
- Upgraded intercooler for improved cooling efficiency.
- High-flow fuel injectors to support increased fuel demand.
- Performance exhaust system for better airflow.
- Tuning to optimize engine performance for the new turbo.
Conclusion
Choosing between the 19T and 21T turbo upgrades ultimately depends on your performance goals and driving preferences. The 19T offers a great balance for daily drivers, while the 21T caters to those seeking maximum horsepower and performance. Consider your specific needs and supporting modifications to make the best choice for your A45.