1. What is Twin Turbo Size?

Twin turbo size refers to the optimal sizing of two smaller turbos that together provide similar performance to a single larger turbo. The twin configuration often improves throttle response and reduces turbo lag.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• Single Size — The size of a single turbo (in mm)
• Twin Size — The recommended size for each of the twin turbos (in mm)

Explanation: This calculation provides a starting point for selecting twin turbos that together will provide similar airflow capacity to the single turbo being replaced.

3. Importance of Proper Turbo Sizing

Details: Correct turbo sizing is crucial for achieving desired performance characteristics. Undersized turbos may not provide enough boost, while oversized turbos can cause excessive lag.

4. Using the Calculator

Tips: Enter the trim size of your current single turbo in millimeters. The calculator will output the recommended size for each turbo in a twin configuration.

5. Frequently Asked Questions (FAQ)

Q1: Is this calculation exact for all applications?
A: No, this is a general guideline. Actual sizing may vary based on specific engine characteristics and performance goals.

Q2: What about turbo response characteristics?
A: Twin turbos typically provide better response than a single turbo of equivalent total size, but exact behavior depends on many factors.

Q3: Should I consider other factors beyond size?
A: Yes, turbo selection should also consider A/R ratios, compressor maps, and turbine housing options for optimal performance.

Q4: How does this apply to sequential turbo systems?
A: Sequential systems may use different sizing strategies where the primary and secondary turbos are not identical.

Q5: What about turbo efficiency islands?
A: The calculator provides size only. Actual performance depends on operating within the turbos' efficiency ranges.