Choosing the Right Size Turbo for Your V8 Ls Swap: a Guide to Achieving 600+ Hp

by

When it comes to boosting the performance of your V8 LS swap, selecting the right size turbo is crucial for achieving your horsepower goals. A properly sized turbo can significantly enhance your engine’s performance, allowing you to reach and even exceed 600 horsepower. This guide will help you navigate the factors to consider when choosing the right turbo for your LS swap.

Understanding Turbo Sizing

Turbo sizing is essential because it affects how quickly the turbo can spool and how much power it can produce. The size of the turbocharger is typically determined by its compressor and turbine housing dimensions. A turbo that is too small may spool quickly but won’t provide the desired power, while a turbo that is too large may take longer to spool and can lead to lag.

Factors to Consider When Choosing a Turbo

  • Engine Displacement: The size of your LS engine (e.g., 5.3L, 6.0L, 6.2L) will influence the turbo size you need.
  • Power Goals: If your goal is to achieve over 600 hp, you’ll need a turbo capable of supporting that power level.
  • Boost Pressure: The amount of boost you plan to run will also affect turbo sizing; more boost generally requires a larger turbo.
  • Intended Use: Consider whether you are building a street car, a track car, or a dedicated drag car, as this will influence your turbo choice.
  • Turbocharger Type: Decide between twin-scroll or single turbos based on your performance needs and engine setup.

Calculating Turbo Size

To calculate the appropriate turbo size for your LS swap, you can use several methods, including using a turbo sizing calculator or following a general guideline based on horsepower and engine displacement. Here’s a basic approach:

  • Determine your engine’s horsepower goal.
  • Calculate the required air flow in cubic feet per minute (CFM).
  • Use the formula: CFM = (Horsepower x 0.5) / (Boost Pressure + 14.7) x 1.5.
  • Choose a turbo that can provide the calculated CFM at your desired boost level.

There are several turbo options available that are popular among LS swap enthusiasts. Here are a few that can help you achieve your 600+ hp goal:

  • Garrett GT3582R: A versatile turbo that provides a good balance of spool time and power output.
  • Precision 6266: Known for its efficiency and ability to support high horsepower levels.
  • BorgWarner S366: A great choice for those looking for high boost capabilities and durability.
  • Holset HX35: Popular in the diesel community, it can also be used effectively in LS swaps for impressive power.

Installation Considerations

Installing a turbo on your LS swap requires careful planning and execution. Here are some installation considerations to keep in mind:

  • Exhaust Manifold: Ensure you have a compatible manifold that can accommodate your chosen turbo.
  • Intercooler: An intercooler is essential for reducing intake temperatures and improving performance.
  • Fuel System: Upgrade your fuel injectors and pump to support the increased fuel demands of a boosted engine.
  • Tuning: A proper tune is critical to ensure your engine runs safely and efficiently with the turbo.

Conclusion

Choosing the right size turbo for your V8 LS swap is a critical step in achieving your performance goals. By understanding the factors involved in turbo sizing, calculating the appropriate size, and considering popular options, you can set your build up for success. With the right turbo and proper installation, reaching 600+ horsepower is well within your grasp.