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Choosing the right precision turbo for your 700 horsepower street car is a critical decision that can significantly impact performance, drivability, and reliability. Whether you’re building a high-performance machine for the street or looking to enhance your existing setup, understanding the key factors involved in selecting a turbocharger is essential.
Understanding Turbochargers
A turbocharger is a forced induction device that uses exhaust gases to spin a turbine, which then compresses the intake air, allowing for more air and fuel to enter the engine. This process increases power output significantly. When selecting a turbo, it’s important to consider the following:
- Turbo size and type
- Compressor and turbine efficiency
- Boost levels
- Engine displacement
Key Factors to Consider
1. Turbo Size and Type
The size of the turbocharger plays a crucial role in its performance. A larger turbo can produce more power but may have a slower spool time, which can affect drivability. Conversely, a smaller turbo may spool quickly but could limit peak power. For a 700 hp street car, consider a turbo in the range of 76mm to 80mm.
2. Compressor and Turbine Efficiency
Efficiency maps are essential tools for evaluating turbocharger performance. Look for a turbo with a high efficiency rating in the desired operating range. This will help maximize power output while minimizing lag and heat generation.
3. Boost Levels
Boost pressure directly affects horsepower. For a 700 hp goal, you may need to run between 15 to 25 psi of boost, depending on your engine’s setup and fuel type. Ensure your turbo can handle the desired boost levels reliably.
4. Engine Displacement
Your engine’s displacement influences how much air and fuel it can utilize. Larger engines can typically support larger turbos and higher boost levels. Understanding your engine’s characteristics will help in selecting the right turbo size.
Popular Precision Turbos for 700 HP Applications
Several Precision Turbo models are well-suited for achieving 700 hp in street applications. Here are a few options to consider:
- Precision 7675 – A popular choice for 700 hp builds, offering a good balance of spool time and power.
- Precision 7685 – Slightly larger than the 7675, providing more potential for power at the expense of spool time.
- Precision 7875 – Ideal for those looking to push the limits while maintaining streetability.
Supporting Modifications
Installing a precision turbo is just one part of the equation. To safely achieve 700 hp, consider the following supporting modifications:
- Upgraded fuel system
- High-performance intercooler
- Stronger engine internals
- Upgraded transmission components
- Boost control system
Tuning for Performance
After selecting the right turbo and making supporting modifications, proper tuning is essential. A professional tuner can optimize your engine’s performance to ensure reliability and efficiency. Key tuning aspects include:
- Fuel mapping
- Ignition timing
- Boost control settings
- Air-fuel ratio adjustments
Conclusion
Choosing the right precision turbo for your 700 hp street car requires careful consideration of various factors, including turbo size, efficiency, and supporting modifications. By understanding your goals and making informed decisions, you can create a powerful and reliable street machine that delivers thrilling performance.