So, you're probably wondering about the top speed of a turbocharged Subaru BRZ, Scion FR-S, or Toyota 86, right? Well, let's dive into what you can realistically expect when you add a turbocharger to these awesome little sports cars. Before we get started, it's important to remember that the actual top speed you achieve will depend on several factors, including the specific turbo kit, engine tuning, supporting modifications, and even environmental conditions. But don’t worry, we’ll break it all down for you.

Understanding the Stock Top Speed

Before slapping on a turbo, it's good to know where you're starting from. In their naturally aspirated (stock) form, the Subaru BRZ, Scion FR-S, and Toyota 86 typically have a top speed around 130-140 mph (approximately 209-225 km/h). This figure is largely limited by the car's aerodynamics and the engine's power output in its factory configuration. The 2.0-liter boxer engine produces around 200 horsepower, which is enough to make the car fun to drive but not necessarily a speed demon on the top end. Keep in mind, this figure can vary slightly depending on the model year and specific trim level, but that's the general ballpark. Remember, guys, always check your specific vehicle's specs for the most accurate information. Now, why is it limited? The stock engine, while peppy, is designed more for balanced performance and reliability rather than outright top speed. The gearing and aerodynamics are optimized for a blend of acceleration and fuel efficiency. So, if you're looking to break past that 140 mph mark, forced induction is definitely the way to go.

Factors Affecting Turbo Top Speed

Okay, so you've decided to boost your BRZ/FR-S/86. Awesome! But what factors will actually determine your new top speed? Let's break it down:

• Turbo Kit: Not all turbo kits are created equal. The size and type of turbocharger, the quality of the intercooler, and the overall design of the kit will significantly impact performance. A well-engineered kit designed for high-end power will generally yield a higher top speed than a budget-friendly kit focused on low-end torque.
• Engine Tuning: This is crucial. A proper tune ensures that your engine is running safely and efficiently with the added boost. A bad tune can lead to engine damage and significantly reduce performance, including top speed. Investing in a professional tuner who knows these cars is worth every penny.
• Supporting Modifications: A turbocharger puts extra stress on your engine and drivetrain. Upgrading components like the fuel injectors, fuel pump, clutch, and even the engine internals (pistons, rods) can help ensure reliability and allow you to safely extract more power, thus increasing your top speed.
• Aerodynamics: While the BRZ/FR-S/86 are sporty, their aerodynamics aren't optimized for extreme top speeds. Adding aerodynamic aids like a front splitter, rear wing, or even a full body kit can reduce drag and improve stability at high speeds, ultimately contributing to a higher top speed.
• Tires and Gearing: Your tires need to be rated for the speeds you're planning to reach. Using tires with a lower speed rating is dangerous. Also, consider the gearing. You might need to adjust the final drive ratio to take full advantage of the added power and achieve a higher top speed.
• Environmental Conditions: Air density, temperature, and even the road surface can affect your top speed. Denser, colder air generally results in better performance. A smooth, dry road will provide better traction and less rolling resistance.

Estimating Top Speed with a Turbo

Alright, let's get down to the nitty-gritty. What kind of top speed can you realistically expect with a turbo kit? This is where things get a little tricky, as it heavily depends on the factors we just discussed. However, we can provide some general estimates:

• Mild Turbo Kit (250-300 whp): With a conservative turbo kit and a safe tune, you can expect to see a top speed increase to around 150-160 mph (241-257 km/h). This is a noticeable improvement over stock and will make the car feel significantly faster.
• Moderate Turbo Kit (300-350 whp): With a more aggressive turbo kit, supporting mods, and a good tune, you could potentially reach top speeds of 160-175 mph (257-282 km/h). At this power level, you'll really start to feel the benefits of the turbocharger.
• Aggressive Turbo Kit (350+ whp): If you're going all-out with a high-performance turbo kit, upgraded internals, and a professional tune, you might be able to push the top speed to 180+ mph (290+ km/h). However, at this level, you're approaching the limits of the car's chassis and aerodynamics, so safety precautions are paramount. It is important to note that exceeding 180mph requires more than just horsepower - it needs aerodynamic considerations and professional driving skills.

Disclaimer: These are just estimates, and your actual top speed may vary. Always prioritize safety and consult with experienced tuners and mechanics before making any modifications to your vehicle. Please be aware that it is illegal and dangerous to test top speed on public roads. It is important to only perform such tests on closed courses or race tracks with appropriate safety equipment and trained personnel. Remember guys, safety first!

Real-World Examples and Considerations

Now, let's talk about some real-world examples. You'll find plenty of BRZ/FR-S/86 owners online who have documented their turbo builds and top speed experiences. Forums and social media groups dedicated to these cars are great resources for gathering information and getting advice from experienced owners. Keep in mind that everyone's experience will be different, and it's important to take everything you read online with a grain of salt.

Here are a few things to consider when researching top speed claims:

• Dyno Numbers vs. Real-World Performance: Dyno numbers are a good indicator of horsepower, but they don't always translate directly to top speed. Factors like aerodynamic drag and rolling resistance play a significant role in real-world performance.
• Measurement Methods: How was the top speed measured? Was it GPS-verified, or was it based on the speedometer? Speedometer readings can be inaccurate, especially at high speeds.
• Road Conditions: Was the top speed achieved on a flat, smooth surface, or was there an incline or decline? Even a slight incline can significantly affect top speed.
• Safety Gear: Has the car been equipped with the necessary safety equipment? Roll cages, racing seats, harnesses, and a fire suppression system are essential for high-speed driving.

Safety First!

I can't stress this enough: safety should always be your top priority. Pushing your car to its top speed is inherently dangerous, and it should only be done in a controlled environment with the necessary safety precautions. Here's a quick rundown of some essential safety measures:

• Track or Closed Course: Never attempt to reach top speed on public roads. Find a reputable race track or closed course where you can safely explore your car's limits.
• Safety Gear: Wear a helmet, racing suit, and gloves. Make sure your car is equipped with a roll cage, racing seats, harnesses, and a fire suppression system.
• Vehicle Inspection: Thoroughly inspect your car before each track day. Check the brakes, tires, fluids, and suspension components.
• Experience and Training: Get proper training from a qualified driving instructor. Learn how to handle your car at high speeds and how to react in emergency situations.
• Know Your Limits: Don't push yourself or your car beyond your capabilities. It's better to be safe than sorry.

Conclusion

So, what's the top speed of a turbocharged Subaru BRZ/Scion FR-S/Toyota 86? The answer, as you've probably gathered, is: it depends. With a well-chosen turbo kit, proper tuning, supporting modifications, and a healthy dose of common sense, you can significantly increase the top speed of your car and enjoy a thrilling driving experience. But always remember to prioritize safety and respect the limits of both your car and your own abilities. Happy boosting, guys, and stay safe out there!