Unlocking the Subaru BRZ’s True Potential

The Subaru BRZ has earned a devoted following thanks to its low center of gravity, near-perfect weight distribution, and razor-sharp chassis. It’s a car that rewards skilled drivers on a twisty road or a track day. But for all its handling brilliance, the factory FA20 naturally aspirated engine leaves many enthusiasts wanting more. With only about 200 horsepower on tap, straight-line acceleration can feel underwhelming, especially when compared to modern hot hatches or turbocharged rivals. This is precisely why the Subaru BRZ turbo swap has become one of the most popular and transformative modifications in the aftermarket world. Whether you choose to add a forced induction kit to the existing engine or perform a full engine swap, the result can be a dramatically faster, more exciting car without sacrificing the handling that makes the BRZ so special.

This comprehensive guide covers everything you need to know about a Subaru BRZ turbo swap: realistic costs broken down by component, a step-by-step overview of the installation process, real-world performance data from owners, supporting mods you cannot overlook, and the critical role of professional tuning. By the end, you’ll have a clear picture of what it takes to turn your BRZ into a turbocharged thrill machine.

Understanding the Turbo Swap Options for the BRZ

Before diving into costs and installation, it’s important to clarify what “turbo swap” means in the context of the Subaru BRZ. There are two main paths:

Adding a Turbocharger to the Factory FA20 Engine

This is the most common and cost-effective route. A complete bolt-on turbo kit (such as those from Full-Race, GReddy, or AVO Turboworld) includes a turbocharger, exhaust manifold, downpipe, intercooler, piping, blow-off valve, and often a reflash for the factory ECU or a piggyback tuning device. The FA20 engine can safely handle moderate boost (around 8–10 psi) with proper tuning and supporting modifications. Power outputs range from 275 to 350 wheel horsepower, transforming the car’s character while retaining the original engine and transmission.

Full Engine Swap to a Turbocharged Powerplant

Some builders choose to completely replace the FA20 with a turbocharged engine – most often the Subaru EJ20 or EJ25 from the WRX/STI, or even a 2JZ-GTE from Toyota. This approach yields much higher power potential (400–600+ hp) but involves extensive fabrication, custom engine mounts, wiring harness modifications, and often a stronger transmission and differential. Costs skyrocket, and the car becomes a dedicated project vehicle. For most enthusiasts seeking a reliable daily driver or weekend track car, the bolt-on turbo kit to the FA20 is the more practical choice.

Detailed Cost Breakdown of a BRZ Turbo Swap

Costs vary significantly based on the turbo kit’s quality, whether you install it yourself or hire a shop, and what supporting modifications you need. Below is a realistic breakdown of the major expense categories.

  • Turbocharger Kit (complete): $2,500 – $5,500. This includes the turbo, manifold, downpipe, intercooler, piping, and hardware. Higher-end kits use ball-bearing turbos and equal-length manifolds for better spool and horsepower.
  • Engine Management / Tuning: $600 – $2,000. Options include an ECUTek reflash ($600–$900 plus tuning time), a standalone ECU like Haltech or Motec ($1,500–$3,500), or a piggyback system. Most shops charge $500–$1,000 for dyno tuning.
  • Professional Installation Labor: $800 – $2,500. If you’re not mechanically inclined, expect to pay a performance shop anywhere from 8 to 20 hours of labor. High-end fabricators may charge more.
  • Fuel System Upgrades: $400 – $1,200. For safe power levels above 300 hp, you’ll need higher-flow fuel injectors and a fuel pump. Some kits require a return-style fuel system.
  • Exhaust System (cat-back or full): $500 – $1,500. A less restrictive exhaust helps the turbo breathe and spool quicker. Some kits include a downpipe, but a cat-back may be extra.
  • Clutch & Flywheel: $500 – $1,200. The factory clutch is marginal above 300 hp. A heavier-duty clutch (e.g., Stage 2 or Stage 3) is essential.
  • Cooling Upgrades (radiator, oil cooler): $400 – $1,000. Turbocharging adds significant heat. An upgraded radiator and a quality oil cooler protect the engine during sustained hard driving.
  • Miscellaneous (gaskets, fluids, lines, spark plugs): $200 – $500. Small parts add up.

Total Estimated Cost (DIY with quality kit): $5,200 to $8,000
Total Estimated Cost (shop-installed with all supporting mods): $8,000 to $14,000+

Keep in mind that reliability mods like an air-oil separator and a catch can ($150–$300) are wise investments to prevent oil ingestion in the intake tract.

Installation Process and Complexity

Installing a turbo kit on a Subaru BRZ is a demanding job that assumes a good level of mechanical experience. While a few bolt-on kits claim “no drilling required,” you will still need to remove the front bumper, intercooler, radiator, and possibly the intake manifold. Here is a high-level overview of the steps:

1. Preparation and Disassembly

Begin by draining the coolant and oil. Remove the front bumper cover, headlights, and intercooler/radiator support. The stock intake and exhaust manifolds must be removed. If you’re doing a full engine swap, the entire engine and transmission come out.

2. Turbo System Installation

Mount the new exhaust manifold (often with heat wrap or ceramic coating to manage engine bay temperatures). Install the turbocharger, oil feed and drain lines, and the downpipe. The intercooler (typically a front-mount) goes in place of the factory front bumper structure, requiring some trimming of the plastic bumper support.

3. Piping and Intercooler

Route the charge pipes from the turbo to the intercooler and then to the throttle body. This often requires relocating the washer fluid reservoir or horn. Silicone hoses and T-bolt clamps are preferred for high-boost applications.

4. Fuel and Engine Management

Install the upgraded fuel pump and injectors. Wire the turbo’s boost control solenoid and any additional sensors (wideband O2, manifold absolute pressure sensor). If using ECUTek, flash the base map supplied by the tuner. For a standalone ECU, complete the wiring harness integration.

5. Cooling and Reassembly

Install the upgraded radiator and oil cooler. Refill fluids. Reassemble the front bumper and test all connections. A critical step is to perform a leak test on the intake system.

6. Dyno Tuning

Even with a base map, a proper dyno tune is essential for safe operation. The tuner will adjust ignition timing, air-fuel ratios, and boost levels. Expect a full day on the dyno.

Professional installation is highly recommended unless you have experience with forced induction builds. Many shops that specialize in Subaru FA20 platforms can do the job in 1–2 weeks. DIY builders should budget at least 40–60 hours of labor for a first-time turbo install.

Real-World Performance Results and Owner Experiences

Subaru BRZ turbo swap results vary depending on the boost level, turbo size, and tuning quality. However, consistent patterns emerge from the enthusiast community. We’ve gathered real dyno sheets and owner reports from forums like FT86club and NASIOC.

Power Gains and Dyno Numbers

Most well-executed bolt-on turbo kits (8–10 psi) produce between 275 and 330 wheel horsepower on an FA20. That’s roughly a 60–90% increase over the stock 180 whp. Torque jumps to 250–290 lb-ft, which dramatically improves mid-range punch. A few aggressive setups on e85 fuel have pushed past 400 whp, but these require forged internals and are not street-reliable.

Acceleration and Track Performance

Stock BRZ 0–60 mph times hover around 6.0–6.2 seconds. A turbocharged example can easily drop into the high 4-second range (4.5–4.8 seconds) with a good launch. Quarter-mile times go from the mid-14s to the low 12s or even high 11s with sticky tires. On track, the added power allows quicker out-of-corner acceleration, though drivers may need to adjust braking points due to higher entry speeds.

Owner Testimonials

“Before the turbo, the BRZ felt like a momentum car. Now it pulls hard from 3500 rpm all the way to redline. It transformed the car into something truly special – I never imagined a chassis this good with actual power.” – Mike R., 2016 BRZ Limited

“I went with a Full-Race kit and ECUTek tune. After 15,000 miles of mixed driving and autox, no issues at all. Just keep the oil changes frequent and don’t push boost without proper cooling.” – Sarah K., 2014 BRZ

“I tried the cheap route with a used eBay kit. On the dyno it made decent power, but the fitment was horrible and I had boost leaks constantly. Save up for a quality kit or you’ll chase problems forever.” – Daniel T., 2017 BRZ

Essential Supporting Modifications for a Reliable Turbo BRZ

A turbo swap is not just about bolting on parts. The following upgrades are critical to reliability and performance:

  • Oil Cooling: The FA20 is prone to high oil temperatures under track use. An aftermarket oil cooler (e.g., Setrab, CSF) is mandatory for any turbo car that sees sustained high RPM.
  • Catch Can / AOS: Direct-injection engines produce blow-by. An air-oil separator prevents oil from entering the intake tract, which can cause detonation on the turbo setup.
  • Clutch Upgrade: The stock clutch slips around 300 ft-lb. An ACT or Exedy Stage 2 clutch holds up to 400 ft-lb while still being daily-drivable.
  • Brake Upgrades: With more power, you need more stopping force. Upgraded pads, stainless lines, and higher-temp brake fluid are wise. Some owners also upgrade to Brembo calipers from the STI.
  • Suspension Tuning: The extra front-end weight from the turbo and intercooler may upset the handling. Adjustable coilovers or upgraded sway bars can restore balance.
  • Tires: Stock tires will spin through first and second gear. 245 or 255 width performance summer tires are recommended to put the power down.

Tuning – The Critical Success Factor

The quality of your tune determines whether your turbo swap is a dream or a nightmare. Poorly calibrated air-fuel ratios can melt pistons in minutes. Work with a tuner who has extensive experience on the FA20 platform. ECUTek is the most popular tuning solution for the BRZ, offering user-friendly datalogging and safety features like knock control and boost cut. A dyno tune is strongly preferred over an off-the-shelf map because every car’s hardware and fuel quality are different.

For those chasing big power (over 350 whp), a standalone ECU like the Haltech Elite 1500 or Motec M130 gives full control over auxiliaries (boost control, flex fuel, launch control) but requires skilled wiring and calibration.

Alternative Paths: Supercharging, Built Motor, or Full Swap

A turbo swap is not the only way to add power to a BRZ. Weighing alternatives can help you decide the best direction for your goals and budget.

  • Supercharging: Centrifugal supercharger kits (e.g., Jackson Racing, Edelbrock) offer linear power with immediate throttle response. They are easier to install than turbo kits and produce similar peak horsepower (250–310 whp). However, peak torque is lower and boost builds with RPM. Superchargers may be more reliable for daily driving.
  • Built FA20 Motor: For those wanting a high-revving naturally aspirated build, forged internals, ported heads, and ITBs can push power to 240 whp naturally – but at a cost comparable to a turbo swap with less ultimate output.
  • Full Engine Swap (EJ207/R, 2JZ, LS3): This is a path for hardcore builders. Cost can easily exceed $25,000, but the result is a 500+ hp beast. Custom subframes, transmission adapters, and wiring are required. The chassis must be reinforced.

For most enthusiasts, a well-executed bolt-on turbo kit provides the best balance of power, cost, and drivability.

Conclusion

A Subaru BRZ turbo swap is one of the most rewarding modifications you can make to an already exceptional sports car. The costs are significant – typically $6,000 to $12,000 for a reliable setup – but the performance gains are transformative. With a proper kit, supporting mods, and expert tuning, your BRZ can become a genuine sports car contender that pulls hard, corners flat, and brings a smile to your face every time you drive it.

Before you begin, research your chosen turbo kit thoroughly, talk to owners who have completed the swap, and budget for professional tuning. Avoid the temptation to cut corners on cheap parts or a mediocre tune – a blown engine is far more expensive than doing it right the first time. For more detailed build threads and community advice, visit FT86club’s forced induction forum and check out Delicious Tuning for ECUTek support. If you are considering a full engine swap, NASIOC’s built motor forum is an invaluable resource. With careful planning and execution, your turbocharged Subaru BRZ will deliver thrills that last for years.