The Subaru BRZ and its sibling, the Scion FR-S and Toyota 86, are powered by the FA20 engine—a 2.0-liter boxer-four that has become a darling of the tuner world. While the FA20 delivers a balanced chassis and responsive handling from the factory, many owners seek more power. One of the most cost-effective ways to unlock hidden potential is through a performance chip or ECU tune. This article dives deep into the top five performance chips for the BRZ FA20, explaining how they work, the real-world gains you can expect, and what to consider before buying.

Understanding Performance Chips for the FA20 Engine

The FA20 engine is naturally aspirated and features both direct injection and port injection (D-4S). Its factory ECU calibration is conservative to meet emissions and fuel economy regulations. A performance chip—whether a handheld tuner, a piggyback module, or a reflash tool—alters the engine control unit’s parameters. This includes adjusting fuel maps, ignition timing, throttle response, and sometimes variable valve timing. The result is a noticeable increase in horsepower and torque, often accompanied by improved drivability.

There are three main types of tuning solutions for the FA20: handheld flash tuners (like the Cobb Accessport), reflash software (like EcuTek), and piggyback modules (such as Vishnu’s offerings). Each has its strengths, and the best choice depends on your skill level, future modification plans, and budget. Below we cover the top five options that consistently deliver results.

1. EcuTek ProECU Tune

EcuTek’s ProECU is arguably the gold standard for FA20 tuning. It is a professional-grade reflash tool used by many Subaru specialists. Unlike a simple piggyback, the ProECU directly overwrites the factory ECU firmware, giving tuners complete control over every parameter. This includes launch control, flat-foot shifting, and flex fuel support. EcuTek also offers a Master Flash feature that allows tuners to remotely update your calibration.

  • Power Gains: 30–40 hp at the wheels on a stage 1 calibration (93 octane). With bolt-on modifications and E85, gains can exceed 60 hp.
  • Tuning Options: Fully customizable maps; multiple maps can be switched on the fly (e.g., valet mode, economy mode, race fuel map).
  • Compatibility: Works with virtually all aftermarket intakes, exhausts, headers, and E85 systems.
  • Installation: Requires a laptop and a cable; the actual reflash takes about 10 minutes. However, you need a tuner to create the custom calibration unless you purchase an off-the-shelf (OTS) map from a reputable shop.
  • Pros: Deepest level of control, excellent data logging, strong community support.
  • Cons: Not plug-and-play; requires professional tuning or purchase of a pre-loaded map.

EcuTek is the go-to choice for serious track rats and those planning extensive modifications. Visit EcuTek’s official site for more details and dealer locator.

2. Cobb Tuning Accessport V3

The Cobb Accessport V3 is the most popular handheld tuner in the Subaru world. It comes pre-loaded with off-the-shelf (OTS) maps for the FA20, including stage 1 (stock intake/exhaust), stage 2 (with aftermarket intake and catback), and stage 3 (with headers and full exhaust). The device can also monitor real-time engine data (boost, AFR, coolant temp, knock) and serve as a diagnostic tool. Cobb’s tuning software (Accesstuner) allows advanced users to make custom modifications.

  • Power Gains: 25–35 hp at the wheels on stage 1 (93 octane). Stage 2 gains are around 30–40 hp, and stage 2 with flex fuel can reach 50+ hp.
  • Features: Real-time gauges, code reading, and clearing; includes a mount for dash or windshield.
  • Installation: Plug-and-play. Plug the Accessport into the OBD-II port, select the map, and the reflash takes about 10 minutes.
  • Pros: Extremely user-friendly, excellent resale value, large community with many OTS maps available from third parties.
  • Cons: OTS maps are generic; for maximum power or unusual setups you will need a custom tune (and the Accessport software upgrade).

The Accessport is ideal for DIY owners who want a reliable tune without visiting a dyno. It’s also a great entry point into FA20 tuning. Check Cobb’s product page for specific BRZ/FR-S applications.

3. Vishnu Tuning Stage 1 Chip (OFG/OFM)

Vishnu Tuning, known for its work on the Subaru platform, offers the OpenFlash Tablet (OFT). This is a handheld device similar to the Accessport but more budget-friendly. The Stage 1 chip or tune refers to the OTS map that Vishnu provides for the FA20. The OFT can also be used to log data and flash custom tunes. Vishnu’s stage 1 tune is specifically designed for stock engines and is known for smoothing out the torque dip around 4,000 rpm.

  • Power Gains: 20–30 hp at the wheels with 93 octane. Gains are modest but with a noticeable improvement in mid-range torque.
  • Benefits: Improved throttle response, reduced torque dip, smoother power delivery.
  • Installation: Easy plug-and-play process via OBD-II port. The OFT comes with a touchscreen interface.
  • Pros: Lower cost than Cobb or EcuTek, includes free OTS maps, supports custom tuning via open source software (RomRaider).
  • Cons: OTS maps are not as thoroughly developed as Cobb’s; customer support can be less responsive; the tablet interface feels dated.

The OpenFlash Tablet is a solid choice for budget-conscious builders who still want a reliable tune. It works well for a basic stage 1 setup. See Vishnu’s official site for more information.

4. MAPerformance Stage 1 Tune (via Accessport or EcuTek)

MAPerformance is a well-known tuning company that offers custom calibrations for the FA20. Their Stage 1 tune is available for either the Cobb Accessport (as a MAP-specific OTS map) or as an EcuTek reflash. MAPerformance’s tune is iterationally improved through data feedback from many customer cars. They emphasize reliability and drivability while still adding significant power.

  • Power Gains: 30 hp at the wheels on 93 octane (verified on their Mustang dyno). With their stage 1 tune, they also offer a version for E85 that can push 45–50 hp.
  • Features: Enhanced fuel mapping for better cruising efficiency, improved throttle mapping, and built-in safety limits.
  • Support: Known for excellent customer service; they provide free revisions for the life of the vehicle if you buy their tune (with your own Accessport).
  • Installation: If using Accessport, just load the MAPerformance map; if using EcuTek, you’ll need to download the calibration file and flash via cable.
  • Pros: Custom-tailored for BRZ/86, proven on thousands of cars, includes e-tuning support.
  • Cons: Only available for Accessport or EcuTek hardware; you still need to purchase the tuning device separately.

MAPerformance is an excellent middle ground—you get a purpose-built calibration without the full expense of a dyno tune. Check out MAPerformance’s BRZ tune page for available packages.

5. GrimmSpeed E85 Flex Fuel Kit (E85 Tuning Required)

The fifth option is not a standalone chip but a flex fuel kit that must be combined with an EcuTek or Accessport custom tune. The GrimmSpeed E85 Flex Fuel Kit adds a sensor that reads the ethanol content in your fuel and allows the ECU to adjust timing and fueling in real time. This is the most impactful power adder for a naturally aspirated FA20 because ethanol has a higher octane and cooling effect. The kit includes a fuel pressure regulator, lines, and the sensor controller. You’ll need a tune that supports flex fuel logic (only EcuTek and Cobb provide this, but Cobb requires patented Flex Fuel via Cobb’s own solution).

  • Power Gains: Up to 50 hp at the wheels when running E85 with a full exhaust (header, catback, intake). On a tuned stock engine, gains are around 30–40 hp.
  • Benefits: Huge octane boost (E85 is ~104 octane compared to 93 pump), reduces knock, improves thermal efficiency.
  • Considerations: Requires an ethanol-compatible tune; not plug-and-play—installation involves plumbing into the fuel line. Also, E85 reduces fuel economy and may not be available everywhere.
  • Compatibility: Works with any FA20 ECU, but you need a tuner who can write a flex fuel calibration. Many popular tuners (e.g., Delicious Tuning, Moto-East) offer flex fuel maps.
  • Pros: Largest potential power gain, safe knock margin, ability to run any blend of pump gas and ethanol.
  • Cons: More complicated install, need to find E85 stations, may void some drivetrain warranties.

For maximum naturally aspirated power, the GrimmSpeed E85 Kit combined with a proper tune is unbeatable. See GrimmSpeed’s product page for the kit details and installation instructions.

How to Choose the Right Performance Chip for Your BRZ FA20

Selecting a performance chip is not a one-size-fits-all decision. Consider the following factors:

  • Your End Goals: If you just want a daily driver with a bit more punch, a Cobb Accessport with an OTS map is sufficient. If you plan to track the car and add headers, a full EcuTek custom tune is better.
  • Future Modifications: Think ahead. If you intend to install a supercharger later, choose a system that scales (EcuTek or Cobb with flex fuel).
  • Budget: The Accessport costs around $650, the OpenFlash Tablet around $500, and an EcuTek cable plus custom tune can exceed $800. Factor in the cost of a professional tune if you go that route.
  • Skill Level: Novices will appreciate the simplicity of a pre-loaded Accessport. Enthusiasts comfortable with data logging and tuning software may prefer EcuTek.
  • Availability of Good Tuners: EcuTek tuning requires a licensed dealer, so if there’s no good tuner near you, Cobb or MAPerformance remote tunes are safer.

Frequently Asked Questions

Do I need a performance chip for a stock BRZ?

No, but a tune significantly improves throttle response and mid-range torque. Many owners report the car feels “how it should have come from the factory.”

Can I install a performance chip myself?

Yes, for handheld flashers (Cobb, OFT) the process is straightforward: plug into the OBD-II port, follow on-screen prompts. For EcuTek, you need a laptop and basic computer skills but still DIY-friendly.

Will a chip void my warranty?

Any ECU modification can be detected by the dealer using flash counters. If your car is under warranty, consider a piggyback system that doesn’t overwrite the ECU, but those are less common. Many owners tune after warranty expires.

What is the safest device?

All five options are safe when using a proper tune designed for your setup. The most important factor is to monitor knock and air/fuel ratios—Cobb and EcuTek provide data logging.

Do I need other modifications to see gains?

Stage 1 tunes are for stock cars. Larger gains come with a full exhaust (headers and catback) and an intake. The E85 kit requires at least a tune and good fuel injectors (stock injectors handle up to around 220 whp).

Conclusion

Maximizing BRZ FA20 power starts with the right tune. The EcuTek ProECU offers the most flexibility and highest potential, the Cobb Accessport V3 provides an excellent balance of ease and performance, the Vishnu OpenFlash Tablet is a budget-friendly entry point, MAPerformance delivers a proven custom off-the-shelf map, and the GrimmSpeed E85 Kit unlocks the biggest gains for those willing to commit to ethanol. Whichever route you choose, always work with a reputable tuner or use well-reviewed OTS maps. Your BRZ will reward you with a more responsive, exciting driving experience.

For additional reading, check out the FT86 Club forums for owner experiences and dyno charts on each of these products.