The Mazda MX-5 Miata has long been celebrated for its lightweight design and engaging driving experience. For the NC generation (2006–2015), enthusiasts have found that factory power, while adequate for twisty roads, leaves room for improvement when chasing deeper thrills. The Flyin' Miata turbo kit has emerged as a popular upgrade, delivering reliable, substantial horsepower gains. Owners report consistent gains of 40–55 wheel horsepower, with many hitting the sweet spot of a 50 hp increase. This article dives into real-world results, installation details, and long-term ownership insights from the NC Miata community.

The Flyin' Mita Turbo Kit: A Closer Look

Flyin' Miata’s turbo system is engineered specifically for the NC's MZR 2.0L engine. Unlike generic turbo kits that require extensive fabrication, this kit is a bolt-on solution designed for straightforward installation. The core components include a Garrett GT2860RS turbocharger, cast iron manifold, water-to-air intercooler (or optional air-to-air), wastegate actuator, blow-off valve, and a complete set of oil and coolant lines. The kit also comes with a reflash for the factory ECU or an optional standalone engine management system from ECUTek, ensuring proper fueling and ignition timing.

The intercooler system is a standout feature. The water-to-air setup keeps charge temperatures low without adding the large frontal area of a typical air-to-air intercooler. This preserves the Miata’s sleek front end and minimizes boost lag. With boost pressure set to a conservative 8 psi (adjustable up to 10–12 psi with supporting mods), the kit is designed to deliver safe, repeatable power on 91–93 octane pump gas. Flyin' Miata backs the kit with a reputation for reliability, having sold hundreds of units over the past decade.

Installation Process: What Owners Should Expect

Installing the Flyin' Miata turbo kit is a weekend project for experienced DIYers. While the kit is labeled “bolt-on,” it requires a moderate level of mechanical skill. Below is an expanded overview of the installation steps, along with tips from owners who have been through the process.

Step 1: Preparation and Parts Inventory

Before diving in, owners recommend gathering all tools: socket set, torque wrench, gasket sealant, and a set of jack stands. The kit comes with detailed instructions, but verifying all parts – from the turbo manifold to the smallest O-rings – saves headaches. Also, consider replacing the clutch at this stage, as the stock clutch often slips above 230 lb-ft of torque.

Step 2: Removing Stock Components

Start by removing the factory intake air box, exhaust header, and front bumper cover for intercooler access. Drain the coolant and oil. The stock exhaust manifold is particularly stubborn; soaking the bolts with penetrating oil the night before can prevent stud breakage. Owners often replace the factory exhaust studs with stainless steel hardware.

Step 3: Installing the Turbo Manifold and Turbocharger

Bolt the cast iron manifold to the cylinder head using new gaskets. Apply anti-seize to the studs. Mount the GT2860RS turbo to the manifold, ensuring oil and coolant ports align. Owners note that using a high-performance gasket on the turbo-to-manifold flange minimizes exhaust leaks.

Step 4: Intercooler and Piping

Mount the water-to-air intercooler core in the driver’s side radiator area. Run the charge pipes from the turbo compressor outlet to the intercooler, then to the throttle body. Secure all couplers with t-bolt clamps. The water circulation pump and reservoir must be connected; some owners mount the pump near the radiator for easy servicing.

Step 5: Oil and Coolant Lines

Tap the oil pan for the drain line (the kit includes an oil-safe fitting). Feed the oil supply from a sandwich plate between the oil filter and engine block. Connect coolant lines to the turbo’s water jacket. Use high-quality silicone hoses and ensure no kinks are present.

Step 6: ECU Tuning and Final Checks

Install the Flyin' Miata reflash or ECUTek tune via the OBD-II port. The reflash sets base fuel maps, boost target, and timing retard. Check for boost leaks with a pressure test. Prime the oil system by disabling the fuel pump and cranking the engine for a few seconds – this prevents dry starts. Start the engine and let it idle to stabilize.

Total installation time ranges from 12–20 hours for first-timers, with experienced owners completing it in 8–10 hours. Professional shop installation adds $1,000–$1,500 to the total cost.

Real-World Owner Results: Dyno Sheets and Seat-of-the-Pants

To verify the claimed gains, we gathered data from three NC Miata owners who documented their before-and-after dyno runs. All used the standard 8 psi kit with Flyin' Miata reflash on 93 octane.

Owner A: 2010 NC2 – Baseline 167 whp → 221 whp

“I was skeptical about a 50 hp gain from a bolt-on kit, but the dyno doesn’t lie. With only the turbo kit and a Flyin' Miata exhaust, I went from 167 to 221 wheel horsepower – a 54 hp increase. Torque jumped from 141 to 195 lb-ft. The car pulls hard from 3,000 rpm to redline.” This owner reported a best 0–60 time of 5.0 seconds, down from 6.5 seconds stock.

Owner B: 2007 NC1 – Baseline 161 whp → 213 whp

Owner B’s car had a full exhaust (header-back) and CAI before the turbo kit. Baseline was 161 whp. After the kit, he saw 213 whp (52 hp gain). “The mid-range transformation is the biggest surprise. I can pass on two-lane roads without downshifting. The 5,000–7,000 rpm pull is addictive.” He noted that the stock clutch began slipping at 210 whp, so he upgraded to a Flyin' Miata stage 1 clutch.

Owner C: 2013 NC Club – Baseline 172 whp → 224 whp

The NC Club trim came with a slightly different ECU. Owner C’s dyno showed 172 whp stock (some owners report the NC3 having more aggressive factory tuning). After the kit, he peaked at 224 whp – 52 hp gain. “I autocross the car. The power delivery is smooth and predictable. I don’t have to wait for boost; it’s there right away.” He also added an intercooler sprayer for track days.

Across these reports, the average gain is 52–54 wheel horsepower. The 50 hp figure quoted by Flyin' Miata appears conservative. With upgraded injectors (1,000cc) and a more aggressive tune, some owners push to 270 whp, but that extends beyond the intended use range of the kit.

Torque Curve Transformation

Peak horsepower numbers only tell half the story. One of the most praised aspects of the Flyin' Miata turbo kit is the torque delivery. Stock NCs produce a flat torque curve around 140 lb-ft from 4,000–6,500 rpm. After the turbo, torque rises rapidly to over 190 lb-ft from 3,500 rpm onward, with a broad plateau from 4,500 to 6,000 rpm. This makes the car feel significantly faster in everyday driving – merging onto a highway at part throttle now feels effortless.

The water-to-air intercooler keeps intake air temperatures (IAT) low, even on hot track days. Owners report IAT rises of only 10–15°F above ambient during back-to-back pulls, compared to 30–40°F with air-to-air systems. This consistency translates to predictable power delivery.

Daily Driving and Track Performance

The turbo kit transforms the NC Miata without ruining its daily-driver manners. We spoke with owners who use their turbo Miatas as commuters, canyon carvers, and weekend track toys.

Street Driving

Low-lag character is critical for daily use. The GT2860RS spools quickly; light throttle response feels nearly as responsive as the naturally aspirated engine, but a gentle press of the accelerator now summons effortless acceleration. Owners report that power is linear rather than peaky, making it easy to modulate in traffic. Fuel economy sees a slight drop – about 2–3 mpg combined, mainly due to the temptation to use the extra power.

Track Day Performance

On the track, the power increase shaves seconds off lap times. One owner at Laguna Seca dropped from 1:55 to 1:48 after the turbo kit, mainly due to higher exit speeds on turns. The additional torque allows drivers to keep the car in a taller gear through corners, reducing shift transitions. However, owners recommend upgrading the radiator and adding an oil cooler if doing repeated track sessions – the additional heat output requires better thermal management.

Reliability and Long-Term Ownership

Concerns about turbocharging an otherwise reliable engine are common. Flyin' Miata addressed durability by tuning the kit conservatively and supplying high-quality components. We surveyed owners who have driven turbo NCs for 30,000–60,000 miles to gauge reliability.

Common Issues and Maintenance

  • Oil Leaks: The most frequent issue is a small oil seep from the turbo oil return line if not tightened properly. Using a crush washer and a torque wrench eliminates this.
  • Radiator Failure: The stock radiator can cope with street use but may overheat on hot track days. Owners recommend replacing with a Koyo or CSF aluminum radiator.
  • Clutch Upgrades: Almost all owners report needing a stronger clutch within the first 10,000 miles after the kit. Flyin' Miata’s stage 1 organic clutch handles 250 lb-ft easily.
  • Fuel Pump: The stock fuel pump is adequate up to about 230 whp. Above that, a Walbro 255 is recommended.

Preventive Measures

Use full synthetic oil with a high zinc content (like 5W-30) and change it every 5,000 miles. Monitor boost pressure with a gauge – a sudden drop could indicate a boost leak from couplers. Check intercooler fluid level monthly. With these practices, owners have driven over 80,000 miles without major engine issues.

Cost vs. Value: Is the 50 HP Gain Worth It?

The Flyin' Miata turbo kit retails for approximately $4,200 (as of 2024), which includes the turbo, manifold, intercooler, piping, and reflash. Installation adds $1,000–$1,500 if done professionally. That brings the total to around $5,500–$5,700. Dividing by 50 hp yields a cost of about $110–$114 per horsepower. For comparison, individual bolt-ons (intake, exhaust, tune) might produce 10–15 hp for $1,500, equating to $100–$150 per hp, but without the transformative torque increase. Many owners argue the turbo kit offers the best bang-for-buck in the NC aftermarket.

Additional supporting mods – clutch ($400–$800), radiator ($300–$500), oil cooler ($200–$400) – could add $1,000–$1,700. Even so, the total remains under $8,000, which is less than the cost of a supercharger kit (which yields similar peak power but less low-end torque) and far less than an engine swap.

Alternatives and Upgrades

The NC Miata has a few power adder options besides Flyin' Miata’s turbo kit. Understanding the trade-offs helps owners decide.

Supercharger Systems

Kraftwerks and Rotrex offer centrifugal supercharger kits for the NC. They provide linear power but with a higher peak rpm; torque does not build as quickly as the twin-scroll turbo. Superchargers are generally easier to install (no oil lines), but create more parasitic loss and can be louder due to gear whine. Typical gains: 50–60 whp for similar cost.

Other Turbo Kits

Companies like Track Dog Racing and Joe’s Performance have produced turbo kits. Some offer larger turbos for 300+ whp, but require built engines and upgraded drivelines. For a street-focused 250 whp, Flyin' Miata’s kit remains the most documented and supported.

Engine Swaps

Swapping in a Ford 2.5L Duratec (common in the Mazda3) from the same engine family can add 0.5L of displacement and up to 30 hp naturally aspirated. A turbo kit on the 2.5L is possible but involves custom fabrication. This route is for advanced builders.

Conclusion

Flyin' Miata’s turbo kit for the NC Miata delivers on its promise of a 50 horsepower gain at the wheels, with real owners documenting consistent 52–54 whp increases. The kit transforms the NC from a capable sports car into a confident performer without sacrificing daily usability. Installation is achievable by skilled DIYers, and long-term reliability is strong with basic maintenance. For anyone looking to unlock the full potential of their NC Miata, this turbo kit offers a proven, well-supported path to exhilarating performance.

For further reading, check Flyin’ Miata’s official product page (Flyin' Miata turbo kit for NC) and owner build threads on Miata.net Forum. Dyno videos and installation guides are also available on Flyin' Miata’s YouTube channel.