Understanding Miata Superchargers: A Performance Primer

The Mazda MX-5 Miata has earned its reputation as one of the most engaging sports cars ever built, thanks to its lightweight chassis, near-perfect balance, and responsive handling. However, the stock engine—whether the 1.6L, 1.8L, or the later 2.0L—leaves many enthusiasts wanting more grunt. Adding a supercharger is one of the most effective ways to transform the Miata’s driving dynamics while preserving the linear, instant throttle response that makes the car so enjoyable. Unlike turbochargers, which spool up with exhaust pressure, superchargers are belt-driven, delivering power almost immediately from idle and building smoothly through the rev range. This makes them ideal for street driving, autocross, and track duty where predictable power delivery matters.

Choosing the right supercharger kit depends on your Miata generation, power goals, budget, and intended use. The aftermarket has matured over decades, and several brands have established themselves as leaders. Below we examine the top five supercharger brands for the Miata, diving into their specific kits, performance numbers, installation complexity, and the types of builds they suit best.

1. Jackson Racing

Heritage and Pedigree

Jackson Racing has been a cornerstone of the Miata performance community since the early 1990s. Their supercharger kits are based on Eaton Roots-type blowers (M45, M62, and later TVS units) and are known for their reliability, comprehensive engineering, and bolt-on installation. Jackson Racing focuses on delivering street-friendly power gains that do not compromise the Miata’s daily-driver manners.

Key Kit Models

  • M45 Kit (1.6L NA & 1.8L NA/NB): The venerable M45 is a small-displacement Roots blower that provides approximately 140–155 whp on a stock 1.8L. It is CARB-legal (EO number D-440-8) and includes a cast aluminum intake manifold, fuel pressure regulator, and all necessary hardware.
  • M62 Kit (1.8L NB & NC): A larger Eaton M62 (also known as the MP62) steps up output to around 180–200 whp on the NB and 200–220 whp on the NC with proper tuning. This kit comes with an intercooler or water-to-air aftercooler depending on the version, plus upgraded injectors and a reflash for the NB.
  • TVS900 Kit (NC & ND): The latest generation uses the Eaton TVS900 twin-vortex blower, offering even higher efficiency and up to 230–250 whp on the NC and 230–260 whp on the ND. It includes a high-flow intake, intercooler, and a CARB-legal tune.

Performance and Drivability

Jackson Racing kits are praised for their linear power delivery. The Roots design provides boost from idle with no lag, making the car feel significantly quicker without being unruly. Owners report that the car retains its stock-like character at partial throttle, and the supercharger whine adds an addictive soundtrack. With proper fueling and timing control, the kits are safe on stock internals up to about 200–210 whp. Beyond that, forged pistons and rods become advisable.

Installation and Support

Installation is well-documented and can be completed by a competent DIYer over a weekend. Jackson Racing provides detailed instructions, and the company’s technical support is highly regarded. All necessary components are included, though you may need to purchase additional tools (e.g., a pulley puller). The kits are CARB-legal for many applications, making them a top choice for owners in emissions-regulated states.

Pros and Cons

  • Pros: Excellent reliability, CARB-legal options, complete kits, strong vendor support, great for street and autocross.
  • Cons: Limited top-end power compared to centrifugal blowers; M45 can feel small for heavily modified engines; price point is higher than some DIY alternatives.

Ideal Build

Jackson Racing is best for daily drivers and weekend warriors who want a proven, turnkey solution that passes smog checks and delivers consistent performance with minimal fuss.

2. Flyin' Miata

An Integrated Approach

Flyin' Miata (FM) is arguably the most well-known aftermarket specialist for the Miata, offering everything from suspension to turbo kits and superchargers. Their supercharger line uses the Rotrex C15-60 or C30-94 centrifugal compressor, which is belt-driven but operates like a turbocharger with increasing boost as RPM rises. Flyin' Miata’s kits are engineered to work seamlessly with their other components (clutch, radiator, exhaust) and come with a custom ECU calibration via ECUtek or the Flyin' Miata reflash.

Key Kit Models

  • Coldside Supercharger Kit (NB & NC): The classic “coldside” Rotrex kit places the blower on the intake side, reducing intake air temperature and keeping a clean engine bay. It produces 190–210 whp on the NB and 200–230 whp on the NC. Includes intercooler, injectors, and a reflash.
  • Hotside Supercharger Kit (NA & NB): A more affordable option that mounts the Rotrex on the exhaust side. Power is similar at around 180–200 whp, but the hotside is slightly less efficient due to longer intake piping. Still a very effective street kit.
  • Big Boost Kit (NA/NB): For those chasing higher numbers, FM offers a larger Rotrex head unit, larger intercooler, and a fuel system upgrade to support 250+ whp. This kit requires forged internals and a standalone ECU.

Performance and Drivability

The Rotrex centrifugal supercharger delivers a power curve that feels like a small-displacement turbo—gentle down low with a strong pull from 4,500 RPM to redline. This suits drivers who enjoy revving the engine out and prefer a more aggressive top-end surge. The kits are known for their durability; the Rotrex unit itself is oil-lubricated and can run for well over 100,000 miles with proper maintenance. FM’s calibration is conservative and safe on stock engines up to the 210-whp threshold.

Installation and Support

Flyin' Miata provides comprehensive instructions and phone support. The coldside kit is more complex to install because it requires relocating the alternator and trimming some brackets, but the result is a very clean setup. Most DIYers with moderate mechanical skills can complete the job in a weekend. FM also offers turnkey installation at their Colorado facility.

Pros and Cons

  • Pros: High-quality Rotrex blower, excellent top-end power, FM’s integrated ecosystem (clutch, suspension, brakes), good support and community.
  • Cons: Centrifugal lag below 4,000 RPM (some prefer Roots for instant response), coldside requires more work to install, not CARB-legal for many configurations.

Ideal Build

Flyin' Miata superchargers suit track-day enthusiasts and autocrossers who want a strong powerband that rewards aggressive driving. The coldside kit is especially popular for those who value engine bay aesthetics and low intake temperatures.

3. Edelbrock

Eaton TVS Technology

Edelbrock entered the Miata supercharger market with a kit that uses the Eaton TVS900 twin-vortex blower—the same technology found in many factory supercharged vehicles (e.g., Mustang GT350, Chevrolet Corvette ZR1). The Edelbrock kit was developed in partnership with Magnuson Products and is designed specifically for the NC (2006–2015) and ND (2016–present) Miata. It is CARB-legal for the NC and ND.

Key Kit Details

  • NC Kit (Eaton TVS900): Produces 210–225 whp on a stock 2.0L NC, with 190 ft-lb of torque. The kit includes a cast aluminum intake manifold, air-to-water intercooler, fuel injectors (550cc), and a reflash via ECUtek or MazdaEdit. Boost is around 7–8 psi.
  • ND Kit (Eaton TVS900): Yields 215–235 whp on an ND1 (2016–2019) and up to 240 whp on an ND2 (2019+) thanks to the higher-flowing cylinder head. The ND kit also includes a water-to-air intercooler, high-flow fuel pump, and a custom tune.

Performance and Drivability

The TVS blower is incredibly efficient, with minimal parasitic loss and outstanding heat dissipation. Power comes on immediately, similar to Jackson Racing’s Roots design, but the twin-vortex rotor profile reduces noise and improves thermal efficiency. The result is a silky-smooth torque curve that makes the Miata feel significantly stronger through the midrange. The intercooler (water-to-air) keeps intake temperatures low even during repeated hard pulls, making it an excellent choice for canyon carving or track sessions.

Installation and Support

Edelbrock includes a detailed instruction manual and all hardware. The kit replaces the entire intake manifold and uses the factory radiator for the intercooler heat exchanger. Install time is around 8–10 hours for a first-timer. Edelbrock’s customer service is responsive, and the tune is robust enough for daily driving out of the box.

Pros and Cons

  • Pros: Factory-level fit and finish, CARB-legal for NC/ND, excellent powerband, integrated water-to-air intercooler, strong low-end torque.
  • Cons: Only available for NC and ND (not NA/NB), expensive compared to some DIY kits, limited top-end compared to a centrifugal at the same boost level.

Ideal Build

Edelbrock is the premium choice for NC and ND owners who want a supercharger with OE quality, full emissions compliance, and a broad, usable powerband for street and occasional track use.

4. Vortech

Centrifugal Power Pioneers

Vortech Engineering has been a leader in centrifugal supercharger technology since the 1990s. Their Miata kits are based on the V3 Si or V7 YSi head units, which are self-contained (oil-fed) and highly efficient. Vortech superchargers are known for their ability to produce high boost pressures and substantial top-end horsepower while maintaining moderate underhood temperatures. They offer kits for the NA, NB, and NC Miatas.

Key Kit Models

  • V3 Si Kit (NA/NB 1.8L): Designed for street use, this kit delivers 200–220 whp at 8 psi with an air-to-air intercooler. It includes a cast discharge tube, polished head unit, and a reflash for the NB (or FMU fuel management for NA).
  • V7 YSi Kit (NA/NB & NC): A larger frame supercharger capable of 260–300+ whp with the right fuel system and engine internals. This is a track-focused kit that requires a standalone ECU and often a built motor. Boost can be adjusted with pulley swaps.
  • Complete System: Vortech sells a “complete system” that includes a high-flow intake, blow-off valve, and optional intercooler. The kits are available in polished or satin finishes.

Performance and Drivability

Like other centrifugals, Vortech’s power delivery is more progressive than a Roots blower. Below 3,500 RPM the car feels nearly stock; then the boost builds strongly as revs climb, pulling hard all the way to the limiter. This characteristic suits drivers who love to rev and want maximum top-end charge. The supercharger whine is distinct and aggressive. With the V7 YSi and proper support, a Miata can reach well over 300 whp, putting it in the realm of serious track weapons.

Installation and Support

Vortech kits are well-engineered but require more mechanical expertise than a typical bolt-on. The head unit must be mounted on a bracket that replaces the AC compressor (if equipped) or alternator location, and plumbing the intercooler piping can be tight. Vortech offers technical support by phone, but the huge community of Vortech Miata owners on forums like Miata.net provides ample guidance.

Pros and Cons

  • Pros: Massive top-end power potential, efficient centrifugal design, good for high-boost builds, relatively quiet at cruise (less whine than Roots).
  • Cons: Not CARB-legal for most configurations, requires more fabrication/welding for some installs, low-rpm torque is lacking compared to Roots, tuning complexity increases with higher boost.

Ideal Build

Vortech superchargers are ideal for enthusiasts who prioritize peak horsepower and are willing to invest in the supporting mods (fuel system, engine management, cooling). They excel in time attack, open track days, and high-speed road courses where top-end power is critical.

5. Kraftwerks

Rotrex Centrifugal Expertise

Kraftwerks USA specializes in Rotrex-based supercharger kits, offering complete bolt-on solutions for the NA, NB, NC, and ND Miatas. Their kits are known for high quality, a strong focus on cooling, and competitive pricing. Kraftwerks uses the Rotrex C15-60, C30-94, and C38-81 head units depending on the power target. They are a favorite among budget-conscious builders who still want a reliable, high-performance centrifugal setup.

Key Kit Models

  • Kit #1 (NA6 & NA8): Uses the Rotrex C15-60, producing 175–190 whp on a stock 1.6L and 195–210 whp on a 1.8L. Includes an air-to-air intercooler, intake, fuel pressure regulator (for NA) or reflash (for NB swaps), and a high-flow oil pump.
  • Kit #2 (NB & NC): Step up to the Rotrex C30-94 head unit for 220–240 whp. This kit comes with a larger intercooler, harness block, and a choice of standalone or piggyback tuning (e.g., PC Pro). Kraftwerks also offers a “Track Pack” with upgraded cooling and a larger intercooler.
  • Kit #3 (ND): A relatively new offering for the ND (2016+) using the C30-94, targeting 210–230 whp with a CARB-legal tune pending. The ND kit includes a water-to-air intercooler that fits behind the factory bumper.

Performance and Drivability

Kraftwerks kits share the same characteristic as Flyin' Miata’s Rotrex: excellent top-end with a linear build-up. However, Kraftwerks often provides a more aggressive tune out of the box, which can yield slightly higher peak numbers than equivalently sized FM kits. The air-to-air intercooler works well for street and autocross; for sustained track use, the water-to-air option or an upgraded radiator is recommended. The supercharger whine is noticeable but not intrusive.

Installation and Support

Kraftwerks provides detailed instructions and video guides on their website. The kits are designed to be installed without welding or drilling, using factory mounting points. Most DIYers can complete the job in 8–12 hours. Kraftwerks’ customer support is responsive, and they actively participate in Miata forums. However, some users note that the supplied tuning (e.g., PC Pro piggyback) may require additional refinement for peak performance; a standalone ECU is recommended for higher boost levels.

Pros and Cons

  • Pros: Good value for power, reliable Rotrex units, strong support, available for all generations, upgradeable to larger Rotrex heads.
  • Cons: Tuning can be a bit rough with included piggyback systems, not as polished as FM or Edelbrock kits, intercooler piping can be tight in engine bay.

Ideal Build

Kraftwerks is a smart choice for builders who want a proven centrifugal solution without spending premium dollars. It suits street-driven cars with occasional track use and offers a clear upgrade path to higher horsepower.

Comparison: Power, Torque, and Character

To help you decide, here is a quick rundown of the typical power and torque outputs across these five brands (on a stock 1.8L NB Miata unless noted):

  • Jackson Racing M62: 190–210 whp, 170–185 lb-ft. Instant torque, flat curve.
  • Flyin' Miata Coldside: 195–215 whp, 165–180 lb-ft. Progressive pull to redline.
  • Edelbrock TVS (NC): 210–225 whp, 185–195 lb-ft. Strong midrange, smooth up top.
  • Vortech V3 Si: 200–225 whp, 160–175 lb-ft. Laggy low-end but explosive top-end.
  • Kraftwerks C30-94: 210–230 whp, 170–185 lb-ft. Similar to FM but slightly more aggressive tune.

All figures assume stock engine, proper tuning, and an intercooler. Higher boost levels require forged internals and standalone ECUs for reliability.

Factors to Consider When Choosing a Miata Supercharger

Budget

Supercharger kits range from $2,500 to $5,000+ for complete systems. Jackson Racing and Kraftwerks offer the best value for NA/NB owners, while Edelbrock and Flyin' Miata command a premium for their refinement and integration. Vortech kits are often priced in the middle but require more supporting mods.

Emissions Compliance

If you live in California or other strict emissions states, look for CARB EO numbers. Jackson Racing (M45 and some M62/TVS kits) and Edelbrock (NC, ND) have CARB-legal options. Flyin' Miata, Vortech, and Kraftwerks generally are not CARB-approved unless explicitly stated.

Miata Generation

NA/NB (1990–2005) have the widest aftermarket. NC (2006–2015) and ND (2016+) require modern kits. Edelbrock and Jackson Racing cover NC/ND; Flyin' Miata and Kraftwerks have kits for all generations; Vortech focuses on NA/NB/NC.

Power Goals

For 200–220 whp (safe on stock internals): any of the kits work. For 250+ whp, you need a larger head unit (Vortech YSi, Rotrex C38, or TVS1320 from TDR) and forged internals, along with a standalone ECU and upgraded fuel system.

Driving Style

If you want instant throttle response for autocross or tight roads, choose Jackson Racing or Edelbrock (Roots/TVS). If you enjoy revving and want a strong top-end for open roads or track, choose Flyin' Miata, Vortech, or Kraftwerks (centrifugal).

Installation Tips and Tuning Considerations

Installing a supercharger is a rewarding project, but it requires attention to detail. Here are some general pointers:

  • Cooling: Any forced induction system generates extra heat. Upgrade your radiator to a dual-core aluminum unit (e.g., Koyo, Mishimoto) and consider an oil cooler for track use.
  • Fuel System: Most kits include larger injectors and either a reflash, piggyback ECU, or standalone. For anything above 220 whp, a standalone ECU (e.g., Megasquirt, Haltech, MoTeC) is strongly recommended for precise tuning and safety.
  • Clutch: Stock clutch will slip above 180 whp. Plan to upgrade to a Stage 1 or Stage 2 clutch (like ACT or Exedy) at the same time as the supercharger install.
  • Exhaust: A free-flowing exhaust (header, midpipe, muffler) helps the supercharger breathe and can free up 5–10 whp. Stick to a 2.5-inch system for most applications.
  • Timing: Retard ignition timing if running high boost on stock compression. Many tunes handle this automatically.

Professional tuning is highly recommended even for “plug-and-play” kits, as every car is slightly different. Dyno tuning ensures safe air-fuel ratios and optimal ignition timing.

Conclusion: Which Supercharger Brand Is Right for You?

Selecting the best supercharger for your Miata ultimately depends on your budget, driving preferences, and the generation you own. If you want a proven, reliable, CARB-legal kit with instant response, Jackson Racing is hard to beat for NA/NB models, and Edelbrock offers the same qualities for NC/ND. For those chasing top-end power and a more aggressive driving experience, Flyin' Miata and Vortech deliver outstanding results with a centrifugal blower. And if you are building on a budget but still want a quality centrifugal system, Kraftwerks provides excellent value.

No matter which brand you choose, treat the installation as an opportunity to upgrade supporting systems—clutch, cooling, and engine management—to ensure your supercharged Miata is reliable and thrilling for years to come. For further reading, check out the Miata.net Garage for DIY guides, and visit each manufacturer’s website for the latest kit details and pricing.