Good-Win Racing Mazda Performance Parts

KraftWerks Miata Supercharger Kit


Miata 1990-2005 · Forced Induction · Superchargers

Part Number: 61-1192

Application: 1990-1993

Reg. Price: $3995.00
Sale Price: $3,764.00


KraftWerks Miata Supercharger Kit
Good-Win Racing is proud to introduce the new completely redesigned '90-'93 KraftWerks Rotrex Miata INTERCOOLED Supercharger system.

Only configuration currently available is for Miata with BOTH A/C and Power Steering.

Like all KraftWerks supercharger kits, Miata systems are based off of the impressive Rotrex supercharger and include everything necessary for a truly bolt-on installation.

At the heart of each KraftWerks Miata kit is the Rotrex C30-74 centrifugal supercharger. The Rotrex patented traction drive technology works unlike any other supercharger, and means that power is always available, all the way to redline. The results are impressive: 170 hp and 125 lb-ft torque on 1.6L, 90- 93 models.

Good-Win Racing Application Notes: No other form of forced induction will come close to the smooth power delivery of a Rotrex based system. Below 4000RPM the power delivery is tame, but as the RPMs rise boost continues to build all the way to redline. More importantly, transient throttle response can be tuned to better than stock levels when combined with an aftermarket ECU. Please note each kit includes a rudimentary form of fuel control (fuel box) which, in some cases, can end up in competition with the factory computer causing driveability hiccups. Therefore, We only recommend purchasing this kit in conjunction with a standalone ECU such as our Megasquirt PNP2 systems. Not only will you be able to realize the full potential of this kit, but you also gain the ability to account for other component changes such as an aftermarket header.

Each Miata supercharger system is a comprehensive design and includes all necessary components to ensure safe, reliable operation. Standard-issue with each kit is a large and efficient front-mounted intercooler to help ensure low intake air temperatures for optimal performance. All necessary aluminum tubing, silicone couplers, and clamps are also included for easy installation. Proper air/fuel ratios are ensured with the included Grams Performance 310cc/min. fuel injectors, DeatschWerks 255 lph fuel pump, and boost-dependent fuel management unit. Convenient, plug-and-play fuel injector adapters are also included, making each kit a true bolt-on experience.

Rotrex superchargers are renowned for their compact size, high adiabatic efficiency, low vibration, and quiet operation. Their unique traction drive technology is what makes all of this possible, which, unlike other superchargers, transmits power through frictional forces between its rolling elements. Each Rotrex unit features its own self-contained oiling system that remains independent of the engine. Its dual-action oil pump supplies traction fluid to the supercharger while the supplied cooler ensures proper fluid temperatures at all times.

The KraftWerks Miata supercharger system provides instant throttle response and a progressive power curve that increases all the way to redline without the typical spiking or surging turbochargers are known for. This unique, more useable power curve results in reduced cylinder pressures, less strain on engine components, and increased reliability. Rotrex superchargers also operate much cooler when compared to turbochargers and other supercharger systems, which reduces the engine intake air temperature as well as the risk of detonation.

90- 93 kit: 170 hp / 125 lb-ft torque @ 8 psi
Rotrex C30-74 supercharger
High-flow front-mount intercooler (2.5 x 6 x 12 in.)
Grams Performance 310cc/min. fuel injectors
DeatschWerks 255 lph fuel pump
Plug-and-play fuel injector connectors
Boost-dependent fuel management unit
Recirculating bypass valve
Powder-coated aluminum intake and intercooler piping
High-quality CNC-machined brackets
Automatic belt tensioning system
High-quality fasteners, clamps, and hardware
Comprehensive installation manual
MAF relocation system
Reusable high-flow air filter
High-quality silicone hoses and adapters
Rotrex self-contained oiling system with oil cooler
Retain all factory accessories


First I want to again thank you for working with me on this muffler. I have almost 100 miles on it now, and it has a nice mellow sound. a little Bass, but not too much. A little louder than stock, but not too loud. Plus it is nice inside the car with the top up. I am happy so far I bought this one.

I belong to a local Miata club, and am very active with it. When Spring comes I will tell everyone how much I like the muffler, and how great you are to work with. Maybe I can get some extra business for you.

-- Bill

As you can see, i placed another order for more parts for my car. I wanted you to know that I'm pleased at how quickly the wheels/tires came, and the radiator too. Great service and response time.

-- Jeff D.