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Thread: Mazda RX-7 (1st gen) SA 1978-1985

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    Mazda RX-7 (1st gen) SA 1978-1985

    The Mazda RX-7 is a sports car produced by the Japanese automaker Mazda from 1978 to 2002. The original RX-7 featured a 1,146 cc (69.9 cu in) twin-rotor Wankel rotary engine and a front-midship, rear-wheel drive layout. The RX-7 replaced the RX-3 (both were sold in Japan as the Savanna) and later replaced all other Mazda rotary-engine cars except the Cosmo.

    The original RX-7 was a sports car with pop-up headlamps. The compact and lightweight Wankel rotary engine is situated slightly behind the front axle, a configuration marketed by Mazda as "front mid-engine". It was offered as a two-seat coupé, with optional "occasional" rear seats in Japan, Australia, the United States, and other parts of the world. The rear seats were initially marketed as a dealer-installed option for the North American markets.

    The RX-7 made Car and Driver magazine's Ten Best list five times. 811,634 RX-7s were produced.

    First generation (SA22C)
    Series 1 (1978–1980) is commonly referred to as the "SA22C" from the first alphanumerics of the vehicle identification number. This series of RX-7 had exposed steel bumpers and a high-mounted indentation-located license plate, called by Werner Buhrer of Road & Track magazine a "Baroque depression." In Japan it was introduced in March 1978, replacing the Savanna RX-3. The lead designer at Mazda was Matasaburo Maeda, whose son Ikuo would go on to design the Mazda2 and Mazda RX-8.

    In May 1980, Mazda released 2,500 special North American models known as the LS (Leather Sport). This package was essentially an uprated GS model with added LS badges on each B-pillar, special striping, and LS-only gold anodized wheels (with polished outer face and wheel rim). All LS editions came equipped with special LS-only full brown leather upholstery, leather wrapped steering wheel, leather wrapped shift knob, removable sunroof, LS-specific four-speaker AM/FM stereo radio with power antenna (though listed as a six speaker stereo, as the two rear dual voice coil speakers were counted as four speakers in total), remote power door side mirrors, and other standard GS equipment. Two primary options were also available; a three-speed JATCO 3N71B automatic transmission and air conditioning. Other GS options such as cassette tape deck, splash guards, padded center console arm rest and others could be added by the dealer. The LS model was only ever available in three different exterior colors: Aurora White (1,000 made), Brilliant Black (1,000 made) and Solar Gold (500 made). Production estimates in parenthesis are widely accepted estimations per color, though no official production records are known to exist or to have been released, aside from the total combined production figure of 2,500 units.

    The Series 2 (1981–1983) had integrated plastic-covered bumpers, wide black rubber body side moldings, wraparound taillights and updated engine control components. The GSL package provided optional four-wheel disc brakes, front ventilated (Australian model) and clutch-type rear limited slip differential (LSD). Known as the "FB" in North America after the US Department of Transportation mandated 17 digit Vehicle Identification Number changeover. For various other markets worldwide, the 1981–1985 RX-7 retained the 'SA22C' VIN prefix. In the UK, the 1978–1980 series 1 cars carried the SA code on the vehicle VIN but all later cars (1981–1983 series 2 & 1984–1985 series 3) carried the FB code and these first generation RX7's are known as the "FB". The license-plate surround looks much like Buhrer's "Styling Impressions." In Europe, the FB was mainly noticed for having received a power increase from the 105 PS (77 kW) of the SA22; the 1981 RX-7 now had 115 PS (85 kW) on tap. European market cars also received four-wheel disc brakes as standard.

    The Series 3 (1984–1985) featured an updated lower front fascia. North American models received a different instrument cluster. GSL package was continued into this series, but Mazda introduced the GSL-SE sub-model. The GSL-SE had a fuel-injected 1.3 L 13B RE-EGI engine producing 135 hp (101 kW) and 135 lb·ft (183 N·m). GSL-SEs had much the same options as the GSL (clutch-type rear LSD and rear disc brakes), but the brake rotors were larger, allowing Mazda to use the more common lug nuts (versus bolts), and a new bolt pattern of 4x114.3 (4x4.5"). Also, they had upgraded suspension with stiffer springs and shocks. The external oil cooler was reintroduced, after being dropped in the 1983 model-year for the controversial "beehive" water-oil heat exchanger.

    The 1984 RX-7 GSL has an estimated 29 highway miles per gallon (8.11 litres per 100 km) /19 estimated city miles per gallon (12.37 l/100 km). According to Mazda, its rotary engine, licensed by NSU-Wankel allowed the RX-7 GSL to accelerate from 0 to 50 (80 km/h) in 6.3 seconds. Kelley Blue Book, in its January–February 1984 issue, noted that a 1981 RX-7 GSL retained 93.4% of its original sticker price.

    In 1985 Mazda released the RX7 Finale in Australia. This was the last of the series and brought out in limited numbers. The Finale featured power options and a brass plaque mentioning the number the car was as well as "Last of a legend" on the plaque. The finale had special stickers and a blacked out section between the window & rear hatch.

    The handling and acceleration of the car were noted to be of a high caliber for its day. This generation RX-7 had "live axle" 4-link rear suspension with Watt's linkage, a 50/50 weight ratio, and weighed under 2,500 lb (1,100 kg). It was the lightest generation of RX-7 ever produced. 12A-powered models accelerated from 0–60 mph in 9.2 s, and turned 0.779 g (7.64 m/s²) laterally on a skidpad. The 12A engine produced 100 hp (75 kW) at 6,000 rpm, allowing the car to reach speeds of over 120 miles per hour (190 km/h). Because of the smoothness inherent in the Wankel rotary engine, little vibration or harshness was experienced at high engine speeds, so a buzzer was fitted to the tachometer to warn the driver when the 7,000 rpm redline was approaching.

    The 12A engine has a long thin shaped combustion chamber, having a large surface area in relation to its volume. Therefore, combustion is cool, giving few oxides of nitrogen. However, the combustion is also incomplete, so there are large amounts of partly burned hydrocarbons and carbon monoxide. The exhaust is hot enough for combustion of these to continue into the exhaust. An engine driven pump supplies air into the exhaust to complete the burn of these chemicals. This is done in the "thermal reactor" chamber where the exhaust manifold would normally be on a conventional engine. Under certain conditions the pump injects air into the thermal reactor and at other times air is pumped through injectors into the exhaust ports. This fresh air is needed for more efficient and cleaner burning of the air/fuel mixture.[4]

    Options and models varied from country to country. The gauge layout and interior styling in the Series 3 was only changed for North American versions. Additionally, North America was the only market to have offered the first generation RX-7 with the fuel-injected 13B, model GSL-SE. Sales of the first generation RX-7 were strong, with a total of 474,565 first generation cars produced; 377,878 (nearly eighty percent) were sold in the United States alone. In 2004, Sports Car International named this car seventh on their list of Top Sports Cars of the 1970s. In 1983, the RX-7 would appear on Car and Driver magazine's Ten Best list for the first time in 20 years.

    Savanna RX-7 Turbo
    Following the introduction of the first turbocharged rotary engine in the Luce/Cosmo, a similar, also fuel injected and non-intercooled 12A turbo engine was made available for the top-end model of the series 3 in Japan. It was introduced in September 1983. Power is 165 PS (121 kW) JIS at 6,500 rpm. While the peak power figures were only somewhat higher than those of the engine used in the Luce/Cosmo, the new "Impact Turbo" was developed specifically to deal with the different exhaust gas characteristics of a rotary engine. Both rotor vanes of the turbine were remodelled and made smaller, and the turbine had a twenty percent higher speed than a turbo intended for a conventional engine. The Savanna Turbo was short-lived, as the next generation RX-7 was just around the corner.

    Source: Wikipedia
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    Mazda RX-7 (1st gen) SA 1978-1985 #2
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    Mazda RX-7 (1st gen) SA 1978-1985 #4
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    Last edited by Man of Steel; 03-05-2021 at 12:43 PM.

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    I don't know if he still has it or if I've got the wrong member, but I think cmcpokey has a 1st gen RX-7. I don't know if he still has it.

    It'd be fun to ask him to review that car for us.

  9. #9
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    He did/does have one. I wonder where he has wound up... Who has him on FB?

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    THE MAZDA RX-7: CELEBRATING AN ICON AT 40
    18/06/18 from Mazda


    • Produced across three generations from 1978 to 2002, the Mazda RX-7 celebrates its 40th birthday.
    • Over 800,000 examples of this ground-breaking rotary-powered sports car produced.
    • Successful in competition and loved by owners, the RX-7 established Mazda as a sports car brand.


    The year was 1978, UK inflation hit a six-year low, the Bee Gees dominated the charts, while flared trousers and bouffant hair was the height of fashion. It was also the year that Mazda unveiled the RX-7, a car that played a vital role in establishing Mazda’s reputation for building celebrated driver’s cars.

    In the 1970s car makers the world over found themselves faced with the grim reality of a global fuel crisis. Soaring petrol prices meant few drivers wanted to own big, gas-guzzling V8 sports cars, so a new approach was needed. Responding to the challenging environment, Mazda’s brightest brains set about creating a new kind of sports car - one that would be smaller, lighter, more efficient and – most important of all – fun to drive.

    So in the home market of Japan, Mazda revealed the ground-breaking RX-7. Its compact yet powerful rotary engine allowed the power unit to be mounted lower and further back resulting in a car that set new standards in road holding. The formula was a hit with customers and critics alike. Car and Driver magazine, one of America’s most influential car magazines, placed the Mazda RX-7 on its annual Ten Best list five times.

    The original RX-7 ‘FB’ proved a huge success. More than 470,000 driving enthusiasts bought one, before the second generation ‘FC’ model was introduced with turbo power in 1985. The third generation ‘FD’ followed in 1992 until production of the iconic RX-7 ended in 2002^.

    In addition, the RX-7’s success in competition around the globe further cemented its position as a one of the world’s best sports cars. The RX-7 took overall victory in the 1981 Spa 24 hours, competed at Le Mans, took part in the awe-inspiring world of Group B rallying and claimed the 1980 and 1981 BTCC titles. In the USA, the RX-7 took an unmatched 100 wins in 12 years of IMSA competition and won the GTU class at the 1979 Daytona 24 hours.

    Win Percy, the British racing driver who took both the RX-7s BTCC championships, was blown away by the speed of the Mazda RX-7, “I won the title in 1980 and team owner Tom Wilkinshaw said: ‘Let’s go for it and try to win races outright next year.’ We duly did, beating the Rovers and Capris and I took the title again. It was a very capable little car ‑ you really could call it a giant killer.”

    And Pierre Dieudonné who drove a Mazda RX-7 to victory in the 1981 24 Hours of Spa said, “That win was very important to Mazda. It was the first time a Japanese car manufacturer had won that race - the RX-7 didn’t have the image of something like a Porsche. But winning at Spa gave it the prestige.”

    To mark the 40th anniversary of the Mazda RX-7, Mazda brought together all three generations of the sports car in a film that documents the evolution of the most successful model to be powered by a rotary engine:

    [ame="https://www.youtube.com/watch?v=jaOtLK4hDF8"]Celebrating 40 Years of the Mazda RX-7 - YouTube[/ame]
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    Last edited by Duell; 06-21-2018 at 11:49 AM.

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    Last edited by Man of Steel; 03-04-2021 at 11:37 PM.

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