Tuesday, August 10, 2010
mazda RX-7 FC AKA savanna
mazda RX-7 FC3S
he second generation RX-7 ("FC", VIN begins JM1FC3 or JMZFC1), still known as the Savanna RX-7 in Japan, featured a complete restyling reminiscent of the Porsche 944 or Porsche 924. Mazda's stylists, led by Chief Project Engineer Akio Uchiyama, focused on the Porsche 944 for their inspiration in designing the FC because the new car was being styled primarily for the American market, where the majority of first generation RX-7's had been sold. This strategy was chosen after Uchiyama and others on the design team spent time in the United States studying owners of earlier RX-7's and other sports cars popular in the American market. The Porsche 944 was selling particularly well at the time and provided clues as to what sports-car enthusiasts might find compelling in future RX-7 styling and equipment. While the SA22/FB was a purer sports car, the FC tended toward the softer sport-tourer trends of its day. Handling was much improved, with less of the oversteer tendencies of the FB. The rear end design was vastly improved from the FB's live rear axle to a more modern, Independent Rear Suspension (rear axle). Steering was more precise, with rack and pinion steering replacing the old recirculating ball steering of the FB. Disc brakes also became standard, with some models (S4: GXL, GTU, Turbo II, Convertible; S5: GXL, GTUs, Turbo, Convertible) offering four-piston front brakes. The rear seats were optional in some models of the FC RX-7, but are not commonly found in the American Market. Mazda also introduced Dynamic Tracking Suspension System (DTSS) in the 2nd generation RX-7. The revised independent rear suspension incorporated special toe control hubs which were capable of introducing a limited degree of passive rear steering under cornering loads. The DTSS worked by allowing a slight amount of toe-out under normal driving conditions but induced slight toe-in under heavier cornering loads at around 0.5 G's or more; toe-out in the rear allows for a more responsive rotation of the rear, but toe-in allowed for a more stable rear under heavier cornering. Mazda also introduced Auto Adjusting Suspension (AAS) in the 2nd generation RX-7. The system changed damping characteristics according to the road and driving conditions. The system compensated for camber changes and provided anti-dive and anti-squat effects. The Turbo 2 uses a turbo charger with a twin scroll design. Engineered to cancel the turbo lag at low engine speeds is the smaller primary chamber. At higher revolutions the secondary chamber is opened pumping out 33% more power then the naturally aspirated counterpart. The Turbo 2 also has an air to air intercooler that has its own intake on the hood.
Though about 80 lb (36 kg) heavier and more isolated than its predecessor, the FC continued to win accolades from the press. The FC RX-7 was Motor Trend's Import Car of the Year for 1986, and the Turbo II was on Car and Driver magazine's Ten Best list for a second time in 1987.
In the Japanese market, only the turbo engine was available; the naturally-aspirated version was allowed only as an export. This can be attributed to insurance companies penalizing turbo cars (thus restricting potential sales). This emphasis on containing horsepower and placating insurance companies to make RX-7's more affordable seems ironic in retrospect. Shortly after the discontinuance of the second generation RX-7's in 1992, an outright horsepower "arms race" broke out between sports car manufacturers, with higher and higher levels of power required to meet buyer demands. This rising horsepower phenomena arose from the US CAFE standards remaining stable while engine technologies marched forward rapidly.
Australian Motors Mazda released a limited run of 250 'Sports' model Series 4 RX-7's; each with no power steering, power windows or rear wiper as an attempt to reduce the weight of the car. In Japan, there was a special limited release of the FC called, Infini with only 600 made for each year. Some special noted features for all Infini series are: white infinity logo on the back, upgraded suspension, upgraded ECU, horsepower of 215, (although many dyno sheets prove it to be 225-230) lightened weight, BBS aluminum alloy wheels, Aero bumper kits, bronze colored window glass, floor bar on the passenger side, aluminum bonnet with scoop, and storage boxes. The car was thought as the pinnacle of the Rx-7 series, (until the FD came out) and came in the color dark green or brilliant black only. There are differing years for the Infini, which noted the series. There is not much information about the Series I or what year it was made. Series II was introduced in 1988, Series III was introduced in 1990, and Series IV was introduced in 1991. There are only minor differences between the series, the biggest change which was from the Series II being an S4 (1986-1988) and the Series III and IV being an S5 (1989-1991).