The intake cam was changed to a solid lifter design with a stronger cam the intake runners in the head were straightened and the intake manifold was mounted higher up. The engine compression ratio was raised from 9.0:1 to 9.5:1 by adding slightly domed pistons. The BP-4W engine remained at 1.8 L (110 cu in) but received several minor updates. The NB continued to employ four-wheel independent suspension, with enlarged anti-roll bars at the front and rear, but the wheels, tires and brakes were significantly upgraded: anti-lock braking system was offered as an option alloy wheels were now 14' (360 mm) or 15' (380 mm) in diameter and 6' (150 mm) in width, depending on the trim package sports models were equipped with the larger wheels and 195/50VR15 tires. Other notable improvements include a glass rear window with defogger for the convertible top and an optional hinged wind deflector behind the seats. The new car grew slightly in width compared to the earlier model and was slightly more aerodynamic than the original, with a drag coefficient of C d=0.36. Prices in the United States, the main market for the MX-5, started at US$19,770.Īlthough many parts of the interior and body were different, the most notable changes were the headlamps: the first generation's retractable headlamps no longer passed pedestrian safety tests and were replaced by fixed ones. The NB featured a more powerful engine and external styling cues borrowed from the third generation Mazda RX-7, designed in 1995 by Tom Matano.

In February 1998, Mazda released the second-generation MX-5, production code NB, for the 1999 model year, the 1998 model year was skipped. The redesigned MX-5 was previewed at the Tokyo Motor Show in October 1997. Overview Pre–facelift Mazda MX-5 (NB) convertible (North America)

The NB is also the only generation to feature a factory-built turbocharged variant in the form of the Mazdaspeed MX-5. The model continued the MX-5's philosophy of being a lightweight, front mid-engine, rear-wheel-drive roadster while featuring numerous performance improvements, however lacking its predecessor's retractable headlamps. The Mazda MX-5 (NB) is the second generation of the Mazda MX-5 manufactured from 1998 until 2005.

1.8 L (110 cu in) turbocharged BPT I4 (Mazdaspeed)

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