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Message: <blockquote data-quote="sakuraguy" data-source="post: 1628172" data-attributes="member: 6441">13BThe 13B is the most widely-produced engine. It was the basis for all future Mazda Wankel engines, and was produced for almost 30 years. The 13B is no relation to the 13A. Instead, it is a lengthened version of the 12A, having 80 mm (3.1 in) thick rotors. It had the largest displacement yet at 654 cc, for a total of 1308 cc.In the United States, the 13B was available from 1974 through 1978 and was then retired until the 1984 RX-7 GSL-SE. It was retired again in 1996 with the cancellation of the RX-7. The engine was continually used in Japan from 1972's Mazda Luce/RX-4 through 2002's RX-7.APThe 13B was designed with both high performance and low emissions in mind. Early vehicles using this engine used the AP name, which signified these two characteristics.Applications:1972-1980 Mazda Cosmo AP 1974-1977 Mazda Rotary Pickup 1975-1977 Mazda Roadpacer 1974-1978 Mazda RX-4 1975-1980 RX-5 13B-RESIA tuned intake manifold was used in a Wankel engine for the first time with the 13B-RESI ("Rotary Engine Super Injection"). The so-called Dynamic Effect Intake featured a two-level intake box which derived a supercharger-like effect from the Helmholtz resonance of the opening and closing intake ports. The RESI engine also featured Bosch L-Jetronic fuel injection. Output was much improved at 135 hp (101 kW) and 133 ft·lbf (180 N·m).Applications:1984-1986 Mazda HB Luce 1984-1986 Mazda HB Cosmo 1984-1985 Mazda FB RX-7 GSL-SE 13B-DEILike the 12A-SPI, the second-generation RX-7 bowed with a variable-intake system. Dubbed DEI, the engine features both the 6PI and DEI systems, as well as four-injector electronic fuel injection. Total output is up to 146 hp (109 kW) at 6500 rpm and 138 ft·lbf (187 N·m) at 3500 rpm.Applications:1986-1988 Mazda RX-7, 146 hp (108 kW) 1989-1991 Mazda RX-7, 160 hp (119 kW) 13B-TurboThe 13B-DEI was turbocharged in 1987. It features the newer four-injector fuel injection of the 6PI engine, but lacks that engine's eponymous variable intake system. The twin-scroll turbocharger is fed with a two-stage valve to reduce turbo lag. Output is way up at 185 hp (138 kW) at 6500 rpm and 183 ft·lbf (248 N·m) at 3500 rpm.Applications:1986-1991 Mazda HC Luce Turbo-II, 185 hp (138 kW) 1987-1988 Mazda FC RX-7 Turbo-II, 185 hp (138 kW) 1989-1991 Mazda FC RX-7 Turbo-II, 200 hp (147 kW) 13B-REWA twin-turbocharged version of the 13B, the 13B-REW, became famous for its high output and low weight. The twin Hitachi HT-12 turbos were operated sequentially, with the primary providing boost until 4,500 RPM, and the secondary coming online afterwards. Output eventually reached, and may have exceeded, Japan's "maximum" of 280 hp (208 kW) for the final revision used in the series 8 Mazda RX-7.Applications:1990-1995 Eunos Cosmo, 235 hp (176 kW) 1992-1995 Mazda RX-7, 255 hp (190 kW) 1996-1998 Mazda RX-7, 265 hp (197 kW) 1999-2002 Mazda RX-7, 280 hp (208 kW)</blockquote>

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