The Mazda RX-7 neighborhood is aware of its approach round an engine swap. For many years now, we’ve watched Wankel Rotary engines ripped from the fronts of those automobiles, changed by old-school small blocks or big-turbo 2JZs. Whereas there’s nothing fallacious plugging a well-proven engine rather than a finicky whirlygig, the staff at Gooichi Motors have simply modified the sport. The store stuffed a constructed Mercedes M120 V-12 engine into their lovely FD RX-7 for SEMA.
The Mercedes-Benz M120 V-12 engine debuted contained in the W140 S-Class again in 1991. The naturally-aspirated 6.0-liter engine offered 402 hp and 428 lb-ft of torque, although energy would dip to 389 hp for the 1993-1999 mannequin years. The engine additionally served because the constructing blocks of the M297 V-12, which powered the Mercedes-Benz CLK GTR within the FIA GT Championship throughout that period. That mentioned, the M120 is finest identified to lovers because of its function within the Pagani Zonda platform, the place it was utilized in 6.0, 7.0, and seven.3-liter displacements. With some assist from the Italians, the Mercedes-Benz V-12 sounds unbelievable when working at full tilt.
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Homeowners of M120-powered automobiles have turned to getting customized exhausts made to assist deliver a few of that aural character out of their luxurious autos, which is strictly how Gooichi Motors bought concerned with this engine to start with. A buyer got here to the store searching for customized header work, and so the staff bought an M120 out of a Miami junkyard to do some growth with. Because the staff tried to organize for SEMA Present 2022, the thought of stuffing that engine into their SEMA Present veteran RX-7 got here to the forefront. The automobile was already conversant in non-rotary energy, because it featured a turbocharged LS V-8 throughout its final journey to SEMA. Earlier than that V-8 was put in, the staff had really supposed to make the most of a V-10 sourced from a Dodge Viper.
Mating the M120 to the FD’s chassis pressured the staff at Gooichi Motors into tons of customized work. The entire engine equipment have been pieced collectively by the point, the mounts and wiring harness setup have been customized constructed. A dry-sump oiling system has been fitted to make the engine extra compact. The heads have been additionally ported, the valves being labored to realize a bit of additional efficiency. There are additionally some severely aggressive camshafts put in to emulate that Zonda character. You may additionally discover the speed stacks made out of Hayabusa throttle our bodies sitting atop the motor, which actually offers the engine a signature look. The engine itself runs on ethanol, however is predicted to make wherever between 850 and 1000 horsepower. It must also rev to 9000 RPM.
Different highlights embrace a six-speed sequential gearbox, Wilwood brakes entrance and rear, customized Fifteen52-inspired wheels, Proxes RR tires, and KW Variant 3 coilovers. A brand new widebody LTO package by Kyza supplies some visible aptitude. The staff didn’t get the automobile again from the physique store in time to get it working proper earlier than the SEMA Present, however they count on to have it hitting the road inside three months or so. We will’t wait to listen to how this factor sounds when it opens up in all of its naturally aspirated glory. The staff can be planning on placing a swap package collectively for numerous platforms, as a result of who amongst us does not want extra V-12s working round?