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New Zealand’s Pulse Performance Race Engineering a great tinkerers of the Wankel rotary engine. The company developed a crazy six-rotor engine, a 39B if you will, and dropped in a RX-4. The engine was built by grafting six FC3S housing and a six pack of RX-8 spec rotors together. The tipping point of the project was the fabrication of an eccentric shaft to keep the rotating mass in sync and making power. The mighty mite motor belted out 813 horsepower.
“>See the RX-4 in action here.
Well the project caught the eye of Han Jiahao from Shanghai, China and Pulse Performance Race Engineering has developed the engine as a production unit, not just some crazy experiment. Mr. Jiahao purchased a Pulse Performance Race Engineering 6B six-rotor engine with sequential transmission to install in his Mazda RX-7.
The big difference between the first, development engine in the RX-4 and the production version heading into the RX-7 is the rotors. The development motor used RX-8 rotors which are higher in static compression compared to the 9.7:1 lower compression rotor housing used in the engine for the RX-7.
The videos show the engine idling and revving, installed in the RX-7 and making a pull on the dyno, and in motion honing around an open area.
See RX-7 engine start up video.
See RX-7 hooning in parking lot.
On the dyno the engine spun the rollers to the tune of 784 horsepower and 575 lb-ft of torque at only 9,000 rpm. It should be noted that the 6B is all motor there is no turbo at work here as evidenced by the open throttle bodies.
