John_L wrote:Early versions (RX-2, RX-3, and RX-4) had problems with the oil seals, as well as not being very fuel-efficient for their size. Once Mazda dealt with the oil seal issue and repositioned the Wankel as a performance engine, they did pretty well.
I knew a guy who had an RX-7 back in the early 1980's - he claimed that the engine would rev to 14,000 rpm...
I used to race against RX-2's in my class, and they were unstoppable. With a relatively unmodified engine, they would pull and make power all the way to redline, which was an arbitrary limit since they would continue to make power until the engine exploded. They routinely ran them 12,000 RPM's. They only installed open exhaust systems and high-flow induction. They were the loudest cars on the track, but a healthy margin. My own Toyota 2T-C race engine, which had daytona-style exhaust, sounded like a street car by comparison.
Rick "performance engine indeed" Denney