This Mazda RX-7 Has A Howling Six-Rotor Engine That Costs Over $70,000

How many rotors are too many? While most Mazda engine builders and tuners wouldn’t dare to build an engine with more than four rotors, a company out of New Zealand has built a six-rotor engine for the RX-7 and it is just as insane as you would imagine.

The six-rotor engine project was announced earlier this year and a local tuner by the name of Humpries Steel & Performance has already fitted one into a crazy RX-7 project car that earlier this year, made an appearance at New Zealand’s Rotary Reunion track event.

The engine developed by Pulse Performance is based on three 13B two-rotor engines and the engine build also includes a custom air intake and exhaust manifolds, new fuel pump, regulators, and injectors, a bespoke wiring harness, and a wet sump oil system. The complete package costs NZ$117,800, a touch over $71,000 in the U.S., an extraordinary sum of money for an engine. Pulse Performance does offer other rotary engine packages, including an NZ$68,000 (~$41,500) three-rotor unit and a NZ$96,000 (~$58,600) quad-rotor engine.

Watch: Street Cars Don’t Come Much Crazier Than This Four-Rotor Mazda RX-7

As you may imagine, the engine is big, measuring 1 meter long so it’s understandable why the entire chassis of this RX-7 is bespoke as are all the suspension components.

YouTuber misfire had the opportunity to check out the car in person and it seems like an absolute animal. The high-revving nature of the engine is otherworldly and it sounds more like a jet fighter taking off than a car.

Plenty of other upgrades have been made to the car. For example, the six-rotor engine is mated to an HGT Precision six-speed sequential transmission and it also features a beefy brake system sourced from Wilwood.

As a bonus, we’ve also included a second video of another wild RX-7, this time one residing in Europe. This RX-7 is rocking the stock two-rotor Wankel engine with a new aftermarket turbocharger that makes it good for 420 hp. In addition to being fast, it is so loud that it was banned from the Nurburgring after a couple of laps.