Rob Dahm's Turbocharged Three-Rotor RX-7 Is An 835bhp Dyno Monster

Entrepreneur and serial rotary enthusiast Rob Dahm is back on our screens with his totally reworked three-rotor RX-7. Brace yourself for noises so good you might need to cross your legs: eight years after the engine was originally put together, the car known as 20b is back for its latest and greatest dyno run.

Make that 42 dyno runs, to be precise. New wiring, new coils, a new ECU and new injectors in the eight-year-old engine kick proceedings off with a 618bhp pass, but the fuel pressure is found to be low. As the video runs through, the power rises, tweaks are fixes are applied, the car seems to set itself on fire a couple of times and there’s a whole heap of fantastic rotary ear-nectar.

Ultimately Dahm and the dyno team fill 20b with racing fuel and, on the 42nd pull of the night it recorded a staggering – and pretty damn violent-looking – 835bhp at about 7300rpm, along with 620lb ft of torque.

Just a week or so ago, Dahm posted a video (above) of the car firing up for the first time. He’s got to be pleased with the results so far. Now, if he can just stop it trying to set fire to itself…