What lurks behind the rear axle of this Porsche 911 SC? As you may have expected, it's not an air-cooled flat-six, but it's not the small block GM mill you might have been thinking of, either. Maybe this car's owner wanted something a bit more serviceable and tunable than the stock flat-six, or maybe he really wanted to upset the local chapter of the Porsche Club of America.

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Whatever his motivations, Eric Plebani has dropped a turbocharged Mitsubishi 4G63 into the rear of his 1980 911 SC and tweaked it to produce about 650 hp. As he told Turbo Magazine, the swap wasn't as easy as just machining a few new brackets to mount the engine (it rarely is), but in this case, a new cooling system had to be built from the ground up. This meant lots of modifications to the front of the car to house a radiator where there once was none. It all came together rather nicely and resulted in the racy yet tidy front bumper, which is consistent with the very clean look overall.

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Whether you think it's brilliance or blasphemy, it's freaking fast. Plebani says it has done the quarter-mile in 11.4 seconds, and it also serves as his daily driver. Watch the video below to see it action, but be warned that it could hurt your brain to watch a 911 accelerate while hearing the sound of a turbocharged Japanese four-banger.

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Via Hooniverse

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