What if you could take a powerful but thirsty muscle car and significantly lower its tailpipe emissions--while adding even more power?

That could very well be the best of both worlds.

It turns out there is such a solution for green-minded street racers, but it comes with one serious drawback.

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The 2015 Dodge Challenger SRT Hellcat is already one of the most powerful cars currently in production, but one shop managed to extract even better performance--by converting one to run on E85 ethanol.

SeriousHP Horsepower Performance claims to have extracted 753 horsepower from a Hellcat using the corn-based fuel, backing it up with a YouTube video of the car on a dynamometer.

In stock form, the Hellcat's 6.2-liter supercharged Hemi V-8 produces 707 hp, but that's at the crank, without driveline losses factored in.

Impressively, SeriousHP says the 753 hp figure is for power at the wheels--the E85-burning Hellcat actually produces 886 hp at the crank.

In addition, the E85 car produces 670 pound-feet of torque, up from the stock version's 650 lb-ft.

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Besides the E85 conversion, the Challenger also received a new fuel pump, injectors, driveshaft, and ECU tune, which also helped improve performance.

That combination of copious horsepower and environmentally-friendly fuel sounds pretty good--but only if you can find a place to fill up with E85.

FlexFuel badge on E85-capable 2009 Chevrolet HHR

FlexFuel badge on E85-capable 2009 Chevrolet HHR

Only about 2 percent of fuel stations nationwide sell E85--which is a blend of 85 percent ethanol and 15 percent gasoline.

That's about 2,600 stations out of roughly 125,000.

Manufacturers do sell Flex-Fuel vehicles that can run on either E85 or gasoline, although most aren't as flashy as this converted Hellcat.

However, because of the lack of fueling stations--and general public disinterest in E85--the majority will likely never see a drop of ethanol in their tanks.

That doesn't matter to the carmakers, which receive extra Corporate Average Fuel Economy (CAFE) credits whether the Flex-Fuel vehicles they sell are actually run on E85 or not.

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