When Dodge released the new 2018 Challenger SRT Demon, we knew it was going to be wicked fast. From the get-go, the message behind the Demon was clear; to build a car unlike anything ever offered off a production line before and make it ridiculously fast and make it street legal.

Under the hood of the Demon sits a bright red, supercharged 6.2L Demon HEMI. The supercharger on top is similar to the one you’d find on the Hellcat but it’s been increased to 2.7L, which bumps up boost pressure to 14.5 psi from 11.6 on the Hellcat. For the Demon, the engine got a complete overhaul with 25 major component upgrades from the Hellcat engine, including the previously mentioned supercharger, strengthened pistons and rods, valve train, lubrication system and fuel injection system. These upgrades also allowed the engineers to bump the rpm limit from 6,200 to 6,500 rpm respectively.

“With the Demon, our goal was to build a car that would tattoo the Dodge logo into the subconscious of the general market, beyond even our loyal enthusiasts. To do so, we had to set records that have never been set before, do more than has ever been done before, and go beyond even the legendary Hellcat. The result: an 840-horsepower, 9-second muscle car unlike anything that has ever come before it”, says Tim Kuniskis, Head of Passenger Cars – Dodge, SRT, Chrysler and Fiat, FCA North America.

From the factory, the Demon is configured for 91-octane premium unleaded pump gasoline. However, if you switch to 100-octane, it gives you the full performance that the car is capable of. Like to the Hellcat, the Demon comes with two key fobs. The black fob limits engine output to 500 horsepower. The red key fob unlocks the engine’s full output of 808 horsepower and 717 ft. lbs. of torque using the 91 octane. The use of 100-octane with the optional Direct Connection powertrain controller boosts engine output to 840 horsepower at 6,300 rpm and 770 ft. lbs of torque at 4,500 rpm.

While horsepower numbers on paper are fine and dandy; many have been curious what the Demons really put out. Since Demons are finally trickling out to the public, we knew it wouldn’t be long before someone put one on a dyno; and we were right. B&G Chrysler Specialists, Inc out of Collinsville, Virginia just picked up a “shop Demon” for the company. Since B&G specializes in tuning modern Mopars, we knew they couldn’t wait to put it on their dyno. Well, the numbers are in. Using the Demon’s Pump Gas ECU, the car produced RWHP numbers of 724 RWHP @ 6,150 rpm and 681 ft-lbs of torque at 4,350 rpm! Quite impressive. We are looking forward to seeing what B&G have up their sleeves in the near future for their Demon.