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Dodge Challenger spied exercising supercharged Hellcat Hemi V8

One of the prime complaints against the Dodge Challenger is that, even in SRT8 guise, its 470 horsepower is responsible for hauling over 4,200 pounds of vehicle. For comparison, the 420 hp in the Ford Mustang GT only has to deal with 3,618 lbs. Things only get worse from there, as the higher-performance variants of both the Mustang and the Chevrolet Camaro are far more powerful than an SRT8 without adding on much heft.
So what is Chrysler to do? The correct answer is add a whole lot more grunt to its hefty two-door and even the odds. That's where the all-new Hellcat engine comes into play. We reported on this engine in May, and suggested that the Hellcat, a supercharged powerplant based on a 6.4-liter V8, would easily generate 500 to 570 hp and could likely arrive boasting more than 600 ponies.
Chrysler's ace in its sleeve has now been spied testing, with a number of Hellcat-equipped Challengers running the potent new engine both in more urbanized areas and under the sun of Death Valley. The hoods on these testers have been raised to accommodate the engine, and that camouflage over the fascias of these prototypes is there to hide a larger air intake. We also note what appears to be a new split grille under wraps. As for power output, our spies are now suggesting a Viper-equalling 640 hp from the Hellcat-equipped cars.

Somebody created a Dodge Challenger SRT Demon droptop

The Dodge Challenger SRT Demon is a vehicle built with one purpose in mind: going fast down a drag strip. Weight is the enemy when it comes to acceleration, and one surefire way to add weight to a car is to make it into a convertible. However, that’s exactly what one Demon owner decided to do to their Challenger. Motor Authority spotted this Plum Crazy Demon convertible conversion for sale online, and the dealer and builder even spilled a few details on the car itself. This particular conversion was done by Droptop Customs, a shop with experience, having previously converted a couple Challengers into convertibles for Shaq in Miami. However, ripping the roof off the 840-horsepower Demon is no small task. ThatÂ’s a ridiculous amount of horsepower to handle for a car that has lost a fair amount of structural rigidity from removing the roof. The Droptop Customs sales manager told MA about the changes that were made to make this build work. To begin, the frame rails were reinforced with 1x2-inch pieces of metal. Then, the shop added diagonally-mounted metal braces underneath to resist twist. Even more structural supports were added to the trunk, front and rear shock towers, and gussets were added to the bottom of each door to keep them from moving. Lastly, the shop boxed the connection of the front rails to the engine cradle. No specifics about weight gain were provided. There is one sad bit of news about this Demon, though. The dealer told MA that itÂ’s currently on consignment, despite being listed for sale on FCA dealership Cape CoralÂ’s website. ItÂ’s priced at an eye-watering $145,995. But the new owner wonÂ’t have to manually put down the top! ThatÂ’s right, itÂ’s powered, and itÂ’s supposed to take about 20 seconds to lower or raise into place while stationary. Somehow, the car has only 172 miles on it, so itÂ’s hardly been used. We have no photos with the top up, so youÂ’ll have to settle for top-down photos for now. It looks like a professional job through and through, and we actually dig the convertible look. Plus, who doesnÂ’t love Plum Crazy? 

2018 Dodge Demon comes with a factory tune for race gas

We knew the Dodge Demon was going to make a lot of power, but the ongoing question has been how much. We've seen estimates of between 757 and 1,121, but those have simply been guesses based on the numbers found in promo photos. However, if we had to put our bets on a horsepower rating, we'll probably go with the higher estimates because the Demon can run on race gas. Yes, the latest teaser for the Demon reveals that it will come with a factory tune optimized for race gas, which is rated at 100 octane or higher. Running such high octane, in combination with its heavy-duty intake cooling, means the Demon can handle absurd amounts of boost and advanced timing without running the risk of dangerous pre-ignition or detonation. Of course this also means the Demon should be capable of astonishing power with the high-octane calibration. The tune will be included in the Demon crate on a separate engine computer that the owner can swap out when he or she is ready to race. In addition to the computer, the center stack also has a button to activate the high-octane mode. A pair of fuel pumps and larger injectors also ensure the engine gets plenty of that sweet racing fuel. When not running the high-octane tune, the Demon runs on your average premium gasoline. Also, in case you accidentally run premium gas with the high-octane mode activated, the car will automatically switch to the default tune if engine knock is detected. You can get a peek at the system in the video above, and be on the lookout for a bonus video tomorrow. The full reveal will be next week on April 11 at the New York auto show. Related Video: