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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.

Chrysler almost smothered the Hellcat before it lived

Chrysler's 6.2-liter supercharged Hellcat V8 was an absolute sensation from the very moment it was announced, and honestly, how could it not have been? Packing 707 horsepower and 650 pound-feet of torque, its numbers immediately put every other production muscle car (and many supercars) to shame. Plus, we soon learned that would be wrapped in a package retailing for around $60,000 - a pittance compared to other vehicles offering similar grunt. However, the Hellcat almost never got the chance to rumble under the hood of the Challenger and Charger.
The Hellcat was initially proposed back in 2011, back when Fiat was deciding its future strategy for Chrysler Group, according to Automotive News. At the time, the company was just emerging from its bankruptcy doldrums, and an ultra-high-performance V8 wasn't exactly a must-have item. The program didn't move forward. However, SRT engineers kept fighting, according to AN, and four months later, they received the green light to pull the project off the shelf and continue developing the Hellcat. The muscle car world is certainly better for that decision.
The work of those engineers focused on taking Chrysler's standard 6.2-liter V8 and making it reliably handle all of the extra power from the supercharger. "It came down to micron levels of changes in the crank to be able to withstand the pressures of the engine," said Chris Cowland, director of advanced and SRT powertrain, to Automotive News. The changes amounted to switching out about 91 percent of the parts to make the Hellcat, including some quite minuscule alterations. For example, the washer holding the supercharger pulley is embedded with industrial diamonds to keep it from slipping.

Dodge Charger SRT Hellcat in the works

In Autoblog's recent First Drive of the 2015 Challenger SRT with the 707-horsepower Hellcat V8 we found its engine to be as brutally powerful as the numbers would suggest, even if it wasn't the best handler. However, the muscle-car-styling just isn't right for some buyers that need four doors and proper rear seats to haul around the family. It appears that Dodge has their backs, though, because the Hellcat is very likely on its way into the Charger in the near future. Imagine the looks on your passengers' faces when you stomp down on the throttle.
According to Road and Track, when Dodge submitted the Hellcat for engine power certification to the Society of Automotive Engineers, the company included the Charger on the paperwork. That showed that the automaker wanted the engine checked out for the sedan, too. R&T reckons the 707-hp Charger would hit the road about a year from now, clearing the Challenger for a year of exclusivity with the powerplant.
When the Charger SRT Hellcat does hit the road, it may carry a very special accolade. Assuming nothing beats it in the meantime, it might be the world's highest horsepower production sedan. Think on that for a second. Even a Mercedes S65 AMG only has 621 horsepower, though a good bit more torque at 738 pound-feet to the Dodge's 650 lb-ft. So while the beastly engine is getting put into other models, where else would you like to see it? The Ram? Grand Cherokee? Let us know in Comments.