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500+ hp Stellantis 'Hurricane' I6 previews a world without Hemis

After years of rumored development, Stellantis has revealed its new six-cylinder engine family. The 3.0-liter, twin-turbocharged "Hurricane" I6 will offer V8 power, forced induction torque and six-cylinder efficiency in a package designed to fit into any of the company's North American rear-wheel-drive platforms.  What is "V8 power," exactly? Well, in standard output guise, the new I6 cranks out more than 400 horsepower (the specific figure will vary by application) and 450 pound-feet of torque, while the high-output variant is good for more than 500 horses and 475 lb-ft. The final figures will be dependent on the application. We'll save you a little legwork: In current Ram, Jeep and Dodge products, the 5.7-liter Hemi tops out at about 395 hp and 410 lb-ft, give or take, and the 6.4-liter around 485 hp and 475 lb-ft.    This is a clean-sheet design that is only related to the company's turbocharged four-cylinder by some common measurements. The I6 is exclusively direct-injection (no hybrid/port-injection here) and the two I6 variants share 96 common parts, including the block and oil pan design. The differences are found in their internals, intake plumbing, valvetrain components and the turbochargers themselves. Stellantis is not yet ready to share specs or supplier info for the turbos but says announcements will come from its partners soon.  The standard-output I6 has a compression ratio of 10.4:1 and revs to 5,800 rpm. It will run on regular fuel, albeit with reduced performance; 91 octane is recommended for maximum output. The high-output variant has a compression ratio of 9.4:1 and will rev to 6,100 rpm. That one will require premium. The new I6's advantages go beyond basic power output. Every Hemi family engine currently in production is based on an iron block design, so they're heavy. The aluminum-block I6 shaves weight off the total engine package, even if some of that gets added back thanks to the turbos and their associated plumbing. The standard-output I6 weighs 430 pounds, Stellantis engineers told us; the high-output adds just another 11. Fully dressed 5.7-liter V8s are in the 550-560-pound ballpark, and 6.4-liters close in on 600 pounds.  You may be wondering, "Why a clean-sheet gasoline engine now, when the industry is moving toward battery-electrics?" A valid inquiry, and one Stellantis was prepared to address. While the company will be pivoting to electrification over the next decade, it won't be instantaneous.

The Dodge Demon gets a Drag Mode and a lesson in Newtonian physics

It's Thursday morning, which means we have more news on the upcoming Dodge Demon, the pumped-up Challenger Hellcat variant that's looking to cause mayhem at a drag strip near you. This week's video, "Third Law," shows the Demon's revised suspension in action and displays another one of SRT's cryptic messages. Dodge claims that the 6.2-liter supercharged Hemi V8 in the Hellcat twins is compromised because it's fitted to a car that needs to be comfortable on the street in addition to a performer on the drag strip. Not so with the Demon, as Dodge says the car is "designed to be highly competent in all drive modes and configurations," including the all-new Drag Mode. Dodge says details about the new mode will trickle out over the next few weeks, but all the info this week focused on suspension. The "Third Law" in this week's title refers to Isaac Newton and motion: "When one body exerts a force on a second body, the second body simultaneously exerts a force equal in magnitude and opposite in direction on the first body." We're not sure what Newton would have thought seeing the sidewall wrinkling Nitto NT05R drag radials in action, but he'd probably have a reaction of some sort himself. An ideal suspension setup for the drag strip makes for a poor setup on the road. As Dodge puts it, the "old school" way to set up a drag car was to "get the quickest reacting springs upfront, the softest rebound front shocks that wouldn't restrict the springs' reaction, remove any restrictions (sway bar) and increase the compression of the rear shocks." This would give a car great front to rear weight transfer but made for very poor lateral direction control, meaning minor corrections were difficult. The Demon's Drag Mode will use electronics to give the car the best combination of launch and lateral stability. Dodge listed some of the parts to help aid in this goal. They also gave us a few equations that we can't make sense of. Let us know if you have any clues. Hardware: 35 percent lower rate front springs/28 percent lower rate rear springs 75 percent lower rate hollow front sway bar/44 percent lower rate rear sway bar Drag-tuned Bilstein Adaptive Damping Shocks Software: Rear = F/F and Front = F/S F/F – F/S maintained @ wide open throttle (WOT) F/F – F/F < WOT Traction control disabled/ESC maintained Result: 13.5=575@500 Related Video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.

We're pretty sure the Challenger SRT Demon won't have 1,121 horsepower, but what if?

Dodge's slow rollout of the upcoming Demon continues, and with it comes endless speculation about what it all means. Every video, every image, and every press release contains some clue that points towards the Demon's final specs. We don't think any of it is random or arbitrary. This week cryptic image, a small plate with a name and two numbers, shows us a little more than last week's license plate. Unfortunately, Dodge will neither confirm or deny anything, meaning we have no way of knowing which rabbit hole to go down. Don't expect to see official horsepower, a quarter-mile time, or an MSRP until the New York Auto Show. The plate is attached to the crate of goodies that comes along with every Dodge Demon. This particular one is labeled with three things: Tom Coddington, serial number 0757, and VIN 001121. The name is simple enough. According to Hot Rod, Coddington was one of the original Ramchargers, a group of engineers in the early 1960s that helped Dodge get involved in drag racing. He was a fuel system specialist, motor consultant, and a rotating garage manager. All of that could be clues. While a name is easy enough to Google, the two numbers can't be broken down so easily. The crazier theory is that the car makes 1,121 horsepower and will do the quarter-mile in 7.57 seconds. Frankly, those numbers are about as likely as the Demon actually being powered by a Rolls-Royce turbofan engine from a Boeing 757 or packing a carburetor with 1,121 CFM. The Demon is going to be street legal, and the costs associated with making a 1,121-hp car meet emissions standards alone are assuredly astronomical. As our friends from Road & Track pointed out, the more likely theory is that 757 is actually the horsepower rating. This seems totally plausible, but it means we still don't know what 1,121 means. Surely it's not a drag strip time, as the standard Hellcat will do 1/4 mile in 11.2 seconds. Like before, if you have any ideas, post them in the comments. Until April, we'll keep trying to solve Dodge's demonic puzzle. Related Video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. News Source: Road & Track, Hot RodImage Credit: FCA New York Auto Show Dodge Coupe Performance dodge demon dodge hellcat