500+ HP Hurricane I-6 engine comes to Jeep, Ram, Dodge

With all the focus on the future of electric vehicles, there is less attention given to what companies plan to offer in the meantime during the major restructuring in the coming decades. Some car manufacturers have team lineups that can easily adapt to the change, relatively speaking. But others, such as Jeep, Chrysler and Dodge, have aging internal combustion engines that need updates yesterday and can not wait for the EV review. That’s why Stellantis has thrown some money at a brand new 3.0-liter twin-turbo inline-six engine family that it calls the Hurricane.

Stellantis is committed to manufacturing half of its vehicles battery-electric by 2030, but as early as 2019, the company also quickly realized that it would need stop solutions for the other 50 percent of its portfolio – and its current ICE technology would simply not reduce it. So a small team of engineers in Auburn Hills, Michigan, started working that year on a brand new, clean engine, and the hurricane is the impressive result.

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Hurricane will be a family of new twin-turbo, 3.0-liter I-6 engines, with standard power (“SO”) and high power (“HO”) versions ready to begin production. In fact, the first production engine rolled off the line in November 2021 – something that a leaked document gave us a preview of around that time, although at the time we thought it could be called “Tornadon” (a name that may still be used eventually ).

The standard Hurricane power, Stellantis promises, will offer “more than 400 horsepower and more than 450 lb-ft of torque,” at a maximum of 5,800 rpm. The high-power variant will offer “more than 500 hp and more than 475 lb-ft of torque” at up to 6,100 rpm in its initial configurations. These are Hemi power figures, so fans of the current V-8 can start sweating. Especially when considering the possibility of offering hybrid variants, which are planned, even if the engine will not be launched with a hybrid configuration. Engineers say the new engines maintain at least 90 percent of peak torque from 2,350 rpm all the way to the redline.

“As Stellantis aims to become the US leader in electrification, with a sales mix of 50 percent of battery-powered electric vehicles (BEV) by 2030, internal combustion engines will play a key role in our portfolio for many years to come and we owe it to our customers and the environment to provide the cleanest, most efficient propulsion possible, “said Micky Bly, Stellantis Head of Propulsion Systems. “Hurricane twin-turbo is an uncompromising engine that provides better fuel economy and a significant reduction in greenhouse gases without asking our customers to give up performance.”

Efficiencies

Stellantis designed the Hurricane engine family to meet all current North American emissions requirements and also secured the line with regulations for stricter standards in the future. For example, the company’s engineers say there is room for a particulate filter, but it will not be equipped unless required.

North America will be the primary market for the engine, with some exports to other global markets in specific model series. Stellantis claims that SO emits 15 percent less CO2 than engines with a larger displacement within the company’s portfolio, and HO produces 13 percent less. The new engines will help the company’s brands stay on target for their Carbon Net Zero by 2038 initiative.

Development background

If the Hurricane name in this context seems familiar to you, the engineers admit that they were more than a little inspired by the old Willys “Hurricane” I-4 engine that was well done in CJ-3, -5 and -6. , claimed that its specific power of 30 hp per liter was “game-changing” at the time. That said, 30 hp per liter can not put a light on the new Hurricanes 133+ hp per liter – and that’s just the SO version.

The new Hurricane is brand new but beyond the name, with Stellantis engineers using cutting-edge technology to achieve the engine’s ridiculous horsepower-per-liter figures in such a tight package. The block is lightly cast aluminum, but plasma transfer wire arc (PTWA) technology was used to spray evaporated steel alloy on each cylinder wall – something we have previously seen on relatively exotic production engines such as Ford’s expensive Voodoo V-8.

The result is a strong coating with an almost perfect metal-on-metal bond, with 10 times as much wear resistance as traditional coatings that are also 50 percent thinner. Stellantis claims that this also saves £ 3 per engine block compared to a traditional iron lining. Bly says that the new spray liner still had a “mirror finish” after durability testing, like nothing he has ever seen before.

Hurricane Engine Details

Hurricane is a DOHC design, with direct injection and individual cooling systems for turbos, separate from the engine cooling circuit. There is a structural oil pan with a pump that can circulate oil under extreme driving conditions. As a unit, the SO weighs in at 430 pounds, and the HO comes in at 441 pounds, both fully clothed – lighter than the company’s 5.7-liter Hemi V-8.

Another important efficiency in the new Hurricane engine family, in addition to its packaging, is the number of shared components between the standard and high-power variants, which share 96 common parts. However, the turbocharger is unique for each variant. SO achieves a peak increase of 22 PSI and HO 26 PSI.

The new engine is already ready for production, with test units already running through the Saltillo North engine factory in Ramos Arizpe, Coahuila, Mexico, where the spray-drill technology is implemented. The factory has the capacity to produce up to approximately 250,000 new Hurricane engines per year, with full production starting in the next few months.

The HO variant will require premium gas, and the SO variant will run on normal, but offer more power with premium fuel, which is recommended.

What vehicles will the hurricane drive?

No specific vehicles were announced during a Stellantis presentation of the new engines, with individual brand announcements that will be made about vehicles with the new Hurricane engine coming soon. We know that the company’s new vehicle platforms STLA Large and STLA Frame, which will sit under future vehicles in the D-segment and pickups, respectively, have been confirmed to use the Hurricane engine family. That probably means Ram trucks and Dodge and Jeep SUVs, so we’ll see. SUVs and crossovers are the hot product these days, and certainly an important (and profitable) part of the future Stellantis product mix, so it’s no surprise that this brand new engine line should find a home in these products.

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