500+HP Hurricane I-6 Engine Coming 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 great transition in the coming decades. Some automakers have lineups that can adapt to the change with relative ease. But others, like Jeep, Chrysler and Dodge, have outdated combustion engines that needed updates yesterday, and can’t wait for the EV overhaul. That’s why Stellantis has thrown some money into an all-new 3.0-liter twin-turbo inline-six range of engines it calls the Hurricane.

Stellantis has pledged to make half of its vehicles battery-electric by 2030, but in 2019 the company also quickly realized it needed emergency solutions for the other 50 percent of its portfolio — and current ICE technology just wouldn’t make it. So a small team of engineers in Auburn Hills, Michigan went to work that year on an all-new, clean engine, and the Hurricane is the impressive result.

Do you rock like a…

The Hurricane will be a family of new twin-turbocharged, 3.0-liter I-6 engines, with production-ready standard output (“SO”) and high-output (“HO”) versions. In fact, the first production bike rolled off the line in November 2021 – something a leaked document gave us a taste of around that time, though at the time we thought it might be called the “Tornado” (a name that may still be used today). ).

The standard output Hurricane, Stellantis promises, will provide “more than 400 horsepower and more than 450 lb-ft of torque” at a maximum of 5,800 rpm. The high-power variant in their original configuration offers “more than 500 horsepower and more than 475 lb-ft of torque” at up to 6,100 rpm. Those are Hemi power figures, so fans of the current V-8 could start sweating. Especially given the availability to offer hybrid variants, which are planned, although the engine will not start 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 red line.

“As Stellantis aims to become the US leader in electrification, with a 50 percent electric vehicle (BEV) sales mix by 2030, combustion engines will play a key role in our portfolio in the coming years and we owe it to our customers.” .” and the environment to enable the cleanest, most efficient propulsion possible,” said Micky Bly, head of Propulsion Systems at Stellantis. “The Hurricane twin-turbo is a no-compromise engine that delivers better fuel economy and significant reductions in greenhouse gases without compromising our customers are asked to declare performance.”

efficiency

Stellantis designed the Hurricane engine family to meet all current North American emissions regulations, and furthermore future-proofed the line with provisions for stricter standards in the future. For example, business engineers say there is room for a diesel particulate filter, but it will not be fitted unless it is necessary.

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

Developmental background

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

The new Hurricane is all-new, but beyond the name, with Stellantis engineers using cutting-edge technology to achieve the engine’s ridiculous horsepower-per-litre figures in such a tight package. The block is lightweight cast aluminum, but plasma transfer wire arc (PTWA) technology was used to spray vaporized steel alloy onto each cylinder wall – something we’ve seen before on relatively exotic production engines like Ford’s departed Voodoo V-8.

The result is a strong coating with an almost perfect metal-to-metal bond, with 10 times the wear resistance of traditional coatings and also 50 percent thinner. Stellantis claims this also saves 3 pounds per engine compared to a traditional iron liner. Bly says the new spray liner still had a “mirror finish” after durability testing, unlike anything he’d seen before.

Hurricane Engine Details

The Hurricane is a DOHC design, with direct injection and individual cooling systems for the turbos, separate from the engine cooling circuit. There is a structural oil sump with a pump that can circulate oil during extreme driving conditions. As a unit, the SO weighs 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 key efficiency of the new Hurricane engine family, beyond the packaging, is the number of shared components between the standard and high-output variants, which share 96 common parts. However, the turbos are unique to each variant. The SO achieves a peak boost of 22 PSI and the HO 26 PSI.

The new engine is already production-ready, with test units already passing through the Saltillo North engine plant in Ramos Arizpe, Coahuila, Mexico, where the spray-bore technology is being implemented. The plant has the capacity to produce up to approximately 250,000 new Hurricane engines per year, with full production commencing in the coming months.

The HO variant requires premium gas and the SO variant runs on normal, but offers more power with premium fuel, which is recommended.

What Vehicles Will Power the Hurricane?

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

Leave a Comment