Its A Hurricane Of Horsepower! GME-T6 H.O. Will Make 507 Horsepower!

It didn’t take long for the Jeep® brand to take down an image and pricing of its upcoming twin-turbocharged 3.0-liter GME-T6 high-output (H.O.) inline-six-cylinder (codenamed “Hurricane”) engine off of its Build & Price configurator for the 2022 Jeep Grand Wagoneer (WS), soon after news broke of its posting. It marked the second time in three months, that the company has “accidentally” posted information surrounding the new motor on various Stellantis websites.

In December, Stellantis posted that production of the all-new 3.0-liter GME-T6 H.O. has begun on the “Plant Facts Sheets” for the Saltillo Engine Plant in Mexico. The plant currently also produced the popular lineup of GEN III HEMI engines for the current Chrysler Group portfolio of products. Just hours after the discovery, the post was altered and information regarding the all-new engine was taken down.

But early this morning, we were shocked to see that Stellantis has pulled back the curtain and unveiled some details about its new Hurricane GME-T6 lineup. That includes information for both the H.O. and standard-output (S.O.) variants.

The Hurricane features a cast aluminum block and cylinder head. Made from a dual overhead camshaft (DOHC) design, the Hurricane also has four valves per cylinder, has direct injection, and comes with variable intake and exhaust camshaft timing. The engine also consists of an aluminum oil pan, steel connecting rods, and a steel crankshaft. 

Each engine will come standard with Engine Start/Stop (ESS) technology.

Incoming air is cooled by an engine-mounted water/air intercooler before entering the intake manifold, making the air denser and helping to provide better performance. An electric pump is used to cool the turbochargers after the engine is shut off to help ensure durability.

The all-new inline-six-cylinder has the same bore and stroke (84 × 90 mm) and the same cylinder spacing as the current turbocharged 2.0-liter GME-T4 four-cylinder found on vehicles like the Jeep Cherokee, Jeep Grand Cherokee, Jeep Wrangler, Alfa Romeo Stelvio, and Alfa Romeo Giulia.

A new technology designed by Stellantis has been implemented on the Hurricane. It involves a low friction coating called Plasma Transfer Wire Arc (PTWA) technology, a process that allows the material to be sprayed at supersonic speed onto the cylinder walls to create a durable finish, which eliminates the need for cylinder liners in the aluminum block. Stellantis says it is up to 10-times more wear-resistant than a cast iron coating.

GME-T6 H.O. – 

Stellantis was quick to say that the H.O. will deliver more than 500 horsepower and 475 ft.-lb. (644 Nm) of torque depending on the application, it is fitted in. According to our sources, the H.O. will be tuned for 507 horsepower when it arrives for Grand Wagoneer duty. The H.O. features a redline of 6,100 rpm and is capable of providing 26 PSI of boost. Stellantis tells us that 90% of the H.O.’s peak torque will be delivered before 2,350 rpm.

Stellantis says that the H.O.’s two smaller turbochargers can spin faster and deliver boost faster, than if they equipped the Hurricane with a much larger, single-mounted turbocharger.

What makes the H.O. unique is that it will feature forged aluminum pistons with an anodized top ring, a diamond-like coating on the pins, and a 9.5:1 compression ratio. The H.O. does require premium fuel, just like our spy photos indicated earlier this month.

GME-T6 S.O. – 

The S.O. version of the Hurricane will deliver more than 400 horsepower and 450 lb.-ft. (610 Nm) of torque. This is done thanks to 22 PSI of boost. The S.O. differs from the H.O. by the use of diecast aluminum pistons with cast iron top rings, and a 10.4:1 compression ratio. The Hurricane S.O. will appear in the 2024 model year and unlike the H.O., premium fuel will only be recommended.

We expect that the S.O. will replace the 5.7-liter HEMI V8 in most applications when it debuts.

“As Stellantis aims to become the U.S. leader in electrification, with a 50% battery electric vehicle (BEV) sales mix by 2030, internal combustion engines (ICEs) will play a key role in our portfolio for years to come and we owe it to our customers and the environment to provide the cleanest, most-efficient propulsion possible,” stated Micky Bly, Stellantis Head of Propulsion Systems.

So what do you think of the new “Hurricane” GME-T6 engine? Let us know in the comments below or in the MoparInsiders.com forums.