Hurricane disappointment - no Hurricane engine in the next three years

[Jakeyou]

Any idea what the Penastar upgrade is?

https://www.allpar.com/threads/psu-formerly-pug-— the-pentastar-v6-engine-upgrade.237300/

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[Uparms]

https://www.allpar.com/threads/psu-formerly-pug-— the-pentastar-v6-engine-upgrade.237300/

Great Job JakeYou..... that AllPar site has greater detail on the 3.6 upgrade. lots of pics and more verbiage then I included below.

"The Pentastar upgrade has finally arrived, though, for the moment, only for the Jeep Grand Cherokee. We had written, "We are expecting revised heads, direct injection, and better cam phasing, possibly affecting exhaust as well as intake, or altering the valve lift." In most areas, we were right - but it doesn't have direct injection, at least not yet. That might be awaiting cleaner gasoline.

The official name appears to be PSU, rather than the original PUG. It's possible that PUG is being reserved for a future upgrade. Typically, engine families go through numerous updates over their lives.

Torque is over 15% higher at engine speeds below 3,000 rpm, for better drivability; at the same time, gas mileage increased by over 6%. On the Grand Cherokee, horsepower rose by 5 hp to 295 hp.

The revised engine uses two-speed variable valve lift; the low-lift setting cuts "pumping work" at low speeds, for a fuel economy gain of up to 2.7%, while the high-lift setting preserves power. A torque-driven cam phasing valve timing system cuts oil demand, and increases the system range from 50° to 70°, cutting knock during hot starts and increasing the ability to use the stop-start system. Valve timing was recalibrated to take advantage of the new intake manifold".

 

[bd100]

do all 22's have the upgraded engine?

All 3.6L Gladiators have the upgraded engine, which is several years old now.

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