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Here's what it'll take to build a Jeep Grand Cherokee Hellcat

Let's get one thing straight: We want a 707-horsepower Grand Cherokee Hellcat to happen. Badly. The latest report from Motor Authority is encouraging; the bonkers SUV supposedly has a codename, Project K, and has been given the green light for production. Fingers crossed. You might be wondering why the Trackhawk isn't already a thing. Hellcat engines exist, SRT Grand Cherokees exist, so just combine the two, right? It's not quite that easy. Here, we outline what needs to happen, why it should be the quickest Hellcat vehicle out there, and why it won't come anywhere near 200 miles per hour. How To Build A Hellcat Jeep The first engineering problem is feeding the air-intensive beast that is the 6.2-liter supercharged V8. The first engineering problem is feeding the air-intensive beast that is the 6.2-liter supercharged Hellcat V8. Breathing is important on two counts: pulling in enough air for the combustion to put out 707 hp, and then cooling the various heat exchangers once the engine is up to temperature. Dodge did it with the Charger and Challenger, it can do it with the Jeep. This is one place where the Grand Cherokee's larger frontal area might be a boon, as it gives the engineers more surfaces through which to suck air. Once you generate the 707 horsepower and 650 pound-feet of torque, it has to get to the wheels somehow. Jeep's current SRT all-wheel-drive system will at least need some beefing up to handle the torque. It could require a more complete re-engineering. We at least know the ZF-supplied eight-speed auto, used in the Dodge Hellcat models, is up to the task. The Hellcat engine should fit in the Grand Cherokee, as it's about the same size as the 6.4-liter currently in SRT Jeeps, but the Hellcat is taller because of its supercharger. The hood may need to be raised or at least resculpted for clearance, as well as to address those cooling needs. Quicker Than Everything, But Not Faster 200 mph? We're skeptical, from both a physics standpoint and a legal one. A reminder of the quick/fast distinction: quick is acceleration, fast is road speed. The Jeep's all-wheel drive will help put the Hellcat engine's power to the ground in a more manageable way than the Charger and Challenger do through just the rear wheels. That means better acceleration times than the Dodges (11.0 seconds in the quarter-mile for the Charger Hellcat, 11.2 for its Challenger sibling).

The fascinating history of the Popemobile

Pope Francis will be arriving today in the US for a variety of stops, including the World Meeting of Families in Philadelphia, PA. While here, the Pontiff won't be riding in the usual Mercedes-Benz Popemobile, but instead will make a more American switch to a modified Jeep Wrangler, according to the Washington Post. It'll feature a protected front, top, and rear, but the sides will be open for His Holiness to see the throngs of people gathering for him. For hundreds of years, Popes were transported in horse-drawn carriages or sometimes carried in an enclosed chair by footmen, but His Holiness finally traded for some real horsepower in 1929. While his ride sometimes varied depending on the country being visited, a Mercedes-Benz was generally the common choice. However, the Pontiffs have ridden in everything from a modified GMC Sierra to a Ferrari Mondial over the past few decades. Pope Francis has definitely preferred more plebeian transportation, though, including a Renault 4 running on biofuel. A trip to South Korea even put him in a Kia Soul, and he opted for an Isuzu D-Max in the Philippines. The Post's whole list is quite a fun read, and it's fascinating to see how the Popemobiles evolve over time. Related Video:

Star Trek actor's death may be linked to Jeep shifter issue

The tragic death of Anton Yelchin on Sunday may have resulted from a known design flaw with his Jeep Grand Cherokee. The 27-year-old actor, best known for playing Pavel Chekov in the latest Star Trek movies, was reportedly crushed when his vehicle rolled backwards down the driveway in front of his house, pinning him against a brick pillar and metal gate. The 2014-15 Grand Cherokee was one of three models (alongside the Dodge Charger and Chrysler 300 sedans) that Fiat Chrysler recalled this past April due to roll-away risk. The vehicle was equipped with an unintuitive "e-shifter" that didn't deliver the usual tactile response of being shifted into position, leading to numerous drivers exiting the vehicle mistakenly thinking that it was in Park. The problem was reported to have resulted in 41 injuries – and now possibly Yelchin's death as well. The manufacturer stated at the time of the recall that "the vehicles involved in these events were inspected and no evidence of equipment failure was found." It determined that while the vehicle warned occupants if the driver's-side door was opened while the engine was running and the transmission not in the Park position, such measures may have been insufficient. Its remedy for the problem involved updating the vehicle software to better warn drivers in such an event, and changing the design for subsequent models. "Regarding the recall," an FCA spokesman told Autoblog, "I can confirm notices were mailed to affected customers. Included in those notices were tip sheets describing proper operation of the shifter. This supplemental information echoes the instructions in the owner's manual." Yelchin was born March 11, 1989, in St. Petersburg, Russia. His parents were a figure-skating pair, and defected to the United States when Anton was just six months old. In the prime of his career, Yelchin had several films currently in development, including Star Trek Beyond, set to reach theaters next month. His body was reportedly discovered by friends when he didn't show up for rehearsal. Related Video: