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Watch this 650-hp Hennessey Jeep Grand Cherokee go from 0-60 in 3.9 seconds

Hennessey Performance Engineering has created an HPE650 package for the Jeep Grand Cherokee SRT fitted with the 6.4-liter Hemi engine. When it leaves the showroom floor it has 470 horsepower and gets from 0-60 miles per hour in 4.8 seconds. When it leaves Hennessey's garage floor after the upgrade it has 650 horsepower - 530 hp at the wheels, according to Hennessey - and gets to 60 mph in 3.9 seconds on its way to running the quarter-mile in 12.6 seconds.
There's more than just a Roots-type supercharger bolt-on, with ported cylinder heads and high-flow headers among the many changes made to the engine. You can watch this pre-2014 facelift silver model prove its spec sheet on the drag strip in the video below.

NHTSA closes investigation into Jeep Liberty fires

The investigation that the National Highway Traffic Safety Administration opened into the Jeep Liberty in October 2013 has been closed. NHTSA received two (!) complaints about fires starting in the driver's door, thought to be caused by the master power window switch. The initial estimate was that 80,000 Libertys could be roped into a possible recall, but according to a report in the Detroit News the agency examined records for 425,000 Chrysler products that used the same window switch, including the Dodge Nitro and Chrysler Town & Country minivan.
After canvassing 265 warranty claims related to the master switches, NHTSA concluded that the rate of fires compared to the "large population of vehicles" was rather low, and that there was no trend pattern behind the few issues it did find. Perhaps with that, and the closure of the trailer hitch investigation, the Liberty can finally rest in peace.

Autoblog Minute: FCA issues Uconnect software update amid hacking fears

Carjacking has gone wireless, as automakers and Congress scramble for a solution after a disturbing video on Wired showed a pair of researchers controlling a Jeep Cherokee remotely. Autoblog's Adam Morath and David Gluckman report on this edition of Autoblog Minute. Show full video transcript text [00:00:00] Carjacking has gone wireless, as automakers and Congress scramble for a solution. I'm Adam Morath and this is your Autoblog Minute. Cars with wireless connections are susceptible to remote hacking, as demonstrated in a disturbing video on Wired.com. The segment showed two researchers remotely controlling a Jeep Cherokee, including running vehicle's the wipers, turning up the music, and ultimately shutting down [00:00:30] the Jeep while it was being driven on the highway by Wired senior writer Andy Greenberg. Washington took note. A press release issued from the desks of senators Ed Markey and Richard Blumenthal introduces legislation protecting drivers from auto security privacy risks. Fiat Chrysler, parent company of Jeep, has a solution for its customers. For more we go to Autoblog's David Gluckman. [GLUCKMAN INTERVIEW] Chrysler has worked with the Uconnect cellular provider Sprint to plug security holes on the carrier side. The vehicles themselves can't be updated wirelessly, so [00:01:00] the remaining changes require physical access. For that, customers have three options: One, download the Uconnect software update to a USB stick and install. Two, wait for FCA to send a USB stick with the latest software that they can install, or third, visit a dealer. Owners should do what they're most comfortable with. I made a video that walks through the whole process from download to install and it took about a half hour. [MORATH] David's full video tutorial of how to install the Uconnect fix can be seen on Autoblog. [00:01:30] It remains to be seen how the rest of the auto industry will respond to these security risks. For Autoblog, I'm Adam Morath. Related Video: Autoblog Minute is a short-form news video series reporting on all things automotive. Each segment offers a quick and clear picture of what's happening in the automotive industry from the perspective of Autoblog's expert editorial staff, auto executives, and industry professionals.