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Hennessey’s 600-hp Lincoln Navigator is here

The tuners at Hennessey have begun deliveries of the 2018 Lincoln Navigator HPE600, a full-size SUV that boosts the Navigator's normal 450-horsepower output to 600 hp, announcing its arrival with a video showing the performance 'ute riding a dynamometer. Hennessey said it was a natural decision to turn to the Navigator because it has mostly the same 3.5-liter twin-turbo V6 engine as the F-150 Raptor, which it converted last year to the 602-hp 6x6 VelociRaptor. So it added engine management computer software upgrades, a stainless steel exhaust system, high-flow air induction and large front-mounted intercooler with blow-off valve. Dyno results in the video show the Navigator topping out at around 500 hp and 500 pound-feet of torque at around 3,800 rpm at the wheels; Hennessey says the 600 hp comes at 6000 rpm. The upgrades are good to take the nearly three-ton SUV from 0-60 mph in 4.8 seconds, about 0.7 seconds quicker than the standard Navigator, and run the quarter mile in 12.9 seconds at 107 mph. The tuning package will set you back $19,950, including installation. Additional options include 22-inch forged monoblock wheels, lowered suspension and Brembo brakes with six-piston calipers and 15.1-inch brake rotors. There are also HPE600 badges on the front door jambs and tailgate, and embroidered headrests. It comes with a three-year, 36,000-mile warranty. Just 200 are planned for the 2018 model. You can order it now through Hennessey or any authorized Hennessey Lincoln dealer. Related Video: Image Credit: Hennessey Lincoln SUV Luxury Performance Hennessey tuner lincoln navigator tuning

NHTSA upgrades Ford floor mat unintended acceleration probe

According to a Bloomberg report, the National Highway Traffic Safety Administration has upgraded an investigation into complaints of unintended acceleration lodged against Ford vehicles. The investigation began in June of 2010 when just three complaints had been received and it only concerned the Ford Fusion and Mercury Milan, but this was at a time when the phrase "unintended acceleration" made grown men go pale. With 49 additional complaints received since then, the investigation has been reclassified as an engineering analysis - the last phase before a recall - and it has been expanded to include the Lincoln MKZ, making for a total of "around 480,000" units affected between the three sedans from the 2008 to 2010 model years.
The ostensible cause is that floor mats are trapping the accelerator pedal, but according to a Ford statement at the time, the entrapment is due to owners placing the optional all-weather floor mats, or aftermarket floor mats, on top of the car's standard floor mats. NHTSA has backed up that assessment, pinning the blame on "unsecured or double stacked floor mats."
On the face of it, it would appear that NHTSA has upgraded the status not because of Ford's error, but owner error, and Ford has stated publicly that it is "disappointed" in NHTSA's move. On top of NHTSA still being skittish after that other unintended acceleration debacle, it could be seen to be taking its time investigating all of the variables: it's reported that Ford changed its accelerator pedal design in 2010, a "heel blocker" in the floorpan has been considered a potential culprit in how the floor mats could be trapping the pedal, some drivers have said the floor mats weren't anywhere near the pedal, and according to a report in the LA Times, in "a letter sent by Ford to NHTSA in August 2010, the automaker said it found three injuries and one fatality that 'may have resulted from the alleged defect.'"

Submit your questions for Autoblog Podcast #311 LIVE

We record Autoblog Podcast #311 tonight, and you can drop us your questions and comments regarding the rest of the week's news via our Q&A module below. Also for episode #311, Dan, Zach and Autoblog Editor-in-Chief John Neff chatted with Dan Greenawalt, Creative Director of Turn 10 Studios, about Forza Horizon. Subscribe to the Autoblog Podcast in iTunes if you haven't already done so, and if you want to take it all in live, tune in to our UStream (audio only) channel at 10:00 PM Eastern tonight.
Discussion Topics for Autoblog Podcast Episode #311
LA Auto Show recap