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John Hennessey's personal 2015 HPE700 Supercharged Ford Mustang GT hits 195 mph

Dressed in a coat of menacing black paint, the 2015 Hennessey Performance HPE700 Supercharged Ford Mustang GT definitely looks like one mean muscle machine. The 717-horsepower 'Stang proved that it can back up that aggressive appearance recently when company founder John Hennessey took his personal example to see just how fast it would go. The result down the 1.1-mile straight at the Continental Tires Proving Grounds in Uvalde, Texas, was over 195 miles per hour. The Mustang is nothing but a black blur and wall of supercharger wail as it buzzes by the camera at top speed. Despite the strong result, Hennessey doesn't seem done with the 'Stang yet. The car still seems to be pulling when it hits the rev limiter, and there's some straight track left ahead. After getting out, John Hennessey immediately says he thinks 200 mph is possible. The heart of the HPE700 is a 2.9-liter Roots-Type supercharger running at 7.25 psi. That's a pretty massive blower, especially when considering the 2.4-liter unit on the Hellcat V8. The engine also gets upgrades like improved injectors, a new fuel pump, stainless steel exhaust and recalibrated management. The company claims the upgraded Mustang can hit 60 in around 3.6 seconds and do the quarter-mile in 11.2 seconds at 131 mph. Prices for the package start at $59,500, but this one would would ring up for $65,874. Hennessey Performance is limiting production to 500 of them for the 2015 model year. 2015 HPE700 Supercharged Mustang Rockets to 195.2 mph John Hennessey takes his personal Mustang GT on a Texas road trip Uvalde, Texas-Everything is bigger in Texas, especially when it comes to automotive performance. Texas also lays claim to the highest posted speed limit in America at 85 mph. Enter the team from Hennessey Performance Engineering (HPE) who are located just west of Houston. John Hennessey and his merry band of performance car builders like to go fast, so much so that they have their own 1/4 mile dragstrip next to their workshop. Recently, the Hennessey team wanted to test their 717 horsepower HPE700 Supercharged Mustang development car (John's personal car and occasional daily driver) beyond the 130+ mph speeds that they have seen on the dragstrip. "Thankfully, we had recently received an invitation from the guys at the Continental Tires proving grounds in Uvalde to come over and do some testing on their 8.0 mile high speed oval", said Hennessey.

How did Ford keep the GT a secret before Detroit?

True secrecy is a rarity in the automotive industry. Sure, companies try to keep their future projects under wraps all of the time, but usually a spy shot or blurry development photo leaks out. The complete lack of any hard details before its unveiling likely helped make the Ford GT one of the biggest stars of the 2015 Detroit Auto Show. Not only was it the favorite of Autoblog's editors, but the supercar scored a prestigious EyesOn Design Award, too. Rumors about the vehicle had circulated for weeks before the show, but no one really knew much about the GT until it rolled onto the stage for Ford's press conference in Joe Louis Arena. Amazingly, the Blue Oval kept things mostly a secret during the car's 14- month gestation period prior to its debut. According to Automotive News, the GT project began in late 2013 by a skunk works team, including six designers, that guided the supercar along from birth until the unveiling. Ford kept things clandestine by locking the vehicle in a basement storage room, and only the group members got a key to the lock. Much of the development was also done at night to further keep the secret, but occasionally the prototype was hauled outside on weekends to check it out in natural light. Because of the speed in getting the development done and for even more stealth, the designers didn't get input from the Blue Oval's other styling teams around the world. But that was somewhat of a double-edged sword. "You don't actually get to bounce opinions off people," Ford design boss Moray Callum said to Automotive News. "We were on tenterhooks ourselves until the first people saw it." Even now, there are still mysteries surrounding the GT. There's still no official word on the supercar's power; just that it's over 600 horsepower. There are also the persistent rumors going back months that the Blue Oval plans to take the GT racing to celebrate the 50th anniversary of automaker's Le Mans victory. Although, maybe this time the secrecy wasn't so good because we might have got a glimpse of the racer, recently. Related Video:

Has the 2015 Ford Mustang gained hundreds of pounds?

Automakers face competing interests when it comes to developing a new generation of vehicle. On the one hand, companies want to build their cars to be safer and better handling, with more equipment and maybe even larger dimensions over the model it's replacing. On the other hand, they strive to keep weight down to the benefit of both performance and fuel consumption. Usually something has to give, and in the case of the new 2015 Ford Mustang, those efforts may have resulted in a weight penalty of two or three hundred pounds.
This according to Blue Oval modifier Steeda Autosports, which states that "the 2015 Mustang ended up gaining 200-300 pounds in this remake". Despite the Mustang not being on the market yet, it would appear the leading Ford aftermarketer has been given early access to the 2015 model to help jumpstart its tuning efforts (a rather common development among trusted tuners). If Steeda's assertion is accurate, that would make the challenge of getting the new pony car up to speed for both Ford and aftermarket customizers like Steeda that much greater.
We're waiting for official word from Ford on the veracity of Steeda's claim, but if true, it's bound to be a bit of disappointing news for legions of Blue Oval performance enthusiasts. Watch this space for more.