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Hot lapping Detroit's Belle Isle in a McLaren 12C GT3

Last weekend's Indianapolis 500 was indeed the most prominent race of the 2014 IndyCar series so far, with driver Ryan Hunter-Reay winning in what was an incredibly close fight to the very last lap. But the Indy 500 doesn't mark the end of the IndyCar season, and this weekend, the series heads to Detroit for the Belle Isle Grand Prix – an event that brought open-wheel racing back to The D in 2012 (to admittedly terrible results). But this weekend's Belle Isle events aren't just about IndyCar. In fact, there's a whole host of racing to be found on the small island in the Detroit River this weekend, including the Pirelli World Challenge competition, which many folks love, if only because the racecars are actually based off of production vehicles. As part of this week's pre-race festivities, Autoblog multimedia director Adam Morath got to meet with the folks from K-Pax Racing and check out their McLaren 12C GT3 racer. Morath got strapped in and was told to hang on to his five-point for a memorable hot lap of Belle Isle in the 12C GT3, and he captured the experience on video. Scroll down to check it out. Motorsports McLaren Coupe Racing Vehicles Performance Videos detroit grand prix

Honda revamps F1 engine for McLaren

Things haven't been going smoothly for Honda since returning to Formula One, and the Japanese automaker says the challenge has been greater than it anticipated. But after a stronger showing at the recent Hungarian Grand Prix, Honda says its reliability issues are behind it and is working on introducing a revamped engine for the second half of the season. "I am confident our reliability problems are now behind us, which means we can turn our attention to increasing power," Honda racing chief Yasuhisa Arai told Autosport. "After the summer shutdown our plan is to apply a new-spec engine using some of our remaining seven tokens." The "tokens" to which Arai refers are a way for the FIA to limit engine development. The power units are broken down into 66 such tokens in the regulations, and each engine supplier can change up to 32 of them throughout the season. The allowance was at first afforded only to returning suppliers Mercedes, Ferrari, and Renault, but Honda succeeded in convincing the FIA to allow it the same leeway. Honda has been spending its development tokens on fixing reliability issues, but will shift its focus to improving performance. The McLaren team that Honda powers has only gotten both of its cars to the finish line at two out of 10 races this season. Most of those problems came down to the new engine package. That's compared to only two retirements the team suffered last season, when it was still under Mercedes power, and none the year before. In Hungary, however, the team not only got both cars to the finish line, but placed both in the points for the first time this season. "The sport has changed immensely since the McLaren-Honda 'glory days'," said Arai. "The current technology is much more sophisticated, and it is tough to make a good racing car. We knew it wouldn't be easy, but perhaps we didn't imagine it would be this hard." The Japanese manufacturer is now spending the summer break developing its power unit. Many of those changes are expected to be rolled out in time for the Belgian Grand Prix later this month, with the rest to follow in the ensuing races. Beyond reliability, engine performance is particularly important for the high-speed races at Spa and Monza, where the subsequent Italian Grand Prix will be held early next month. Related Video:

McLaren 675LT Spider roofless up top, party in the back

McLaren says "significant customer demand" led it to develop the 675LT Spider, the open-roofed version of the 675LT coupe introduced just this year at the Geneva Motor Show. With coupe production limited to 500 units and wealthy buyers practically buying supercars in bulk, McLaren assured itself of that "significant customer demand." The roadster version is also limited to 500 units worldwide. Although it is 88 pounds heavier than the hardtop version, the weight is solely due to the mechanism that retracts the three-piece roof. Otherwise, the Spider buyers will get a spec sheet almost identical to the closed-roof model: 666 horsepower and 516 pound-feet from the twin-turbo, 3.8-liter V8, and the 0-to-62-mph sprint completed in just 2.9 seconds. You will only begin to lose time on the run to 124 mph, which takes 0.2 seconds longer in the roadster, and the Spider's top speed of 203 mph is two mph slower than the coupe. Miserly purchasers will be happy to know that fuel economy holds steady at an EPA-certified 18 mpg combined. The Spider gets a few treats all to itself like the sun-hued Solis paint, optional 20-spoke lightweight wheels, and Xenon Yellow contrast stitching as one of the By McLaren interior options. If you prefer to go inconspicuous, there's a Club Sport Professional Pack that throws a lot of "stealth detailing" at the exterior along with dark wheels. The price comes in at $372,600, if you have to ask. The press release below has more. McLAREN 675LT SPIDER TAKES THE TOP OFF ITS MOST ENGAGING AND EXHILARATING MODEL- 666 hp and 516 lb-ft provide breathtaking performance, while a retractable roof adds further exhilaration- 220 lbs weight saving delivers a dry weight of 2,800 lbs, delivering a power-to-weight figure of 4.2 lbs per hp- Second model to wear the 675LT badge in direct response to significant customer demand- Exclusive Solis paintwork and 20-spoke Super-Lightweight forged alloy wheels offered for the first time- Priced at $372,600 USD, the most focused, fastest and exhilarating open top McLaren model ever built will be strictly limited to 500 units globallyNEW YORK, NY (December 3, 2015) – McLaren Automotive has revealed the latest chapter in the history of the iconic 'Longtail' name with confirmation of the 675LT Spider. Strictly limited to only 500 examples worldwide, it is only the second model to wear the LT badge, nearly 20 years McLaren resurrected the name, and is in response to significant customer demand.