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The 2017 Porsche 911 RSR goes mid-engine, purists be damned

Porsche unveiled its World Endurance Championship and IMSA WeatherTech Championship competitor with the 2017 911 RSR. And this 911 is different from the rest, as the 4.0-liter flat-six engine powering this beast is in front of the rear axle, not behind it. That's right, this 24 Hours of Le Mans competitor ditches the iconic rear-engine layout. Porsche isn't talking specifics on how exactly things are arranged back there. The engine is new, now based on the 991 911's block instead of the previous Mezger motor that's been used for years. The transmission design is new as well – it would have to be to accommodate the new location relative to the engine. The racecar has been engineered to meet the LM-GTE class, where it will go up against other mid-engine cars like the Ford GT and Ferrari 488 GTE. Moving the engine to the middle has given Porsche the ability to fit the 911 RSR with massive bits of aero, like the humongous rear diffuser that looks like it would be more at home on a machine of war. The only thing that can compete with the diffuser for size is the top-mounted rear wing, which shares a similar design to the one found on the 919 Hybrid. Going back to the engine, the direct-injected boxer motor, depending on the size of the restrictor, generates as much as 510 horsepower and sends all of its fury to the rear wheels. The engine is paired to a six-speed sequential gearbox, which drivers can employ through paddles on the steering wheel. The new engine doesn't have a lot of weight to push around as the 911 RSR, as required by regulations, weighs 2,740 pounds. Speaking of weight, the engine layout isn't the only change for the 911 RSR. For 2017, the car ditches its steel body for one that's made out of carbon fiber. The body attaches to the chassis via quick-release fasteners, making the vehicle easier to service as exterior elements can be removed with minimal effort. The racecar also gets a radar-based collision system – aptly named the "Collision Avoid System" – which is meant to limit the 911 RSR's encounters with faster LMP prototypes. Only time will tell if the new layout and aerodynamic components help the 911 RSR beat its competition. But there will be plenty of opportunities to see the racecar in action as Porsche plans to run the 911 RSR in 19 races during the 2017 season, the first of which will take place at the IMSA opener on January 28th at Daytona, where the racecar will make its track day debut.

Are you the 2017 Porsche 911 GTS Targa?

Our spy shooters have caught a strange, mash-up beast wearing a Porsche badge. Superficially, this is a facelift for the 911 Targa that features new bumpers, door handles and a redesigned engine cover, along with new light graphics for the front and rear lights. But have a look around back, and you'll find two inboard exhaust pipes; they aren't right up against each other as on the 911 GT3, but are spaced about five inches apart. The shooters said the first time they saw that arrangement was last winter, on a convertible during testing. We saw it again more recently in spy shots of what was thought to be the 911 GTS coupe prototype at the track. But when the production GTS arrived, it wore the traditional quad-pipe at the corners. The theory put forward by the spy photog: the current GTS has a naturally aspirated engine, but facelifted prototypes they've been seeing all have turbo engines, so this could be the facelifted Targa coming in 2017, after the 991-model 911 gets a refresh. In that case, the GTS coupe prototype at the track would have also been a post-refresh, turbo-engined GTS. It's only a hypothesis, but more than one outlet has reported that Porsche is going all-turbo for the updated 2015 models – the new exhaust position and those 911-Turbo-like vents could be their identifiers. We expect to find out when the lineup is unveiled at the 2015 Geneva Motor Show, possibly codenamed 992 instead of 991.2.

McLaren rules out Porsche Cayman competitor

McLaren has gone downmarket with the introduction of its new Sports Series, but don't expect it to go any lower than that. So while the 570S goes up against the Audi R8 and Porsche 911 Turbo, the likes of the TT and Cayman can rest easy. Speaking with Autocar, McLaren designer Robert Melville ruled out the prospect of developing a sports car positioned lower than the Sports Series. Melville dismissed the idea of a Cayman rival from Woking as "a step too far" and "not exclusive enough" for McLaren. "You look at Ferrari. They are coming from very high end. [The 570S] is stretching us down to R8s and 911s and is as low as we'd want to come." The limit may be dictated, more than anything, by the building blocks. The newly introduced Sports Series adopts the same essential hard points as the higher-end Super Series (650S) and Ultimate Series (P1). Like its more expensive siblings, it features a 3.8-liter twin-turbo V8 mated to a seven-speed dual-clutch transmission and bolted to the back of a carbon monocoque chassis. Only instead of selling for $265k like the 650S or over $1 million like the P1, the 570S will retail for under $190k. Volume is how the manufacturer aims to make up the difference. In fact McLaren stands to generate as much revenue (if not necessarily the same profit margin) selling 2,500 units in the Sports Series each year as it has producing all 375 examples of the P1. Making those same building blocks available at a lower price point – or developing an entirely new set – would be an entirely different proposition... one which McLaren is evidently less than keen to undertake. So while we can look forward to new versions of the Sports Series to follow – including Spider and GT variants soon to follow – more commonplace stablemate appears to be off the table. Related Video: Featured Gallery 2016 McLaren 570S: First Drive View 34 Photos News Source: AutocarImage Credit: Copyright 2015 AOL McLaren Porsche Performance Supercars mclaren 570s mclaren sports series