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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.

Toyo Tires will bring another wild catalog of rides to SEMA

Toyo Tires carts all kinds of toys to SEMA every year, the rubber company planning another 30 or so automotive exhibits this year in two locations. One of them, the Baja 911, comes with a pedigree not usually associated with the bewildering wares hawked at the Las Vegas show. TJ Russell was once lead fabricator for Singer Vehicle Design, now he's the head of Russell Built Fabrication in Sun Valley, CA. Sticking with the marque he knows well, Russell started with a 1991 Porsche Carrera 4 cabriolet, fitted the interior with a full roll cage, then built a hardtop around it to design a desert runner channeling the old Rothmans safari 911s. Underneath that bodywork lives a box-plate trailing arm suspension with 12 inches of travel, working 15-inch Fifteen52 FIA-approved Gravel wheels and 30-inch Toyo Open Country A/T II tires. Power comes from a purpose-built 3.8-liter air-cooled flat-six with about 350 horsepower — 100 hp more than stock — in a car that weighs 400 pounds less than the original. Oh, and as documented on Instagram with the tagline "All race outside, all business inside," the interior's full of quilted, cross-stitched leather, and Toyo says Russell's going to do a low-volume run of the Baja 911 starting early next year. ruffian-ford-mustang-sema-01 View 10 Photos Chris Ashton built a 1970 Ford Mustang Fastback called the Ruffian Mustang, inspired by the Trans Am Racing Series. The exterior changes are more subtle than one might think – the chin spoiler, hood scoop, and side mirrors are barely exaggerated versions of those on the original car, the intake vents astride the front lights and the steel bumpers teleported from 1970. Changes outside include de-chromed and flush-mounted glass, vented hood, front fenders that are dropped an inch, rear fender vents, dual side-exit pipes, and gargantuan fender flares over staggered Signature One wheels and Toyo Proxes 888 tires. The interior's fitted with a roll cage and race car workings. In spite of the Boss 427 badging, the engine's a 625-hp Chevrolet LS3 V8. button-built-ferrari-355-sema-01 View 13 Photos The Button Built Ferrari BB355TT picks up from last year's stanced BB328GTS widebody that gave many Internet denizens heart attacks. Laid up on a 1999 355 Berlinetta, the BB version appends a widebody kit designed Mitchell Button, rendered by Khyzyl Saleem and drenched in Azzuro la Plata, a color from Ferrari's Scagliette palette first used on a 1967 275GTB Le Mans racer.

Porsche Museum highlights history of the 911 RSR

Porsche has amassed quite an impressive trophy case in just about every racing series it has ever entered, and one of its most dominant machines has to be the 911 RSR from the 1970s. Taking part in various GT-class competitions, the 911 RSR managed to take home three international and seven German victories in 1973, its very first year of competition.
Not one to downplay its racing successes, Porsche has released an informative video detailing the 911 RSR's impressive heritage. The 1973 RSR model owned by the Porsche Museum is detailed beautifully on video, and we have to say it looks absolutely stunning in its vintage Martini Racing livery.
Have a look at the video below for some historic racing action, along with static shots of one of our favorite Porsche models ever created.