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Roller coaster or racecar, which pulls more Gs?

Looking for a thrill? You're not the only one. You'll find kindred spirits at airfields going up for a skydive, atop bridges and towers with bungees attached to their feet and standing in line for roller coasters at the local amusement park. But you'll also find them in the paddock at the racing circuit.
So what's the commonality? G-force. It's like gravity, only in each of these cases, it's experienced by human invention. But which activity subjects your body to the greatest amount of g-force? That's what Nissan set to find out.
Before putting them back in the cockpit, Nismo sent out two of its young hot-shoes - Jann Mardenborough and Mark Shulzhitskiy - to an amusement park in the UK with a camera and a g-force meter to find out if any of the coasters could produce as much lateral gravitational force as an LMP2 racing car. See what they found in the pair of videos, below.

Nissan bringing GT-R LM Nismo to Le Mans in 2015 [w/videos]

The Nissan Zeod RC hybrid racecar is certainly cool with its pointy looks, we're excited to see it run, but it isn't built to win races so much as push boundaries. But we might not have too to wait long for one of the Japanese brand's vehicles to claim an overall victory at the 24 Hours of Le Mans, as well. The company is announcing the GT-R LM Nismo racecar with a two-car, full factory effort in the top LMP1 class of the 2015 FIA World Endurance Championship, including Le Mans.
Details about the new racer are almost nonexistent at the moment. The only glimpses that we have are its silhouette under a sheet (above) and the briefest peek at its quad circular taillights in one of the teaser videos. However, the team is making some big promises about the car. "We want to win in a very different way to that of our rivals. We won't be turning up in a vehicle, which is a basically another hybrid that looks like another Porsche, Audi or Toyota - they all look the same to me," said Nissan's Chief Planning Officer and Executive Vice President Andy Palmer in the official announcement. Mechanically, Nissan is revealing even less about the GT-R LM Nismo for now. We are just going to have to wait and find out.
The brand will be aiming for a win in the 24-hour race, but it won't come easy. Nissan will absolutely face stiff competition from the combined forces of Audi, Porsche and Toyota in the top LMP1 class. Scroll down to watch two teaser videos for the newest member of the GT-R family and read the full announcement.

Watch this 800-hp Nissan Juke-R savage the 'Ring

The concept of the 545-horsepower Nissan Juke-R that stuffs the drivetrain of a GT-R into a subcompact crossover is already insane, but Russian company Shpilli Villi Engineering has taken things even further with their own crazy riff on the idea. Its version tunes the engine up to a claimed 800 horsepower, plus a shot of nitrous for an extra 200 hp to put it (way) over the top. Naturally, a number of other upgrades have been exacted in an effort to try and keep the custom Juke's shiny side up and the driveline internals from spontaneously rearranging themselves. Those changes include a beefed-up switchable all-wheel drive or rear-wheel drive layout and revised suspension.
Last year, you may recall that we saw an earlier version of Shpilli Villi Engineering's insanity testing with a mere 700 hp in a one-mile, standing drag race against a Bugatti Veyron. In that state of tune, the Juke-R lost, but by less than a hundredth of a second. Now, owner and racer Vladimir Ulanov has brought his madness to the Nürburgring Nordschleife to see how it does around a damp lap of the famous track.
It looks like 800 hp and a moist track might be almost too much for this Juke to handle, because Ulanov gets very loose at several points during the lap. Understandably, his passenger seems suitably impressed and possibly a little freaked out at the end. See what you think of this craziness by watching the video.