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This is what a 1,200-hp twin-turbo 4-rotor looks like in a Miata

We've seen the diminutive Mazda MX-5 Miata swallow plenty of big engines, but New Zealand drifting ace "Mad Mike" Whiddett is roaring into where-no-man-has-gone-before territory. Wanting to replace his 515-horsepower "MADBUL" RX-7 and its twin-turbocharged, three-rotor 20B engine, his new ride is an NC-series Miata with four rotors and twin Garrett turbochargers courtesy of Pulse Performance Race Engineering. It is called "RADBUL," and expected power at standard boost is 1,200 hp, but the builders at Pulse Performance think it will get up to 1,500 hp at full boost. And yes, that exhaust exits through the hood. Four-rotor engines are actually popular - builds are detailed on forums like this one from 2007 and this one from 2008, this UK company or this Canadian company will sell you one complete - but they're usually being prepped for an RX-7. Mad Mike's choice of a Miata for this enterprise makes this about as extreme as you can get, short of throwing it into a Mazda R360. You can watch Mad Mike tell the story of the build in the video, and check out the first and second installments about the build on the Red Bull site.

Edmunds ranks the best used cars for 2013

When people ask us what car we would recommend for them, it's usually not easy to answer. To make a useful recommendation we must consider which of the numerous vehicle segments fits their needs best, and then choose one of the many vehicles offered in each segment. For some people, new cars don't meet their expectations of value, because they lose so much of it the moment they are purchased and driven off the dealer lot. For them, there's always the used-car market, where great deals can be found, but cars' histories of reliability and maintenance records - and perhaps that Certified Pre-Owned warranty - become ever-important factors playing into purchase choice.
To help out, Edmunds has done us the favor of assembling a list of the best used vehicles money can buy, covering model years 2006-2011, according to what it considers the most important criteria when shopping for used autos: reliability, safety, value and availability. That means unreliable, unsafe, super-expensive or limited-edition models don't appear on the list, but instead cars from each segment that are more likely to satisfy the general population.
There are some real goodies on the list, including but not limited to vehicles such as the capable Honda Fit, the cultish Honda Accord coupe (which can be had with a 240-horsepower V6 and a six-speed manual transmission some years), and the powerful Chevrolet Corvette. While Edmunds' choice of the Volvo C70 for best used convertible baffled us at first (not that it's a bad car), it redeemed itself by stating that the Mazda MX-5 still is an unofficial top choice if you don't require more than two seats.

New Mazda CX-4 teaser shots emerge ahead of Beijing debut

The Kodo styling language seen on last year's Koeru concept seems to translate well to a production car, judging by these teaser images of the upcoming CX-4 from Mazda's Chinese press site. And, as has been seen on several recent Mazdas, concept cars can be quite close to their eventual production versions. An earlier press release implies the CX-4 should be seen as a more coupe-like counterpart to the CX-5, with some of the MX-5's characteristic and often emphasized jinba ittai feel injected into it – if the MX-5 is all about the rider and horse being one, the CX-4 would just be a slightly bigger steed. The 19-inch wheels and LED headlights are some of the more attention-grabbing details on the car. Inside, there's a head-up-display and a MZD connect infotainment screen as seen on other current models. The hardware on the "Exploring-Coupe SUV", as Mazda call it, should match the CX-5: 2.2-liter SKYACTIV-D turbodiesels in some markets, 2.0 and 2.5-liter SKYACTIV-G gasoline engines in most. There will also be a choice of front-wheel-drive or all-wheel-drive. The Beijing Motor Show opens to the public on April 29th, so we won't have to wait a whole lot longer to see the whole thing. Related Video: