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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.

2016 Mazda CX-3 scores 29/35 mpg EPA ratings

Looking for a subcompact crossover that won't cost you too much at the pumps? Your best bet is now the new Mazda CX-3, according to fuel economy figures released by the EPA. Mazda's new baby crossover has been rated by the US government agency at 29 miles per gallon in the city, 35 on the highway, and 31 on the combined cycle. That's in front-drive spec, giving the CX-3 better fuel economy than anything else in its class (at least, that is, with an automatic transmission.) Option it with all-wheel drive and you'll take a slight penalty at 27 mpg in the city, 32 on the highway, and 29 combined. According to Mazda that still "makes it among the most fuel-efficient all-wheel-drive vehicles available in the US." Whichever drivetrain option you go for, the CX-3 packs a 2.0-liter inline-four with direct injection (Skyactiv-G in Mazda-speak) good for 146 horsepower and just as much torque, mated to a six-speed automatic transmission. The first examples will begin reaching American showrooms later this summer. Related Video: 2016 Mazda CX-3 Scores Class-Leading[1] EPA Fuel Economy Ratings - New Subcompact Mazda Crossover Has EPA-Estimated Fuel Economy of Up to 35 MPG Highway - IRVINE, Calif., June 8, 2015 /PRNewswire/ -- The all-new 2016 Mazda CX-3 subcompact crossover utility vehicle has been rated with an EPA-estimated fuel economy as high as 29 mpg city/35 mpg highway[2], which positions CX-3's fuel economy as class-leading1 among all 2015 and 2016 subcompact crossover utility vehicles. As Mazda's first foray into the quickly burgeoning subcompact crossover class of vehicles, CX-3 provides those seeking a purposeful, stylish and sporty vehicle option that bucks convention. CX-3 offers standard keyless ignition and backup camera, and is available with features that are unrivalled in its class like Mazda Radar Cruise Control, adaptive LED headlights and Mazda's signature driving experience. Front-wheel-drive models have EPA-estimated fuel economy of 29 mpg city/35 mpg highway/31 mpg combined, while models equipped with Mazda's predictive i-ACTIV AWD have EPA-estimated fuel economy of 27 mpg city/32 mpg highway/29 mpg combined. That makes it among the most-efficient all-wheel-drive vehicles available in the U.S. "SKYACTIV Technology means we don't have to compromise when it comes to performance, efficiency and fun-to-drive dynamics," said Jim O'Sullivan, president and CEO, Mazda North American Operations.

Toyota and Mazda set to expand partnership

Toyota and Mazda are already teaming up for the Scion iA and Mazda2, but that partnership might just be the beginning. Reuters reports the two Japanese companies could expand their work together, with Toyota chipping in its experience with both fuel cells and plug-in-hybrid tech, and Mazda contributing its know-how in regards to its Skyactiv line of engines. The report cites a pair of unnamed sources that are "not authorized to discuss the matter publicly." The move, on the surface, is certainly appealing for both parties. Mazda has very little experience with hybrids (remember the Ford-rebadged Tribute Hybrid?), let alone something as advanced as a fuel-cell vehicle. Teaming with Toyota, arguably the world's greatest hybrid manufacturer, would give it a serious leg up. For the Japanese giant, meanwhile, a partnership with Mazda could expand the economy of scale for the Mirai FCV's tech, while Skyactiv engines would do well in replacing the base engines in cars like the Corolla, Camry, and RAV4. What are your thoughts? Would an expanded partnership between Toyota and Mazda make sense? Can you think of any drawbacks? Have your say in Comments. Featured Gallery 2016 Toyota Mirai View 15 Photos News Source: Reuters Green Mazda Toyota Electric Hybrid skyactiv toyota mirai