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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.

Mazda considering a 'hyper' Mazda3 with the 250-hp 2.5-liter turbo four

Mazda boss Akira Marumoto said last year there'd be no Mazdaspeed version of the new Mazda3 because the hot hatch segment wasn't a priority for the carmaker. Then Mazda engineer Dave Coleman told Road & Track that without "an engine on the shelf that would fit properly," an MPS variant made no sense. The first reader comment on our Coleman post read, "Engine — you have it; cue up the 2.5T." Mazda might have been listening. Program manager Kota Beppu told Autocar he'd like a "hyper" Mazda3, the outlet figuring the 2.5-liter four-cylinder turbo would make the most sense for power. Autocar wrote "the project had not been officially signed off, [but] insiders suggest that is a formality." When Car and Driver queried Mazda and its sources about the report, the magazine realized "the company is seriously considering a high-performance hot hatch." What's more, "Drew Cary, senior manager for brand communications, said, 'We encourage people to ask for it, though. Our planners and executives are watching and listening to fans.'" The turbocharged 2.5-liter SkyActiv-G four-cylinder — which doesn't sell in Europe — makes 250 hp on premium gasoline and 310 pound-feet of torque in the Mazda6, CX-5 and CX-9. A next-generation SkyActiv-G is predicted on the way next year, bringing more boost and power. Even as is, we're talking a chunky lump of power to send to the front wheels, and Beppu mentioned torque steer. The new Mazda3's all-wheel drive would alleviate that bugbear. Unlike the raw, fast-twitch reflexes of the last Mazdaspeed3 from 2013, Beppu says a new model "needs to be responsible and friendly ... more friendly than a Golf GTI." And, "It should be fast." The polished looks and interior address the necessary perceptions. CD's done the math on the current 2.5-liter and predicts a five-second sprint to 60 miles per hour, which is Volkswagen Golf R and Honda Civic Type R territory, so GTI comparisons could be a case of aiming low. Imagine a 300-hp engine with a touch more torque and a six-speed manual ... If Mazda follows through with such a product, it could take two years to get the green light. However, we're told that Mazda's Los Angeles research and development center has already built a proof-of-concept to encourage and anticipate that green light.

Carmakers, NHTSA to unveil auto-emergency braking agreement tomorrow

Happy St. Patrick's Day Eve. Tomorrow, there will be green beer, corned beef and cabbage, and automatic emergency braking for all. Weird combo, we know. But on St. Patty's we can expect an official announcement from a pact of automakers making auto-braking systems standard equipment by 2022. That's per a report from Reuters, which cites three sources familiar with the plans. Originally announced in September 2015 by 10 automakers and the National Highway Traffic Safety Administration, the agreement is expected to be even larger when the details are unveiled tomorrow. According to Reuters, the manufacturers of 99 percent of the US domestic market's vehicles will be represented by the new agreement. It's believed that standard AEB systems could prevent thousands of accidents across the country. Expect more on the official announcement when it's made. Related Video: