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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.

2014 Mazda3 breaks cover early, in Euro-spec at least

We're set to get a closer look at the US-spec 2014 Mazda3 later today, but AutoExpress has the first peek at the machine's European cousin (after initial leaks reportedly came from a Czech outlet). The photos show a compact that's taken plenty of design inspiration from its older sister, the Mazda6. That's excellent news, as the larger car's dynamic front fascia, accentuated fender arches and long nose translate well to the Mazda3. Inside, there are are new and improved material choices, and the longer wheelbase means occupants get to enjoy more room than before. There's also a larger trunk with 12.3 cubic feet of cargo capacity.
Buyers in the EU can get their hands on a 1.5-liter Skyactiv-G gasoline engine with 99 horsepower, though the old 2.0-liter four-cylinder will still be available in either 118 hp or 163 hp configuration. A 2.2-liter diesel tops out the engine choices.
The 2014 Mazda3 is lighter than its predecessor and boasts disk brakes and a multi-link rear suspension on every trim. That means this thing should be fun to shuffle around. Stay tuned for details on the US-spec variant later today, including a lot more images of the good-looking hatch.

Mazda hard at work on Skyactiv 2 engine technology

As Mazda continues the current rollout of its still-new Skyactiv technology, the automaker is already looking at improving its family of engines for even better fuel economy and emissions reductions. Automotive News reports that with stricter fuel economy and emissions regulations planned for 2020 and 2025 in Europe, Mazda will likely release engines with next-generation Skyactiv 2 technology by the end of this decade, and Skyactiv 3 units just five years later.
The latter is expected to focus on improved engine cooling and lessening energy losses, but the big news in AN's report is that the next-gen Skyactiv 2 engines will use Homogeneous Charge Compression Ignition, or HCCI. This type of ignition is very similar to how a diesel engine operates (with high compression and using the compression stroke for fuel combustion rather than spark plugs), a method said to provide a cleaner and more efficient fuel burn - to the tune of a 30-percent improvement in fuel economy compared to current Skyactiv engines. Other automakers, including Hyundai, have already announced they are developing HCCI powerplants with similar technology and characteristics, so Mazda likely won't be a lone wolf here.
Equipped with HCCI technology, Mazda figures to be able to compete with larger automakers in terms of fuel economy and emissions without resorting to hybrid powertrains, continuously variable transmissions or automatics relying on more forward gears (eight or more) for optimal efficiency. Some of the challenges of HCCI, according to AN, include the need for better engine cooling, risk of misfire at high and low rpm and uneven engine performance based on fuel properties.