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BMW reveals M4 safety car with innovating water injection system [w/video]

Racing series don't just pick their safety cars at random, or use just whatever car is lying around. These days the car that sets the pace at the front of the pack is typically provided through consideration by a sponsor. In the MotoGP series, that's BMW and its M division, which have served up the Official Car of MotoGP since 1999. What you're looking at is the latest, and it packs some innovative technology on board. Aside from the matte black wrap with BMW's iconic striped livery, upgraded aero kit, retrofitted interior and emergency equipment, this BMW M4 coupe packs a new injection system under the hood. Only instead of injecting fuel, it injects water into the combustion chamber – something that wouldn't usually be recommended, but BMW insists actually aids in the combustion process. The idea is that the temperature of the air being mixed with the fuel inside the engine is usually hotter than ideal, so the system injects a fine mist of water into the collector in order to reduce the air's temperature... sort of like one of those hydrating misters at an amusement park or outdoor mall, but in an even hotter environment. The system brings the temperature of the air down to a more optimal temperature, helping it combust better. The process is said to yield a number of positive effects. For one, it reduces knocking. For another, it can make more out of lower-octane fuel where higher octane isn't available. It also can control the adverse effects of higher ambient temperature on the combustion process. But most of all, it increases output and reduce fuel consumption by around eight percent. Whether that eight percent is worth the added weight of the system – particularly with water pump and a 1.3-gallon tank in the trunk – is up for debate. But we'd imagine that the Bavarian engineers have weighed very carefully. Of course there's also the matter of refilling the water tank, which BMW says would be carried out whenever the safety car is refueled, but in real-world conditions would only necessitate attention once every five top-ups at the gas station. By now you might have guessed that BMW probably didn't develop this system just for the MotoGP safety car, and isn't planning on keeping it confined to the racetrack. Instead it's being tested and demonstrated on the safety car before being rolled out on production models in the future.

BMW X4 M probably not in the cards

BMW is preparing to exploit its latest market niche - those that find themselves unable to choose between the 3 Series, 4 Series and X3 - with the X4. If you're looking for an M product, though, you'll remain limited to the 3 and 4 Series. BMW's Bernhard Ederer, at the Australian launch of the X5, told Car Advice he wouldn't "bet on it," when asked about a hotter X4.
Oddly, Ederer's reasoning, according to the Aussies, is out of concern for the X6 M, whose sales the X4 M would apparently cannibalize. That's like saying the M3 doesn't make sense because it will cannibalize M5 sales - the logic just doesn't really hold up. "The question is what customers are we talking to? And are we talking to someone that is willing and able to afford [an X6 M]?" Ederer told Car Advice.
Car Advice seems to feel the same way, claiming the X3-based X4 will share its powertrains with its donor platform, and will eventually spawn an M variant, albeit a few years down the line.

Autoblog Podcast #523 | BMWs, Trackhawk and Mazda's new engine technology

On this week's Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by Associate Editor Joel Stocksdale. We discuss a couple of BMWs, the upcoming BMW X7 three-row SUV and our short-term BMW M760i with a turbocharged, 600-horsepower V12. We also cover the week's news, including Mazda's nifty engine technology it will roll out in the next few years, as well as pricing on the new Jeep Grand Cherokee Trackhawk. The rundown is below. Remember, if you have a car-related question you'd like us to answer or you want buying advice of your very own, send a message or a voice memo to podcast@autoblog.com. (If you record audio of a question with your phone and get it to us, you could hear your very own voice on the podcast. Neat, right?) And if you have other questions or comments, please send those too. Autoblog Podcast #523The video meant to be presented here is no longer available. Sorry for the inconvenience.Get The Podcast iTunes – Subscribe to the Autoblog Podcast in iTunes RSS – Add the Autoblog Podcast feed to your RSS aggregator MP3 – Download the MP3 directly Topics and stories we mention Rundown BMW X7 Spy Shots Volkswagen Passat GT Mazda's future engine technology Jeep Grand Cherokee Trackhawk Pricing BMW M760i driving Ram 2500 driving Spend My Money Feedback Email – Podcast at Autoblog dot com Review the show on iTunes