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2013 Dinan S3 BMW 550i

Steve Dinan has been enhancing BMW models since 1979. But don't throw his company into the ring with the dozen or so other tuners who tweak, tinker and piggyback upgrades on the famed German marque. Dinan is a tuner, but it's also an engineering firm that writes its own software, builds its own parts and then backs everything it does with a factory-grade warranty. That sort of fastidiousness comes at a price, but most of its customers - including the powerhouse of BMW Motorsport - rely on Dinan to help them come out on top.
In stock form, BMW's 550i is a formidable four-door with a twin-turbocharged 4.4-liter V8 rated at 400 horsepower and 450 pound-feet of torque. While those figures allow it to run with quick company (0-60 in 5.0 seconds, according to the automaker), Dinan puts the sedan's kettle on full boil with its S3 package. Starting with the engine, the performance engineering firm bolts on larger turbochargers, air-to-water intercoolers, a trick strut tower brace cold air intake, a quad-pipe free flow exhaust and its own engine management software. Pump in some premium fuel, and the result is 542 horsepower and 587 pound-feet of torque. Power is sent through the stock eight-speed automatic to a limited slip rear differential (Dinan will upgrade xDrive all-wheel drive models, too).
The Dinan S3 also features and extensive suspension upgrade that includes new front camber arms and low compliance rear control arms (engineered to reduce understeer and improve turn-in). The stock dampers are retained, but new bump stops are installed along with new springs. Overall, the car rides about a half-inch lower than stock to improve roll rate. To reduce unsprung weight, forged 20-inch HRE Performance wheels are fitted at all four corners (wearing Michelin Pilot Super Sport tires - 275/35ZR20 up front and 295/35ZR20 in the rear). Lastly, the company remaps the factory Electronic Damper Control (EDC) software with its own Dinan Shockware to work in conjunction with the new enhancements.

Recharge Wrap-up: Renault's electric motors, BMW i3 is AM free

Why isn't AM radio offered in the BMW i3? Some drivers – particularly those interested in local traffic reports – have noticed its absence. BMW says that the electromagnetic interference from the electric drivetrain caused poor performance, and that while reception wasn't always terrible, it wasn't up to their standards. Rather than have customers complain to their dealers, who would be unable to do anything for them, BMW has disabled AM reception in the i3. Some customers have hacked their cars in order to enable the AM radio, despite possible warranty issues, and have found the reception to be acceptable. Read more at Green Car Reports. Saab's current parent company, National Electric Vehicle Sweden (NEVS), broke ground for production and R&D facilities in Tianjin, China. The facilities are part of joint ventures with the city of Tianjin and State Research Information Technology (SRIT). In addition to investments of over $190 million from SRIT and Teamsun, NEVS has received $1.6 billion in credit from the Bank of China to develop its business there. The new Tianjin factory will have a capacity of 200,000 new energy vehicles per year. The facility in Trollhattan, Sweden will provide manufacturing planning, training, and product supply for the Tianjin plant. Read more at Green Car Congress, and in the press release from NEVS. Renault is building the new R240 electric motor for the Zoe at its Cleon plant. The plant and its employees, which specialize in the Energy dCi diesel engine, have adapted to produce high volumes of the electric motor as well, including a 6,000 hours of training for the staff and millions of dollars in investments. "We aim to become the leading powertrain plant for the Alliance," says Cleon plant director Mendi Ammad. The plant is capable of producing 50,000 units of the R240 motor per year, with that number expected to double in the future. Read more about the plant and the production process the press release below. NEW ELECTRIC MOTOR STRENGTHENS POWERTRAIN EXPERTISE AT CLEON ZOE's new electric motor, unveiled at the Geneva Motor Show, is a 100% Renault motor manufactured at the French site of Cleon, already specialized in highly technical powertrain production. Until now, the flagship of the Cleon plant was the Energy dCi (130, 140, 160) internal-combustion engine. The diesel unit with advanced technological content has made a name for itself at Groupe Renault, the Alliance and with our partners.

BMW M boss denies supercar collaboration with McLaren

The first time there was a McLaren Honda Formula 1 team, McLaren did some moonlighting with BMW on a supercar for all time, the F1. It just so happens that McLaren Honda is a thing again, and Car magazine recently ran a piece saying McLaren and BMW would get back together on another hopped-up coupe with roughly the same working agreement as before: BMW supplies a screaming V8, McLaren builds the body to go around it. Only this time the car would be a BMW model, not a McLaren, and be BMW's version of the next-generation McLaren 650S. The Car piece said that BMW head of R&D Klaus Frolich first got in touch with McLaren nine months ago, however, the head of BMW's M division, Frank van Meel, said he doesn't know anything about it. Mentioning every BMW exec referred to in the story, van Meel told Australia's Motoring, "I haven't had a phone call, [CEO] Harald Kruger hasn't had a phone call, and Klaus Frohlich hasn't had a phone call." The Car story said the reason BMW hasn't done a conventionally powered exotic recently is that former CEO Norbert Reithofer didn't want anything to eclipse the i8, the i brand, and the eco credentials the brand is charged with promoting. Changes in the executive suite – new CEO, new M boss, new R&D chief – were thought to meant changes in approach. Not according to van Meel, who gave those same i brand reasons to Motoring as then reasons BMW has no interest in a 750-horsepower, quad-turbo coupe. On top of that, after spending billions to move the game forward with in-house carbon fiber technology, van Meel asked, "I don't understand why we would need to work with McLaren for a supercar anyway. All of the technologies the story suggested are technologies that are core competences here at BMW and at M. Nobody in the world is more advanced with carbon-fibre than we are." The extent of the denial is so detailed that we're inclined to believe BMW on this one; cover stories usually stop at curt phrases like "We have no knowledge of that" or "We don't comment on future product." So you can put away your dreams of a McLaren F1 Part Two. For now. Related Video: