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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.

Consumer Reports' first motorcycle reliability report finds Japanese brands ahead

Consumer Reports has released its first ever study of motorcycle reliability, and students of its ratings on cars might notice a suspicious similarity - Japanese brands require fewer repairs than the leading American or German brands.
The study analyzed the reliability of 4,680 bikes owned by CR subscribers and found that Yamaha had the best ratings, with just one in ten bikes built between 2009 and 2012 requiring a repair over a four-year period. The makers of the R1 and R6 sport bikes were closely followed by Kawasaki and Honda, while one out of every four of the rumbling bikes from Harley-Davidson experienced an issue. BMW had the worst rating of the brands represented, with one in three bikes having problems.
According to CR, neither Suzuki nor Triumph owners provided enough information for a reliable rating. Based on the responses received, though, Suzuki would have finished with the other Japanese brands and Triumph, being English, would have been one of the less reliable makes.

BMW M4 pitted against i8 in drag race

Germany's Auto Bild has set up a very intriguing drag race to settle not just an inter-brand rivalry within BMW but a question of the old school versus the latest tech. The BMW M4 is a leader among the traditional sports coupes with a turbocharged inline-six spinning the rear wheels, but the M has to tackle the cutting-edge i8 with its turbocharged three-cylinder augmented with electric drive. See what happens when they go head to head. Even on paper, the race looks quite close. The i8 weighs about 300 pounds less than the M4 and also slightly nudges it out on net torque at 420 pound-feet versus 406 lb-ft. Also in some shots, the pavement looks just a little bit damp here, which would benefit the i8's all-wheel drive setup. However, the M-car has a healthy horsepower advantage with 425 hp against the hybrid's 357 hp. The race commences after a short introduction. Watch and see whether the traditional tech or latest layout wins the day. Related Gallery 2015 BMW M4 Coupe: First Drive View 38 Photos Related Gallery 2015 BMW i8: First Drive View 62 Photos News Source: Auto Bild TV via YouTubeImage Credit: Related images Copyright 2014 Michael Harley, Drew Phillips / AOL Green BMW Coupe Hybrid Performance Videos drag race race bmw m4