G-Power Transfers BMW M5 Hurricane RR Supercharger Tech to the E85 Z4 Roadster

German tuner G-Power has decided to share some of the technology found on the 800-horsepower M5 Hurricane RR and M6 Hurricane RR with the masses by offering a modified version of the supercharger system on the [previous generation] E85 BMW Z4 as well as the E46 Series with the 3.0-liter straight-six engine. On both models, the redesigned SK Plus supercharger system replaces the previous ASA TM3 supercharger.

The geometry of the compressor has been modified as has the housing, resulting in a more efficient build-up of boost in the middle rev-range. With a 0.3 bar pressure boost, the SK Plus kit increases output by 55 ponies, to 286 hp and 345 Nm (255 lb-ft). Thanks to the extra oomph, the tuned Z4 accelerates from standstill to 100 km/h (62 mph) in 5.4 seconds.

To be able to wring out every bit of performance delivered through force induction, the German tuner recommends customers to specify their cars with a 9-way adjustable coil-over sport suspension. 20-inch multi-spoke Silverstone Diamond alloys, wrapped around in 245/30 front and 285/25 rear Michelin tires, can be ordered, too. For a more ferocious roar, G-Power can provide a new, hand-built rear silencer, with matching tail pipes.
Granted, these changes don’t transform the Z4 SK Plus into a Hurricane killer, but the tuner charges only €2.500 (VAT excluded) for the performance upgrade, which as we mentioned previously, is also available for the E46 BMW 3 Series.

By Csaba Daradics

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BMW Z4 Silver-Top: New Limited Edition Model, only for Japan

Another day, another BMW special for the Japanese market. Following the recent launches of the X6 xDrive35i and 120i Coupe Performance Unlimited editions, BMW has released another limited production model for Japan, this time based on the Z4 hardtop roadster.

As its name suggests, the most prominent feature of the Z4 Silver Top edition is the Titanium Silver finish of the two-piece electric folding hardtop and exterior mirror caps, which create a contrast with the Black Sapphire paintjob of the body. Inside, the special edition model gets Kansas Coral Red Kansas leather seats and aluminum decorative trim.

The Z4 Silver Top is offered exclusively in sDrive23i guise, which translates to a 2.5-liter straight-six with 204-horsepower and 250Nm of torque, linked to a 6-speed automatic transmission.

Only 15 cars are scheduled for production, with prices set at 5,590,000 Yen (about US$68,900 at today's exchange rates).

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BMW Recalling 151,000 Vehicles in the U.S. to Repair Fuel Pumps

BMW's North American division has issued two separate voluntary recalls of some 151,000 vehicles sold in the USA to fix fuel-pump defects that may reduce engine performance and in some models, even a loss of power assist for the steering and brakes.

The first recall concerns certain model year BMWs equipped with twin-turbo inline six-cylinder engines, including the MY2007-2010MY 335i, MY2008–2010 135i, 535i and X6 xDrive35i Sports Activity Coupes, and MY2009 – 2010 Z4 Roadster sDrive35i. The Bavarian company said approximately 130,000 vehicles are potentially affected from this recall with about 40,000 expected to require a new high pressure fuel pump.

"Symptoms include long-crank engine starting times along with the illumination of the "Service Engine Soon" light. In certain cases, the driver may experience reduced engine performance in a Safe Mode accompanied by a tone and the illumination of the "Engine Malfunction" light," BMW said in a statement.

According to the company, the recall will entail replacement of the high-pressure fuel pump and/or a software update.

The second recall from BMW affects a total of 20,800 MY 2008 X5 Sports Activity Vehicles equipped with normally-aspirated inline six-cylinder engines to replace the low-pressure fuel pump.

BMW said that in this case, if the fuel-pump experiences a failure, "the engine will stop running and the driver will lose power assist for the steering and brakes although both the steering and the brakes remain operational."

For more information on the recall, owners of the affected models can contact BMW Customer Relations at 1-800-563-4269 or email CustomerRelations [at] bmwusa.com.

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