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BMW M5 - G-Power Hurricane

The fastest street-legal BMW

Jan 2, 2008

German tuner G-Power claims to have built the world's fastest and most powerful street-legal BMW. The 211mph Hurricane is based on the latest BMW M5. At the heart of the high-performance sedan is a 5.0 V10 engine with G-Power Evo II supercharger system that reportedly delivers 730hp.

Eurp_0801_z+gpower_bmw_m5+driveby Photo 1/2   |   BMW M5 - G-Power Hurricane

To achieve the 223hp increase G-Power, in cooperation with ASA Automotive, developed a system that uses one belt-driven ASA T1-12 compressor for each cylinder bank. Contrary to conventional mechanical chargers that waste a large portion of the additional power on driving themselves, the ASA compressor has an efficiency rating of up to 80%. The ASA charger is also small, which allows G-Power to install two of them in the tight confines of the M5 engine bay. The compressors are designed for even higher power output but the boost pressure is limited to 0.5bar (7.5psi).

The pre-compressed charge air is cooled in a highly efficient dual-flow water-to-air intercooler system that's mounted above the engine. This optimizes power and, in combination with a larger water-cooled oil cooler with pressure reservoir, it ensures the engine's thermal health. Specially developed mapping for engine electronics and the SMG gearbox coordinate the perfect interaction of the new components.

Eurp_0801_z+gpower_bmw_m5+engine Photo 2/2   |   BMW M5 - G-Power Hurricane

The inner workings of the four-valve ten-cylinder engine are optimized for even higher engine speeds with lightweight, precision-matched high-performance forged Mahle pistons. The supercharged V10 engine produces its 730hp between 7500 and 8200rpm. The high efficiency rate of the two superchargers, each spinning at up to 100,000rpm, results in a torque curve that rises early and by 3800rpm has already surpassed the production engine's peak torque of 384 lb-ft (delivered at 6000rpm). The new peak of 516 lb-ft is reached at 7200rpm. Acceleration benefits accordingly. With a sprint time from rest to 62mph of 4.2sec, the two-ton sedan beats its production counterpart by half a second. With approximately 10sec to 124mph, the advantage grows to 5seco. The 180mph barrier is shattered in less than 29.5sec.

Contrary to the production car the Hurricane is not limited to a top speed of 155mph. Aided by the specially cooled G-Power anti-slip differential, the engine propels the car to a top speed of 211mph.

The enormous performance places extreme demands on aerodynamics, tires, suspension and brakes. So the G-Power front apron is available in lightweight carbon fiber. Its large air inlets provide optimal cooling air for all radiators and the front brakes. At the same time, the spoiler minimizes lift on the front axle at high speeds.

The G-Power side sills smooth the airflow between the wheel housings and give the M5 a sleeker appearance. Rear axle lift is reduced by a trunk spoiler and a carbon fiber rear diffuser on the G- rear apron.

The 21" G-Power Silverstone wheels fill the space beneath the wheel arches. They have brilliant-graphite coated centers, while the rims and spokes are polished. They are mounted in sizes 21x9.5" with 255/30 ZR 21 tires in the front and 21x10.5" wheels with 295/25 ZR 21 tires on the rear.

The large wheels make room for the G-Power high-performance brake system with six-piston fixed calipers and 400x36mm brake discs on the front. The M5 handling can be made sportier by installing the height-adjustable G-Power RS coilover suspension.

The G-Power Hurricane is available as a fully converted car starting at 240,000 Euros (about $350,000). Any existing M5 can also be upgraded with the G-Power twin-supercharger system, available for 89,000 Euros (about $130,000). The price includes all necessary modifications to suspension, brakes and wheels.

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