G-Power unleashes 640bhp BMW M5

It's customary to start any article about the tuning of an already very powerful car thus:

"[Very powerful car] not fast enough for you? Well, the [obscure tuner] version of [very fast car] should be right up your chuffing street. The [obscure tuner] [very fast car] has more power than a [Porsche 911/Ferrari 458/Lamborghini Gallardo]!"
It's what you do when you can't muster up enough enthusiasm for yet another irrelevant special interest car to think of something interesting.

not fast enough for you? Well, the G-Power version of the BMW M5 should be right up your chuffing street. The G-Power M5 has more power than a Ferrari 458!

Called the G-Power Bi-Tronik III, the German tuner's overhaul of the M5 takes the 4.4-litre twin-turbo V8 up to 631bhp, up from 552. It means the car will hit 62mph in 3.9 seconds and keep going until it hits near enough 200mph.

G-Power's press release is baffling to say the least. Here's how the company says it has achieved the horsepower gains:

"In order to implement this target the G-POWER engineering department has transferred its experience from the area of supercharging to the turbocharged BMW 4.4l V8 engine. After all, the ASA supercharger used for the G-POWER supercharger systems is closely related to the turbochargers featured by BMW, since both units us a centrifugal compressor to build up boost.

" The basis for the electronic output increase is the fact that G-POWER, in contrast to the manufacturer, does not use standard software full of compromises but an individual solution for the engine. Among others, the parameters for the amount of fuel and the ignition timing are modified depending on the product variance of the engine. Furthermore the boost level is moderately increased, as well. "

That's that, then.

The standard exhaust is replaced with a louder stainless steel system, and the transmission's software is re-programmed to limit torque during gear changes, reducing stress through the drivetrain.

The power gets to the road through 21-inch forged alloy wheels with Michelin Pilot Supersport Tyres, and stopping is accomplished by a set of uprated G-Power carbon ceramic brakes, which are about half the weight of the regular ones.

No word on price, but if you have to...never mind.
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