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Old 10-28-2009, 01:13 PM   #1
AVANTI R5
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Default BMW Builds An M5 CSL

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BMW’s M division has built a special lightweight one-off version of the E60 M5 as part of the 25th anniversary celebrations for the iconic four door saloon.

Revealed this morning at BMW’s prototype workshop at the Nurburgring in Germany, the celebratory M5 is described by M division’s head of development, Albert Biermann, as “the M5 CSL we never built”.

Among the changes brought to the new car is a heavily modified version of the standard M5’s 5.0-litre V10 engine. The highly strung, 90-degree unit has been enlarged with a longer stroke taking its capacity up to 5.5-litres, making it the largest engine to ever feature in an official M-car.

Also included as part of the engine overhaul is a carbonfibre manifold boasting a increased capacity air box and a secondary oil cooler – the latter requiring modifications to the front bumper, which gains an additional air duct in the place usually dedicated to the license plate.

Official power and torque figures have not been released but Biermann hints the output peaks at “around 580bhp and close to 400lb ft”. That’s up from 407bhp and 348lb ft with the standard M5.

Channelling the added reserves back to the rear wheels is a beefed up version of the M3’s seven-speed double clutch gearbox. The Getrag engineered unit, operated via steering wheel mounted paddles or push/pull gear lever, supplants the standard M5’s sequential seven speed manual unit, offering smoother and more rapid gear shifts.

Further changes centre around the body, which receives a carbonfibre roof as part of a weight saving program that has pared a claimed 50kg from the standard M5’s 1830kg kerb weight.

BMW’s M division has also stripped down the interior, doing away with the standard front seats in favour of two carbon fibre backed pews, while the rear seat has been ditched altogether.

In terms of its suspension the new M5 remains close to the standard specification. “We’ve altered the mapping of the variable dampers but the geometry remains the same,” says Biermann.

No performance claims have been made for the powered-up-and-pared-down M5, but Biermann says it is “comfortably faster the standard M5’s 4.1sec 0-100km/h”.

He also confirmed to Autocar that the new one-off M5 it has already lapped the Nurburgring in the hands of long-time BMW race driver, Claudia Huertgen, in under eight minutes, making it some 20sec faster around the legendary German circuit than the standard M5.

“It’s a lot gutsier than the standard M5,” says Huertgen, who this year drove the new Alpina M6 GT3 race car in the FIA sportscar championship. “You can sense the added drive out of corners. There’s more bottom end shove. I’m pulling over 180mph under the bridge at the Doettinger Hohe [teh fastest point of the track]."

Yet despite the investment that has gone into creating the new uber-M5, Biermann says it is destined to remain a one-off.

“Right now we’re concentrating on the next-generation M5. This car has been fun to develop but there are no plans for production,” he says
http://www.autocar.co.uk/News/NewsAr...Series/244413/



























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Old 10-28-2009, 01:28 PM   #2
mhoward1
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Nice exercise, but it will be interesting to see where the next M5 goes with BMW's new engine philosophy.
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Old 10-28-2009, 01:55 PM   #3
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Lightweight version of basically a 4,000lb car. Why even bother.

I still want it...a lot!! *drool*
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Old 10-28-2009, 03:12 PM   #4
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Im going to probably go against popular opinion and say a stripped out M5 with racing buckets and no back seat is not really that cool or impressive. Strip away 100 kg or so and its still a very heavy car and whats the point of a lightweight high performance race-prepped exec sedan aside from doing it as 'an engineering exercise'. Basically aside from the larger engine, a CSL concept should only be applied to an M3 coupe.

Cars like the M5 should be fast but also luxurious GT cruisers, quiet and elegant. Not a noisy, stripped out track special. I do like the 5.5L engine tho.
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Old 10-28-2009, 08:45 PM   #5
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is that a child driving?
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Old 10-29-2009, 03:21 PM   #6
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Quote:
Originally Posted by 4wdwrx View Post
is that a child driving?
I was about to say, what's with the tiny driver.

Must be part of the weight savings.
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Old 10-29-2009, 03:44 PM   #7
4S-TURBO
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It's 'Shortround'..."I get you there faster, Dr. Jones!"
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Old 10-29-2009, 03:46 PM   #8
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The person driving it looks like a 12 year old.... wtf?
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Old 10-29-2009, 03:54 PM   #9
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This article has "teh uber"

[teh fastest point of the track]."
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Old 10-29-2009, 04:25 PM   #10
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Elvis is riding shot gun:

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