Tuned version of new Gullwing could have over 600bhp

AMG has kicked off development of a powered-up and pared- down version of its soon-to-be-launched SLS following an official green light from Mercedes-Benz chairman Dieter Zetsche.

The new German super-coupe, tentatively due to go into limited production in 2013, is planned to join an exclusive range of Mercedes-Benz performance cars wearing the AMG Black Series name at a price, Stuttgart insiders hint.

Read the first drive of the standard SLS

It will add at least 50 per cent to the standard SLS’s UK price of around £155k - a move that looks set to pitch it into direct competition with the recently upgraded Ferrari 599 GTB Fiorano fitted with Maranello’s latest handling package upgrades.

Describing the SLS AMG Black Series - plans for which have existed ever since a decision was made in 2006 to revive the Gullwing - Mercedes-Benz insiders have told Autocar it will be differentiated from the standard SLS in very much the same vain as the Chevrolet ZR1 is removed from the Chevrolet C06.

At the heart of the go-fast Gullwing is a reworked version of the SLS’s M159 engine. The 6.2-litre V8, already far removed from similar-sized and configured units found in other AMG models, kicks out 563bhp and 479lb ft of torque in standard guise.

For the SLS AMG Black Series, however, its reserves are set to be raised beyond 600bhp and 500lb ft through the inclusion of a larger air manifold, higher compression ratio, reprofiled camshafts and other unspecified tweaks.

“We’re not at the limit with what’s out there the moment. There’s still a good deal more to come from the engine,” says AMG engine boss Friedrich Eichler. “We’re saving the best until last.”

The uprated V8 will continue to place drive through the SLS’s seven-speed dual-clutch gearbox to the rear wheels, with a mechanical locking differential set to be included as part of the upgraded driveline package.

Despite running similar gearing, the added engine reserves, together with detailed aerodynamic tweaks and a 50kg reduction in kerb weight, promise to bring the 0-62mph time down from the standard car’s claimed 3.8sec to under 3.5sec, while raising top speed from 195mph to 208mph.

Greg Kable

Join our WhatsApp community and be the first to read about the latest news and reviews wowing the car world. Our community is the best, easiest and most direct place to tap into the minds of Autocar, and if you join you’ll also be treated to unique WhatsApp content. You can leave at any time after joining - check our full privacy policy here.

Join the debate

Comments
12
Add a comment…
JoeF 2 November 2009

Re: Merc plans SLS Black Series

“We’re not at the limit with what’s out there the moment. There’s still a good deal more to come from the engine,” says AMG engine boss Friedrich Eichler. “We’re saving the best until last.”

If i was spending £155k on a new supercar, id want the engine to be the best it could be. The idea of spending that amount of money on something the company was holding back on is aggravating.

Im thinking 100bhp/pl and upwards. Ferrari have 125bhp p/l out of the 458i! BMW even have 100bhp/pl out of diesels now..

Peter Cavellini 2 November 2009

Re: Merc plans SLS Black Series

Couldn't agree more , but it's not exactly ground breaking is it?, i mean Mclaren's new supercar, does it look like anything else?, no of course it doesn't, it's full of new ideas(to many to write about now), no, i just think the Merc's a tad too conservative, the rear reminds you of Lancia's and Alfa's from the 60's and layout wise which i think is the most condemming aspect, it reminds you of a Dodge Viper, Sorry Mercedes it's a 7/10 job, must try harder!

moe360 1 November 2009

Re: Merc plans SLS Black Series

This is one cool car, well done Merc. Why dont BMW make somthing like this instead of a million different versions of the 3 series ! we only need a 335D and M3 thank you please !