March 04 2013
Mercedes Launch SLS Black Series!
The SLS Black Series has benefited greatly from the existence of the SLS GT3 race car and SLS Electric Drive. Various lightweight components and construction solutions from both allow it to hit the scales 70kg below that of the SLS GT, at 1550kg.
Key among the developments brought to the Black Series model is a new carbonfibre torque tube, through which the propshaft runs. As well as being much lighter than the standard aluminium arrangement, it is also claimed to be significantly more rigid for greater structural integrity. The bulkhead behind the seats is also now made of carbonfibre, again increasing the overall stiffness.
The real showpiece, though, is the engine. The naturally aspirated 6.2-litre V8 adopts myriad detail changes, including revised valve gear with altered cam geometry and revised bucket tappets, a new intake system, reconfigured belt drive, optimised crank assembly and an entirely new water and oil cooling system.
Power increases by 59bhp to 622bhp, which trumps a Porsche 911 GT2 RS. Maximum power arrives 600rpm further up the rev range, at 8000rpm. Torque has been reduced by 11lb ft in the interests of low-end tractability, going from 479lb ft at 4750rpm to 468lb ft at 5500rpm.