The absolute pinnacle of the GT family: The new Mercedes-AMG GT Black Series
At Mercedes-AMG, the Black Series has been synonymous with a very special type of car since 2006: uncompromisingly sporty, with an expressive design and the most consistent technology transfer from motorsport to series production. The AMG GT Black Series represents a new highlight in this tradition: It is the most powerful Mercedes-AMG with a V8 series engine and can thus be individually adapted to the special conditions of various race tracks in a more versatile way than ever before.
The specifications were clear: Significantly more power than the previous flagship model of the AMG GT family, an even more agile throttle response, maximum torque - all of which meant that a radical change was needed in the form of a new, 'flat' crankshaft.
Different designs of V8 engines
The design of a V8 engine gives designers plenty of room to play with in one key element: the crank arrangement on the crankshaft. There are usually two variants in V8 engines: the 'cross plane' where the crankpins of the four pairs of cylinders are at 90-degree angles to each other, which AMG has used in all previous V8 engines, or the 'flat crankshaft', where all crankpins are on the same plane with a 180-degree offset ('flat plane').
If you look at the front of a cross-plane crankshaft, you will be able to identify the cross that gives it its name. The characteristic sound is another hallmark feature of the cross-plane V8 engine.
Uniformly oscillating gas columns for even more power
Another way of increasing performance is by using a 'flat' crankshaft. In the flat-plane V8 engine, it looks like an inline four-cylinder model – except for the wider crankpins, which have two connecting rods each in the V8. Ignition in the flat-plane V8 jumps from one cylinder bank to the next, which further improves the gas cycle.
The most powerful V8 series engine from Mercedes-AMG
The new GT Black Series engine is based on the AMG 4.0-litre V8 biturbo engine with dry sump lubrication, but it has been given the new internal code M178 LS2 due to the numerous modifications.
Both twin scroll exhaust turbochargers are mounted in anti-friction bearings, as in the top-of-the-range four-door AMG GT Coupé, which optimises their throttle response even further. However, in the Black Series, the turbochargers have been given a larger compressor wheel, meaning that both can deliver a total of 1100 kg air per hour. By way of comparison: The figure is 900 kg/h for the AMG GT R. The unique standing of the new engine is also reflected in the engine badge, which is kept in black.
0-200 km/h in under nine seconds
What does the engine do for the AMG GT Black Series? And it enables highly impressive driving performance: the two-door vehicle shoots from 0 to 100 km/h in 3.2 seconds, and to 200 km/h in under nine seconds. The top speed is 325 km/h, although only on cordoned-off racetracks.
Modified AMG SPEEDSHIFT DCT 7G transmission
Power is transmitted to the rear wheels via the seven-speed AMG SPEEDSHIFT DCT 7G dual clutch transmission, which is located on the rear axle in a transaxle arrangement for optimal weight distribution, as is the case for all AMG GT models. It has been modified for use in the AMG GT Black Series and adapted to the increased torque of 800 Nm. The previous limits governing shift performance and response time have been extended, making them more suitable for racetracks.
The Race Start function is also now even more impressive, thanks to the increased starting revs, the more sensitive wheel slip control and the sports tyres fit for the racetrack.
Sophisticated aerodynamics for incredibly high driving dynamics
It starts already with the new, significantly larger cooling air inlet grille, which stems directly from the AMG GT3 racing car. Because the wheel arch coolers are now also supplied with air directly via the central intake, there is no longer a need for the two additional outer air inlets in the front apron. Sickle-shaped flics optimise the flow of air here, which not only increases downforce at the front axle, but also improves brake cooling. The 'air curtains' control and direct the flow towards the wheels. Together with the flics in front of the wheels, this serves to reduce the drag coefficient and increase downforce. The new design language therefore combines maximum cool air efficiency with lower air resistance and an increased level of downforce at the front.
Oct 07, 2020 at 04:05