Mercedes-AMG GT Black Series Tuning Guide — Best Setup for FH6

The AMG GT Black Series is the angriest Mercedes ever to leave Affalterbach. This is the car that held the Nurburgring production car lap record at 6:43.616 — and it did it with a front-mid-engined layout, rear-wheel drive, and a flat-plane-crank 4.0-litre V8 that sounds nothing like the cross-plane AMG V8s you are used to. The M178 LS2 engine in the Black Series ditches the traditional AMG rumble for a high-pitched, almost Ferrari-like shriek, because flat-plane crankshafts fire each cylinder bank evenly and rev faster. 730 horsepower, 800Nm of torque, and a 0-100km/h time of 3.2 seconds from a car that weighs 1,540kg — lighter than the GT R Pro it replaces, despite carrying more cooling, more aero, and more anger.

The chassis engineering is what makes the Black Series special. The engine is mounted entirely behind the front axle — that is what "front-mid" means — giving the car a 47:53 front-to-rear weight distribution. The double-wishbone suspension carries uniball joints instead of rubber bushings on the rear axle, which eliminates compliance and gives the driver direct feedback through the chassis. The active aero package includes a two-stage rear wing with an upper blade that adjusts electronically and a lower flap that deploys under braking as an air brake. The front splitter is manually adjustable with two positions — street and track — and in track mode it generates enough front downforce that the car corners with a neutrality that should not be possible in a front-engined car.

In FH6, this car is an S2-class track specialist that punches well above its PI rating. The front-mid layout gives it turn-in response that embarrasses most mid-engined cars, while the torque from the twin-turbo V8 pulls it out of corners with the kind of authority that makes the rear tyres beg for mercy. The tradeoff is weight — at 1,540kg it is heavier than the 765LT and you feel it under braking and in quick direction changes. My setup below focuses on controlling that mass through corners while keeping the rear end from becoming a smoke machine every time you touch the throttle. This is a Nurburgring car, and the tune is built to handle sustained high-speed cornering with the confidence the real car earned on the Green Hell.

Best Tuning Setup — S2 998 Track Build

Tire Pressure — 32.0/31.0 PSI

The Black Series carries 1,540kg on its tyres, which is 300kg more than a 765LT — that extra mass means more heat going into the rubber, and higher pressures help manage that thermal load over a full lap. 32 PSI front keeps the contact patch consistent under the heavy braking loads this car generates with its front weight bias under deceleration. The 31 rear is a touch softer because you need the rear contact patch to expand slightly under acceleration squat to put down 800Nm without wheelspin. If you are running on a cold track or in rain, drop both ends by 1.5 PSI to get temperature into the tyres faster.

Final Drive — 3.60

The AMG GT Black Series comes with a 7-speed DCT that is tightly stacked in the lower gears, and the stock final drive is already decent for circuit work. A 3.60 ratio tightens it further — you get slightly shorter gearing across the board, which means you are in the power band (5,500-7,200 RPM) more consistently. Third gear through the technical sections and fourth gear through medium-speed sweepers both sit right in the torque plateau. The cost is a lower top speed — you will cap out around 330km/h — but on any circuit with corners, you are never hitting the limiter anyway, and the acceleration advantage out of every corner exit is worth more than theoretical top-end you cannot use.

Camber — -2.6 Front / -2.2 Rear

The Black Series's front tyres do a lot of work — they handle turn-in, they carry the braking load, and on a front-mid car with 47:53 weight distribution, the front axle shoulders more cornering responsibility than on a mid-engined car. -2.6 degrees up front keeps the outside tyre's contact patch maximised when loaded in a corner, which is essential for getting this 1,540kg car to change direction sharply. The -2.2 rear gives enough lateral grip to keep the rear planted through sweepers without the straight-line traction penalty that comes from tilting the driven tyres too far off the road surface. This is a balanced split for a balanced chassis.

Anti-Roll Bars — 34 Front / 32 Rear

A front-mid-engined car with a long hood needs more front ARB than you might expect. 34 up front resists the initial body roll that comes from having the engine mass sitting behind the front axle but still forward of the cabin — the car wants to roll onto the outside front tyre, and a stiff front bar counters that tendency. 32 at the rear is slightly softer to allow some weight transfer to the driven wheels under corner exit throttle application. The small front-to-rear stagger creates a mild understeer bias on corner entry that transitions to neutral mid-corner — exactly what you want for a car that will bite you with power oversteer if you are too aggressive.

Springs — 800 Front / 740 Rear (lb/in)

The Black Series is heavy enough that you need real spring rate to manage the mass. 800lb front springs control the nose under braking — the car dives forward significantly on the stock springs, and that pitch movement delays your turn-in because the front tyres are still loading up while the rear is unloading. 800lb keeps the platform flat. The 740 rear is softer by design: the rear needs to squat under acceleration to transfer weight onto the driven tyres, and if the rear springs are too stiff, you will spin the inside tyre on corner exit every single time. The 60lb stagger is the sweet spot between chassis control and mechanical grip.

Ride Height — 9.0 Front / 8.5 Rear

A moderate drop from stock with a half-inch forward rake. The front-mid layout means the engine mass sits low and far back, so you can run a slightly lower front ride height without bottoming out the undertray on braking. 9.0 front clears the kerbs at circuits like the Horizon Mexico circuit without scraping the splitter. The 8.5 rear tucks the diffuser closer to the ground for better underbody aero efficiency, and the rake angle shifts the aero balance slightly rearward at speed for stability in the 250km/h sweepers. This is a track ride height — do not take this setup off-road or through the city streets at these heights.

Rebound Damping — 9.0 Front / 8.5 Rear

A heavy car needs more rebound control than a light one. 9.0 front rebound ensures the nose does not bounce back up after compression — if the front end comes up too fast after hitting a kerb or a dip, you lose steering grip at exactly the moment you need it. The 8.5 rear keeps the back end settled over the same surface irregularities. The Black Series's real-world uniball suspension joints mean the chassis communicates every surface detail, and in-game you want the damping to work with that sharpness rather than numb it out. These rebound values preserve the car's direct, talkative feel while preventing oscillation.

Bump Damping — 6.0 Front / 5.5 Rear

Bump damping on the Black Series needs to be firm enough to handle kerb strikes without unsettling the car but soft enough to avoid making the ride punishing over a full race distance. 6.0 front lets the suspension absorb the impact when you cut the inside kerb without the steering wheel trying to jump out of your hands. 5.5 rear is slightly softer because the rear axle hits kerbs primarily on corner exit when you need the driven tyres to maintain contact. Too much bump stiffness at the rear and clipping a kerb under power will send the car sideways — the softer rear bump value keeps the tyres digging in rather than skipping over the surface.

Aero — Rear Wing 90%

The Black Series's two-stage active wing is a major part of why it held the Nurburgring record, and in FH6 the aero model respects that. 90% wing downforce gives you the rear-end stability that a front-engined, RWD, 730hp car desperately needs in high-speed corners. At 90%, the rear stays glued to the road through the Carretera Chase section at speeds that would have the rear end wandering at 70%. The 10% you leave on the table in drag penalty is worth it — above 90% the drag cost starts outweighing the grip benefit, and the car feels sluggish on the straights without a meaningful improvement in cornering speed.

Brake Balance — 52% Front / 120% Pressure

Front-mid weight distribution means more mass sits over the front axle than in a true mid-engined car, so you can run slightly more front brake bias — 52% — without the rear going light. This keeps the car stable under hard braking and gives you predictable trail-braking rotation without the rear stepping out. 120% pressure is the maximum I recommend before ABS intervention becomes intrusive. The carbon ceramics on the Black Series are some of the best in the business in real life, and in-game they respond well to high pressure — you get deep braking zones with consistent pedal feel throughout the stop.

Differential — Rear Accel 70% / Decel 45%

The Black Series's electronic limited-slip diff is tuned conservatively from the factory, and in FH6 that translates to a car that spins the inside rear tyre more than it should on corner exit. 70% acceleration lock forces both rear tyres to share the load under power, which is essential with 800Nm of turbo torque arriving in a rush. 45% decel lock is high enough to keep the rear stable when you lift off the throttle mid-corner — a common scenario in the Black Series where the front end grips so well that lifting suddenly can induce liftoff oversteer. The decel lock acts as a safety net, keeping the rear wheels rotating at similar speeds even when engine braking tries to lock the inside rear.

Class Comparison

Best Race Types

Tuning Share Codes

The Black Series has a dedicated tuning community because it sits in that sweet spot where it is competitive at S2 without being overpowered. I will post community share codes here as the best setups surface. If you have a tune that works particularly well on the Nurburgring layout or the Horizon Mexico circuit, share it and I will test it against this baseline build.

Common Tuning Mistakes

1. Building It Like a Mid-Engine Car

The Black Series has a front-mid layout, not a rear-mid layout, and the tune needs to reflect that. I constantly see people copying 765LT spring rates and camber values onto this car and wondering why it understeers. The weight is further forward, so you need more front spring rate, more front camber, and more front ARB than you would on a 720S or 765LT. Treat it like a front-engined car that happens to have excellent weight distribution, not like a mid-engined car with the engine in the wrong place.

2. Running Too Much Rear Wing

The Black Series comes with a massive two-stage wing that looks like it belongs on a GT3 race car, and the temptation is to crank it to 100%. At 100% the drag penalty is severe — you will lose 15-20km/h on the main straight of any circuit, and the cornering speed gain is marginal because the rear already has excellent mechanical grip from the chassis balance. 90% is the knee in the curve where the grip-to-drag ratio is optimal.

3. Neglecting the Final Drive

This is the most underrated change you can make to the Black Series. The stock gearing has third gear that is slightly too long for technical sections and fourth gear that falls just below the boost threshold on corner exit. A 3.60 final drive fixes both problems simultaneously. It is a five-second change in the tuning menu that transforms how the car accelerates out of corners — do not skip it.