Mercedes AMG GT4

Know everything about iRacing's Mercedes AMG GT4 including technical specs, braking tips and more.

Mercedes AMG GT4 - GT4 race car

Image © iRacing.com Motorsport Simulations

Chassis

Weight 3276 lbs
Drive RWD

Power

Engine 4.0 Liters
Power 460 bhp
Torque 425 lb-ft

Brakes

Type Manual Bias
Pad Compounds 3 Compounds
Electronics ABS Available

Bias Range

Adjustable

ABS

ABS Available

Downforce

Medium

Setup

Advanced

How the Mercedes AMG GT4 Handles Braking

The Mercedes AMG GT4 features a sophisticated braking system with adjustable brake bias, three brake pad compounds, and a 12-position ABS system. Brake bias can be adjusted on-the-fly to shift braking balance forward or rearward—values above 50% increase front brake pressure, improving stability but raising the risk of front lockups. The brake pad compound selection offers a critical tradeoff: Low compound provides maximum modulation with reduced stopping power, while Medium and High compounds deliver stronger braking at the cost of pedal feel and control.

The ABS system's baseline setting is position 4, offering a balanced starting point for most conditions. Lower numbers increase intervention to prevent lockups but may extend braking distances, while higher numbers reduce assistance for more direct pedal response. Position 12 disables ABS entirely for experienced drivers seeking maximum control. Understanding this relationship helps you tailor braking behavior to track grip levels and personal preference.

Braking performance is also influenced by suspension setup—front camber increases cornering grip but reduces longitudinal braking traction, requiring rearward brake bias compensation. Damper settings affect weight transfer speed during braking, with higher rebound stiffness helping control pitch and improve stability in heavy braking zones. Monitor tire temperatures and wear patterns to validate your brake bias and suspension choices across different circuit demands.

Grounded in official iRacing manual data
Practice in the App

Stop Guessing, Start Improving

Many drivers slam the brakes with all their strength, but the fastest modulate pressure, use the brake to rotate the car, and exit as fast as possible. Train that skill here.

Train Anywhere, Anytime

Browser-based training works with any racing pedals or controllers. Fanatec, Thrustmaster, Logitech, Simucube — no installation required.

Pro-Designed Exercises

Access exercises created by professional sim racers like Suellio Almeida. Learn the exact braking patterns used by the fastest drivers.

Import Mercedes AMG GT4 Telemetry

Drop your Garage61 lap CSV and extract braking data for every corner. Generate personalized practice exercises based on YOUR telemetry, not generic patterns.

Track Your Progress

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And There's Much More

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3 Essential Setup Tips

Tip 1

Brake Bias

Brake bias controls front/rear brake force distribution. Start with 56-58% front for most cars. Engine placement matters: front-engine cars need more front bias (58-62%), mid-engine cars run balanced (54-58%), rear-engine cars need less (50-54%). Understeering under braking? Add 1-2% front bias. Rear feels loose in braking zones? Reduce front bias by 1-2%.

Tip 2

Know Your Car

Check if your car has ABS, traction control, or brake mapping. ABS allows later braking but can increase stopping distance—adjust activation threshold in setup. High-downforce cars brake later and harder at speed but lose grip quickly as downforce bleeds off. Low-downforce cars require earlier, progressive braking with more trail-braking to rotate.

Tip 3

Quick Fixes

Locking fronts frequently? Reduce front bias 1-2% or brake earlier with gradual pressure. Car won't turn in under braking? Increase front bias 1% and practice trail-braking deeper into corners. Rear unstable in braking zones? Reduce rear bias or use smoother pedal release.

Master Your Braking

Common questions about braking in this car. Practice these techniques in our free app.

What's the best brake bias for the Mercedes AMG GT4?
Most cars work well starting with 56-58% front bias. Adjust based on behavior: if you're locking fronts frequently, reduce front bias by 1-2%. If the rear feels unstable under braking, increase front bias. Engine placement matters too—front-engine cars typically need more front bias (58-62%), while mid/rear-engine cars run more balanced (54-58%). Always adjust in small increments and test.

Does the Mercedes AMG GT4 have ABS or traction control?
Check your car's setup screen for available driver aids. Cars with ABS allow later, more aggressive braking but may increase stopping distances. If ABS is available, you can adjust its activation threshold in setup—higher thresholds give more control but require smoother inputs. Cars without ABS require progressive brake application to avoid lockups. Practice threshold braking in our app to develop the muscle memory for both scenarios.

Why do my brakes lock up in the Mercedes AMG GT4?
Brake lockups typically happen from: (1) Too much front brake bias—reduce by 1-2%. (2) Too aggressive initial brake application—practice progressive pressure buildup. (3) Trail-braking too deep into the corner—release brake pressure earlier. (4) Cold tires or brakes—take an extra warm-up lap. (5) Downforce loss at lower speeds—brake earlier and lighter through slow corners. Use our Hold Pressure and Threshold Braking exercises to build the sensitivity needed to stay just below the lockup point.

How late can I brake in the Mercedes AMG GT4 compared to similar cars?
Braking points depend on: (1) Downforce level—high-downforce cars brake 50-100ft later than low-downforce cars. (2) Weight—lighter cars brake later but have less grip margin. (3) Brake size and cooling—larger brakes handle repeated heavy braking better. (4) ABS availability—ABS cars can brake slightly later. Start conservative and move your braking point later by 5-10ft each lap until you find the limit. The key is consistency, not just maximum lateness.

How can I practice braking in the Mercedes AMG GT4?
Braking Lab offers free web-based exercises that work with any wheel/pedal setup—no download needed. Try Hold Pressure to develop steady brake application, Trail Braking to master corner entry, and Threshold Braking to find the lockup limit safely. Each exercise gives instant feedback and tracks your progress. Practice 10 minutes before your race session to build muscle memory that translates directly to the track.

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