Sim Doctor Tuning Handbook

Gran Turismo Setup Secrets

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Welcome to the world of Gran Turismo, where precision and mastery of the road define the path to victory. While driving skills are crucial, the art of tuning your virtual machine can make all the difference between conquering the track and being left in the dust.


In this comprehensive guide, we'll walk you through the essential steps of developing a setup sheet for various cars in the game. Whether you're a seasoned racer or just starting your GT journey, understanding the intricacies of car setup can significantly enhance your performance.


We've distilled years of technical knowledge and real-world tuning principles into a practical, easy-to-follow structure. From adjusting spring rates to fine-tuning gear ratios, we'll cover it all. By the end, you'll be armed with the knowledge to turn any vehicle into a high-performance racing machine tailored to your driving style.



When starting a tune from scratch it is important to go through the following steps


  • Weight, Power and Aerodynamics to the entry requirements/PP with all the parts you’d like on the car,


  • Tune the Gearbox to the Power and Top Speed required for the track,


  • Set LSD settings to 30/30/30(Somewhere in the middle),


  • Adjust the Suspension settings as per the car’s feel based off of test laps with the guide below,


  • Adjust the LSD to get the refinement in your setup.



This process unfortunately means you need to have a practice session, drive a lap or two, take the feedback from the car and make small adjustments and repeat the process.

Hopefully with the guide below it will help you make the right changes to get to the setup you like as soon as possible.

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Finding the correct gear ratios and final drive based on the power visual graph in game.

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Aerodynamics allows you to adjust downforce (the pressure the car exerts onto the track surface), thus increasing tyre grip, allowing you to take corners at higher speeds.

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Ride Height

Lowering a car decreases the chance of rollover for better handling.

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Natural Frequency (Springs)

When tuning your car, adjusting the spring rates is a critical aspect to address issues related to oversteer or understeer.

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Dampers are split into two sections, Compression and Expansion as they control the speed of the Damper in two directions.

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Anti-Roll Bar

Anti-Roll Bars connect the left and right wheels on the front or the rear of a car with the intent to reduce the amount of the car’s body will encounter with momentum going through a corner.

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Negative Camber Angle

The negative camber angle adjusts the degree to which the bottoms of the wheels are wider apart than the top.

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Toe Angle

The alignment of your vehicle's tires plays an important role in maintaining control and stability, with factors such as turning radius and tire slip angles.

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Set up acceleration and braking first to get the car to your liking, then use initial to fine tune the overall effect/engagement of the Braking and Acceleration Sensitivity portions of the LSD