Top Speed After Tuning

[MarioVX]

Hi,

could someone explain please how a car's top speed is determined after applying a certain tuning kit?

I know a (base) car's top speed can be found readily inside the CAR_PHYSICS_DATA table as Top_Speed_kmh.

CAR_PACKS links cars with tuning kits and contains for each link override values for acceleration, braking distance and handling - but not for top speed.

The tuning kits themselves, defined in AFTER_MARKET_PACKS, are not car-specific and have the following properties:

• Speed_ratio
• Power_ratio
• Acceleration_ratio
• Free_ratio
• CX_ratio
• Weight_ratio
• Suspension_ratio
• Braking_ratio

The table definition suggests all these can be decimal, although all but power ratio happen to be integers, some negative.

My question is: how can I calculate the resulting top speed when applying such a pack to an applicable car?

The Top_Speed_kmh field of a car's physics data is in TDUF Database Editor located inside the Tuning tab, which isn't a real tab in the database itself, but it suggests the tuning relevant parameters might be contained to this tab. For completeness, these are:

• Gravity_Center_Length
• Gravity_Center_Height
• Drag force
• Downforce
• Top_Speed_kmh
• coef_grip
• coef_overturning
• coef_accel
• coef_brake
• BrakingDist
• Handling
• coef_suspension
• coef_sharpness

Which of these combine with which fields from the after pack in what way to update the top speed?

Thank you in advance for any insights!

[andrey zyb]

3 hours ago, MarioVX said:

Hi,

could someone explain please how a car's top speed is determined after applying a certain tuning kit?

I know a (base) car's top speed can be found readily inside the CAR_PHYSICS_DATA table as Top_Speed_kmh.

CAR_PACKS links cars with tuning kits and contains for each link override values for acceleration, braking distance and handling - but not for top speed.

The tuning kits themselves, defined in AFTER_MARKET_PACKS, are not car-specific and have the following properties:

• Speed_ratio
• Power_ratio
• Acceleration_ratio
• Free_ratio
• CX_ratio
• Weight_ratio
• Suspension_ratio
• Braking_ratio

The table definition suggests all these can be decimal, although all but power ratio happen to be integers, some negative.

My question is: how can I calculate the resulting top speed when applying such a pack to an applicable car?

The Top_Speed_kmh field of a car's physics data is in TDUF Database Editor located inside the Tuning tab, which isn't a real tab in the database itself, but it suggests the tuning relevant parameters might be contained to this tab. For completeness, these are:

• Gravity_Center_Length
• Gravity_Center_Height
• Drag force
• Downforce
• Top_Speed_kmh
• coef_grip
• coef_overturning
• coef_accel
• coef_brake
• BrakingDist
• Handling
• coef_suspension
• coef_sharpness

Which of these combine with which fields from the after pack in what way to update the top speed?

Thank you in advance for any insights!

It seems that in the game, the maximum speed is closely related to acceleration and handling, meaning that the car should accelerate well and still turn well at high speeds, similar to the BMW M3 E46 GTR.