CarX Builder
C4

Track · AWD

Track awd build

LMA (Lamborghini Aventador S)

by Kelss1k · published on 28/09/2026 · 8 views

Use as a base

516

Power

1725

Weight

213

Max speed (aero drag)

Spec sheet

Installed parts

Engine

53L

  • Fuel system EFS1 Street

Gearbox

T50S

  • Gearbox GBT5 Ultimate
  • Clutch CLH60 Ultimate
  • Differential Clutch 65 Ultimate
  • Drivetrain AWD Ultimate

Body

CBW

  • Front aero Front aero ST5 Ultimate
  • Rear aero Rear aero ST5 Ultimate

Suspension

  • Front springs F_SS -60 Ultimate
  • Rear springs R_SS -60 Ultimate
  • Front shocks F_S5 Hard Ultimate
  • Rear shocks R_S5 Hard Ultimate
  • Front anti-roll bar F_SB +200 Ultimate
  • Rear anti-roll bar R_SB +200 Ultimate
  • Front arms F_ARM5 Ultimate
  • Rear arms R_ARM5 Ultimate
  • Brakes BR [P] Prototype

Wheels

  • Front rims 285/25 R21 Ultimate
  • Rear rims 345/25 R21 Ultimate
  • Front tires Racing -5 Racing
  • Rear tires Racing -5 Racing
  • Front spacers W +0.1 Ultimate
  • Rear spacers W +0.1 Ultimate
01

Transmission

Final drive 4.754
Gear 1 4.06
Gear 2 2.3
Gear 3 1.6
Gear 4 1.25
Gear 5 1
Gear 6 0.8

Gearbox: T50S (declared by you, in the form or when sharing).

Your gearbox ratios are kept and only the final drive is adjusted, so the last gear reaches top speed at the top of the power band. This is not an optimal gearing: in our simulations on the game's tracks, no other rule does demonstrably better, whatever the discipline. Not validated in game.

Gearbox recalculated on 2026-09-25: corner exit speed and target top speed are no longer used, and the final drive stays within the game's slider range. The proposed ratios, and the differential that depends on them, may differ from those shown before.

These ratios can only be adjusted in game with a Racing or higher gearbox upgrade (GBT3 and up). That part's final drive factor is not applied: the tool doesn't know which one is installed.

02

Differential

Front

Accel lock 0.3
Decel lock 0
Preload 19Nm

Physics-based target value, not capped to the real max achievable in-game (which depends on your installed differential). Get as close as you can without forcing past the slider's limit.

Rear

Accel lock 0.56
Decel lock 0.3
Preload 38Nm

Physics-based target value, not capped to the real max achievable in-game (which depends on your installed differential). Get as close as you can without forcing past the slider's limit.

Differential: Clutch 65 (declared).

Acceleration lock (rear): the minimum so the inner wheel does not spin alone out of corners. You can raise it without losing traction: the car then slides more progressively, but it understeers more on throttle, especially if you go much higher (in-game hint). Approximate calculation, about ±0.1.

Coast lock, preload and front axle: reference values (tuning choices, not a calculation from your car). At the front: little lock and no coast lock (1-way), so the car turns in well. Not validated in game.

03

Suspension

Front

Stiffness 246.5kNm
Anti-roll bar 67.4kNm
Slow bump 13100
Fast bump 6500
Slow rebound 29400
Fast rebound 14700

Rear

Stiffness 323.9kNm
Anti-roll bar 81.9kNm
Slow bump 17200
Fast bump 8600
Slow rebound 38700
Fast rebound 19300
04

Steering, camber & toe

Caster 4.58°
Steering angle 50.65°
Ackermann 54.08%
Braking 53.9% AV
Front camber -5.44°
Rear camber -5.26°
Front toe -0.066°
Rear toe 0.115°
Calculation details & input data

Theoretical top speed

213.3 kph

Max speed (aero drag)

213.3 kph

Powerband

7228 → 8381 rpm

Gear 123456
Top speed per gear (km/h) 61108155198213213
Power
516 hp
Weight
1725 kg
Class
C4 (299.1 HP/t)
Front balance
43 %
Rev limiter (rpm)
8500
Wheelbase (m)
2.67 m
Center of mass height (inches)
9.6 inches
Front
285/25 R21 · 1.08
Rear
385/25 R21 · 1.08
Front/rear frequencies
4 / 4 Hz
Target roll gradient
0.05°/g · TLLTD 45.2 %
Curves extracted from the screenshot

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