The Open Racing Car Simulator Download

trb1 car4-trb1

Car 4 TRB1

A technical look at the in-simulator car: authored configuration, derived performance figures and default setup.

Front three-quarter view of Car 4 TRB1
Front three-quarter
Side view of Car 4 TRB1
Side
Rear three-quarter view of Car 4 TRB1
Rear three-quarter
Peak power
402 kW 539 hp at 8,000 rpm
Peak torque
515 N·m at 7,000 rpm
Mass incl. driver
1,150 kg excluding fuel
Power / mass
350 kW/t 469 hp/t
Fuel
95.0 L 95.0 L tank
Transmission
6 gears RWD
Top-gear limiter speed
316.6 km/h Theoretical gearing value, not a real top-speed claim

Engineering charts

Torque and power across engine speed Solid torque in newton metres on the left axis and dashed power in kilowatts on the right axis, plotted against revolutions per minute. 012925838651502,1254,2506,3758,500 0101201302402Power, kW Engine speed, rpm Torque, N·m TorquePower
Engine output Torque (Nm) Power (kW)
Engine chart data
RPMTorque (N·m)Power (kW)
1,400206.030.2
2,000230.048.2
3,000330.0103.7
4,000405.0169.6
5,000475.0248.7
6,000505.0317.3
7,000515.0377.5
8,000480.0402.1
8,500445.0396.1
Optimal shift envelope across road speed A prominent sawtooth line follows the calculated optimal shifts. Light dashed rays show each forward gear and a smooth root curve fits the engine-speed landing points after shifts. 02,1254,2506,3758,500079158237317 Road speed, km/h Engine speed, rpm
Gearing Optimal shift path Fitted n = a·v1/4.94 Individual gears

Shift points compare wheel torque before and after each upshift. The smooth root curve is a fitted reference through the post-shift RPM points, not an authored TORCS value. Speeds are theoretical gearing values, not measured top speeds.

Gearing chart data
GearRatioLimiter speed (km/h)Shift speed (km/h)Shift RPM
13.80090.090.08,500 to 6,263
22.800122.1122.18,500 to 5,616
31.850184.8184.88,500 to 6,662
41.450235.8235.88,500 to 7,328
51.250273.6273.68,500 to 7,344
61.080316.6Top gearNot applicable
Front tire normalized force versus slip ratio Front axle tire model force plotted against pure slip ratio in normalized units. -1.00-0.500.000.501.00-0.75-0.380.000.380.75 Longitudinal slip ratio Normalized force
Front tire, slip ratio, normalized force
Front tire slip ratio chart data
Slip ratioNormalized forceDisplayed force (normalized)
-0.750-0.889-0.889
-0.700-0.897-0.897
-0.650-0.905-0.905
-0.600-0.914-0.914
-0.550-0.924-0.924
-0.500-0.934-0.934
-0.450-0.945-0.945
-0.400-0.957-0.957
-0.350-0.969-0.969
-0.300-0.980-0.980
-0.250-0.991-0.991
-0.200-0.999-0.999
-0.150-0.997-0.997
-0.100-0.966-0.966
-0.050-0.802-0.802
0.0000.0000.000
0.0500.8020.802
0.1000.9660.966
0.1500.9970.997
0.2000.9990.999
0.2500.9910.991
0.3000.9800.980
0.3500.9690.969
0.4000.9570.957
0.4500.9450.945
0.5000.9340.934
0.5500.9240.924
0.6000.9140.914
0.6500.9050.905
0.7000.8970.897
0.7500.8890.889
Front tire static-load force versus slip ratio Front axle tire model force plotted against pure slip ratio in N units. -4,935-2,46802,4684,935-0.75-0.380.000.380.75 Longitudinal slip ratio Force, N
Front tire, slip ratio, static corner-load force
Front tire slip ratio chart data
Slip ratioNormalized forceDisplayed force (N)
-0.750-0.889-4,390
-0.700-0.897-4,428
-0.650-0.905-4,469
-0.600-0.914-4,513
-0.550-0.924-4,560
-0.500-0.934-4,611
-0.450-0.945-4,665
-0.400-0.957-4,721
-0.350-0.969-4,780
-0.300-0.980-4,839
-0.250-0.991-4,892
-0.200-0.999-4,930
-0.150-0.997-4,922
-0.100-0.966-4,769
-0.050-0.802-3,956
0.0000.0000
0.0500.8023,956
0.1000.9664,769
0.1500.9974,922
0.2000.9994,930
0.2500.9914,892
0.3000.9804,839
0.3500.9694,780
0.4000.9574,721
0.4500.9454,665
0.5000.9344,611
0.5500.9244,560
0.6000.9144,513
0.6500.9054,469
0.7000.8974,428
0.7500.8894,390
Front tire normalized force versus slip angle Front axle tire model force plotted against pure slip angle in normalized units. -1.00-0.500.000.501.00-30-1501530 Slip angle, ° Normalized force
Front tire, slip angle, normalized force
Front tire slip angle chart data
Slip angle (°)Normalized forceDisplayed force (normalized)
-30.0-0.934-0.934
-27.5-0.943-0.943
-25.0-0.951-0.951
-22.5-0.961-0.961
-20.0-0.970-0.970
-17.5-0.980-0.980
-15.0-0.990-0.990
-12.5-0.997-0.997
-10.0-1.000-1.000
-7.5-0.991-0.991
-5.0-0.946-0.946
-2.5-0.752-0.752
0.00.0000.000
2.50.7520.752
5.00.9460.946
7.50.9910.991
10.01.0001.000
12.50.9970.997
15.00.9900.990
17.50.9800.980
20.00.9700.970
22.50.9610.961
25.00.9510.951
27.50.9430.943
30.00.9340.934
Front tire static-load force versus slip angle Front axle tire model force plotted against pure slip angle in N units. -4,935-2,46802,4684,935-30-1501530 Slip angle, ° Force, N
Front tire, slip angle, static corner-load force
Front tire slip angle chart data
Slip angle (°)Normalized forceDisplayed force (N)
-30.0-0.934-4,611
-27.5-0.943-4,652
-25.0-0.951-4,695
-22.5-0.961-4,742
-20.0-0.970-4,790
-17.5-0.980-4,838
-15.0-0.990-4,884
-12.5-0.997-4,921
-10.0-1.000-4,935
-7.5-0.991-4,891
-5.0-0.946-4,669
-2.5-0.752-3,710
0.00.0000
2.50.7523,710
5.00.9464,669
7.50.9914,891
10.01.0004,935
12.50.9974,921
15.00.9904,884
17.50.9804,838
20.00.9704,790
22.50.9614,742
25.00.9514,695
27.50.9434,652
30.00.9344,611
Rear tire normalized force versus slip ratio Rear axle tire model force plotted against pure slip ratio in normalized units. -1.00-0.500.000.501.00-0.75-0.380.000.380.75 Longitudinal slip ratio Normalized force
Rear tire, slip ratio, normalized force
Rear tire slip ratio chart data
Slip ratioNormalized forceDisplayed force (normalized)
-0.750-0.889-0.889
-0.700-0.897-0.897
-0.650-0.905-0.905
-0.600-0.914-0.914
-0.550-0.924-0.924
-0.500-0.934-0.934
-0.450-0.945-0.945
-0.400-0.957-0.957
-0.350-0.969-0.969
-0.300-0.980-0.980
-0.250-0.991-0.991
-0.200-0.999-0.999
-0.150-0.997-0.997
-0.100-0.966-0.966
-0.050-0.802-0.802
0.0000.0000.000
0.0500.8020.802
0.1000.9660.966
0.1500.9970.997
0.2000.9990.999
0.2500.9910.991
0.3000.9800.980
0.3500.9690.969
0.4000.9570.957
0.4500.9450.945
0.5000.9340.934
0.5500.9240.924
0.6000.9140.914
0.6500.9050.905
0.7000.8970.897
0.7500.8890.889
Rear tire static-load force versus slip ratio Rear axle tire model force plotted against pure slip ratio in N units. -4,556-2,27802,2784,556-0.75-0.380.000.380.75 Longitudinal slip ratio Force, N
Rear tire, slip ratio, static corner-load force
Rear tire slip ratio chart data
Slip ratioNormalized forceDisplayed force (N)
-0.750-0.889-4,052
-0.700-0.897-4,087
-0.650-0.905-4,125
-0.600-0.914-4,166
-0.550-0.924-4,209
-0.500-0.934-4,256
-0.450-0.945-4,306
-0.400-0.957-4,358
-0.350-0.969-4,412
-0.300-0.980-4,466
-0.250-0.991-4,516
-0.200-0.999-4,551
-0.150-0.997-4,544
-0.100-0.966-4,402
-0.050-0.802-3,652
0.0000.0000
0.0500.8023,652
0.1000.9664,402
0.1500.9974,544
0.2000.9994,551
0.2500.9914,516
0.3000.9804,466
0.3500.9694,412
0.4000.9574,358
0.4500.9454,306
0.5000.9344,256
0.5500.9244,209
0.6000.9144,166
0.6500.9054,125
0.7000.8974,087
0.7500.8894,052
Rear tire normalized force versus slip angle Rear axle tire model force plotted against pure slip angle in normalized units. -1.00-0.500.000.501.00-30-1501530 Slip angle, ° Normalized force
Rear tire, slip angle, normalized force
Rear tire slip angle chart data
Slip angle (°)Normalized forceDisplayed force (normalized)
-30.0-0.934-0.934
-27.5-0.943-0.943
-25.0-0.951-0.951
-22.5-0.961-0.961
-20.0-0.970-0.970
-17.5-0.980-0.980
-15.0-0.990-0.990
-12.5-0.997-0.997
-10.0-1.000-1.000
-7.5-0.991-0.991
-5.0-0.946-0.946
-2.5-0.752-0.752
0.00.0000.000
2.50.7520.752
5.00.9460.946
7.50.9910.991
10.01.0001.000
12.50.9970.997
15.00.9900.990
17.50.9800.980
20.00.9700.970
22.50.9610.961
25.00.9510.951
27.50.9430.943
30.00.9340.934
Rear tire static-load force versus slip angle Rear axle tire model force plotted against pure slip angle in N units. -4,556-2,27802,2784,556-30-1501530 Slip angle, ° Force, N
Rear tire, slip angle, static corner-load force
Rear tire slip angle chart data
Slip angle (°)Normalized forceDisplayed force (N)
-30.0-0.934-4,256
-27.5-0.943-4,294
-25.0-0.951-4,334
-22.5-0.961-4,377
-20.0-0.970-4,421
-17.5-0.980-4,466
-15.0-0.990-4,508
-12.5-0.997-4,542
-10.0-1.000-4,555
-7.5-0.991-4,515
-5.0-0.946-4,309
-2.5-0.752-3,425
0.00.0000
2.50.7523,425
5.00.9464,309
7.50.9914,515
10.01.0004,555
12.50.9974,542
15.00.9904,508
17.50.9804,466
20.00.9704,421
22.50.9614,377
25.00.9514,334
27.50.9434,294
30.00.9344,256

Tire curve inputs: the slip-ratio view assumes zero slip angle; the slip-angle view assumes zero longitudinal slip. During combined braking or cornering, TORCS feeds sqrt(sx^2 + sin^2(angle)) into the same tire model.

Tire force assumption: static force applies TORCS' default load-sensitivity factors to the tire friction multiplier and average configured corner load for that axle. This illustrative view assumes level ground, equal left/right load, surface friction 1 and zero camber contribution; it excludes fuel, aerodynamic load, weight transfer, skill, wear, temperature and relaxation effects.

Engineering specifications

Dimensions

Length
4.600 m
Width
1.940 m
Height
1.100 m
Wheelbase
2.560 m
Front track
1.620 m
Rear track
1.600 m

Engine

Tickover
1,400 rpm
Limiter
8,500 rpm
Maximum authored RPM
10,000 rpm
Rotational inertia
0.200 kg·m2
Fuel consumption factor
1.190
Torque at limiter
445.0 N·m

Transmission and differentials

Layout
RWD
Shift time
0.150 s
Final drive
3.070
Driven wheel radius
0.328 m
Gear ratios
1: 3.800; 2: 2.800; 3: 1.850; 4: 1.450; 5: 1.250; 6: 1.080
Differentials
front: NONE (1.000); rear: LIMITED SLIP (3.070)

Aerodynamics

Drag coefficient
0.350
Frontal area
1.950 m2
CdA
0.683 m2
Front / rear lift coefficient
0.720 / 0.680
Front wing
0.270 m2 at 4.0°
Rear wing
0.720 m2 at 10.0°

Mass distribution and static corner loads

Configured mass
1,150.0 kg (incl. driver, excl. fuel)
CG height
0.240 m
Front / rear
52.0% / 48.0%
Front right / left
299.0 / 299.0 kg
Rear right / left
276.0 / 276.0 kg

Tires

Front size
255/40 R18
Front radius
0.331 m
Front tire friction multiplier
1.60
Front sliding / peak ratio
0.70
Front stiffness / Magic Formula
24.000; B 15.932, C 1.506, E 0.700
Rear size
330/30 R18
Rear radius
0.328 m
Rear tire friction multiplier
1.60
Rear sliding / peak ratio
0.70
Rear stiffness / Magic Formula
24.000; B 15.932, C 1.506, E 0.700

Controls

Steering lock
21.0°
Front brake fraction
51.0%
Maximum brake pressure
22,000 kPa

Suspension and ride frequency

Front right
560.8 lbf/in; 2.88 Hz
Front right bellcrank / wheel rate
1.000 / 560.8 lbf/in
Front left
560.8 lbf/in; 2.88 Hz
Front left bellcrank / wheel rate
1.000 / 560.8 lbf/in
Rear right
560.8 lbf/in; 3.00 Hz
Rear right bellcrank / wheel rate
1.000 / 560.8 lbf/in
Rear left
560.8 lbf/in; 3.00 Hz
Rear left bellcrank / wheel rate
1.000 / 560.8 lbf/in

Default setup sheet

Aerodynamics

Front Wing

SettingDefault
angle 4.0°

Rear Wing

SettingDefault
angle 10.0°

Controls

Steer

SettingDefault
steer lock 21.0°

Brake System

SettingDefault
front-rear brake repartition 0.510
max pressure 22,000 kPa

Wheels

Front Left Wheel

SettingDefault
ride height 85.0 mm
toe 0.00°
camber -5.00°
caster 3.5°

Front Right Wheel

SettingDefault
ride height 85.0 mm
toe 0.00°
camber -5.00°
caster 3.5°

Rear Left Wheel

SettingDefault
ride height 100.0 mm
toe 0.00°
camber -3.00°

Rear Right Wheel

SettingDefault
ride height 100.0 mm
toe 0.00°
camber -3.00°

Suspension

Front Left Suspension

SettingDefault
spring 561 lbf/in
packers 0.0 mm
slow bump 30.6 lbf/in/s
slow rebound 20.4 lbf/in/s
fast bump 5.1 lbf/in/s
fast rebound 11.2 lbf/in/s
fast bump threshold 25.0 cm/s
fast rebound threshold 25.0 cm/s

Front Right Suspension

SettingDefault
spring 561 lbf/in
packers 0.0 mm
slow bump 30.6 lbf/in/s
slow rebound 20.4 lbf/in/s
fast bump 5.1 lbf/in/s
fast rebound 11.2 lbf/in/s
fast bump threshold 25.0 cm/s
fast rebound threshold 25.0 cm/s

Rear Left Suspension

SettingDefault
spring 561 lbf/in
packers 10.0 mm
slow bump 20.4 lbf/in/s
slow rebound 30.6 lbf/in/s
fast bump 5.1 lbf/in/s
fast rebound 11.2 lbf/in/s
fast bump threshold 25.0 cm/s
fast rebound threshold 25.0 cm/s

Rear Right Suspension

SettingDefault
spring 561 lbf/in
packers 10.0 mm
slow bump 20.4 lbf/in/s
slow rebound 30.6 lbf/in/s
fast bump 5.1 lbf/in/s
fast rebound 11.2 lbf/in/s
fast bump threshold 25.0 cm/s
fast rebound threshold 25.0 cm/s

Third elements and anti-roll bars

Each axle spring and damper set configures a third suspension element shared by its left and right wheels.

Front third element

SettingDefault
spring 0 lbf/in
suspension course 0.0 mm
slow bump 0.0 lbf/in/s
slow rebound 0.0 lbf/in/s

Rear third element

SettingDefault
spring 0 lbf/in
suspension course 0.0 mm
slow bump 0.0 lbf/in/s
slow rebound 0.0 lbf/in/s

Front Anti-Roll Bar

SettingDefault
spring 0 lbf/in

Rear Anti-Roll Bar

SettingDefault
spring 0 lbf/in

Differentials

Rear Differential

Type: Limited slip

SettingDefault
ratio 3.070
max slip bias 0.030
locking input torque 5,000 N·m
locking brake input torque 1,500 N·m

Gearbox

Forward gears

SettingDefault
Gear 1 ratio 3.800
Gear 2 ratio 2.800
Gear 3 ratio 1.850
Gear 4 ratio 1.450
Gear 5 ratio 1.250
Gear 6 ratio 1.080