Turbocharger

All information as of version 0.13

Turbochargers are a form of forced induction that uses exhaust from the engine to drive a compressor turbine, which forces more air into the engine, increasing power.

In BeamNG.Drive, turbochargers are a very easy way to increase engine power output by a large amount. However, they are much more complicated than superchargers, and can be difficult to create on your own. This wiki page should provide clarification and guidance to players and content creators who wish to create or modify turbochargers.

Jbeam Variables

Turbocharger Section

Name	Type	Unit	Default Value	Typical Range	Description
hissLoopEvent		---	"event:>Vehicle>Forced_Induction>Turbo_01>turbo_hiss"	---	Sets the turbo hiss sound. Defaults are Turbo_01, Turbo_02, and Turbo_03
hissVolumePerPSI		%	0.04	---	Increases turbo hiss sound as the turbo pressure increases
whineLoopEvent		---	"event:>Vehicle>Forced_Induction>Turbo_01>turbo_spin"	---	Sets the turbo hiss sound. Defaults are Turbo_01, Turbo_02, and Turbo_03
whinePitchPer10kRPM		%	0.05	---	Increases turbo whine pitch as the turbo RPM increases
whineVolumePer10kRPM		%	0.04	---	Increases turbo whine volume as the turbo RPM increases
bovSoundFileName		---	"event:>Vehicle>Forced_Induction>Turbo_01>turbo_bov"	---	Sets the turbo blowoff valve sound. Defaults are Turbo_01, Turbo_02, and Turbo_03
bovSoundVolumeCoef		---	0.3	---	Sets volume of the blowoff valve sound
flutterSoundFileName		---	"event:>Vehicle>Forced_Induction>Turbo_02>turbo_bov"	---	Sets the turbo flutter sound. This plays if the turbo has no blowoff valve, the engine is not diesel, and the throttle is suddenly released
flutterSoundVolumeCoef		---	0.3	---	Sets the turbo flutter sound volume
wastegateStart		PSI	0	9 - 20	The pressure at which the turbo wastegate starts to open, limiting pressure. This can also be an array, allowing for boost per gear
wastegateLimit		PSI	0	11 - 22	The pressure at which the turbo wastegate is fully open. Pressure cannot be generated above this point. This can also be an array, allowing for boost per gear
maxExhaustPower		---	1	10000 - 70000	This determines how much torque the turbocharger gets from the exhaust. The higher it is, the faster the turbo can spin
backPressureCoef		---	0.0005	0.0001 - 0.00005	How much turbo pressure is lost due to backpressure from the compressor
frictionCoef		---	0.01	10 - 60	How quickly the turbo slows down due to friction
bovEnabled		---	true	true/false	Whether or not turbo pressure is vented when the throttle is released
bovOpenThreshold		%	0.05	0.05	Engine load below which the blowoff valve activates
bovOpenChangeThreshold		%	0.3	0.3	How much the engine load must drop by instantly for the blowoff valve to activate
inertia		---	1	4 - 16	Inertia of turbo, how difficult it is to speed up and slow down
pressureRatePSI		PSI/s	30	20 - 50	How quickly the turbo can build pressure
pressurePSI	32px	---	---	---	A table that defines how much boost the turbocharger develops at a given compressor RPM
engineDef	32px	---	---	---	A table that defines how much exhaust power the turbo receives from the engine and how efficiently it uses it

Tables

The arrays for the turbocharger will likely look as follows (examples taken from covet)

pressurePSI

"turbocharger": {
        "pressurePSI":[
            //turbineRPM, pressure(PSI)
            [0,         -3.5],
            [30000,     0],
            [60000,     6],
            [90000,     9],
            [150000,    12],
            [200000,    15],
            [250000,    18],
        ],
    },

Name	Description
turbineRPM	How fast the compressor turbine is spinning. For reference, turbochargers usually operate at around 100000 RPM
pressure(PSI)	Pressure developed by the compressor turbine (in PSI)

engineDef

"turbocharger": {
"engineDef":[
            //engineRPM, efficiency, exhaustFactor
            [0,     0.0,    0.0],
            [650,   0.25,   0.05],
            [1000,   0.35,   0.1],
            [1400,  0.75,   0.45],
            [2000,  0.85,    0.7],
            [2500,  0.95,    0.85],
            [3000,  0.98,    0.9],
            [4000,  0.96,    0.95],
            [5000,  0.92,    1.0],
            [6000,  0.86,    1.0],
            [7000,  0.80,    1.0],
            [8000,  0.75,    1.0],
            [9000,  0.5,    1.0],
        ],
    },

Name	Description
engineRPM	The speed of the engine the turbocharger is attached to
efficiency	A multiplier for how much power the engine gains from the pressure generated. (by default, 1 PSI increases engine torque by 6%)
exhaustFactor	How much torque the engine exhaust exerts on the turbo. (Directly effects turbo RPM)

Vehicle Creation
Get started: Introduction to Vehicle Creation
JBeam Overview Introduction • Reference • Construction Guide Physics Nodes (refNodes) • Beams (Anisotropic • Bounded • Support • Pressured • L-Beam) • Coltris (Quads • Pressure Simulation) Dynamics DeformGroups • Engine Thermals • Hydros • Powertrain • PressureWheels • Slidenodes • Slots • Sounds • Superchargers • Turbochargers Visuals Flexbodies • Fires • GlowMap • Props (License Plates • Spotlights) • Skins Extras Blender Exporter plugin • Modeling and Texturing Guide • Vehicle Materials • Vehicle Specific Bindings Upkeep JBeam changelog • 0.8 Mod Conversion Guide • 0.8 Add-on Mod Conversion Guide • 0.8 Configuration Conversion Guide • 0.11 Mod Conversion Guide Deprecated HubWheels
See also: JBeam Examples • JBeam Physics Theory