How to change A chassis tune speed and aceleration?

Hello!
I was wondering, how do I change speed and acceleration of A chassis?
It’s kinda hard to understand
Well, if you have experience with A-Chassis!
If you could help me, thanks!
These are my current configs:

--[[
		___      _______                _     
	   / _ |____/ ___/ /  ___ ____ ___ (_)__ 
	  / __ /___/ /__/ _ \/ _ `(_-<(_-</ (_-<
	 /_/ |_|   \___/_//_/\_,_/___/___/_/___/
 						SecondLogic @ Inspare
]]

local Tune = {}

--[[Misc]]
	Tune.LoadDelay		= .1		-- Delay before initializing chassis (in seconds)
	Tune.AutoStart		= true		-- Set to false if using manual ignition plugin
	Tune.AutoFlip		= true		-- Set to false if using manual flip plugin
	
--[[Wheel Alignment]]
	--[Don't physically apply alignment to wheels]
	--[Values are in degrees]
	Tune.FCamber		= 0
	Tune.RCamber		= 0
	Tune.FToe			= 0
	Tune.RToe			= 0
	
--[[Weight and CG]]
	Tune.Weight			= 2400		-- Total weight (in pounds)
	Tune.WeightBSize	= {			-- Size of weight brick (dimmensions in studs ; larger = more stable)
	 --[[Width]]		6		,
	 --[[Height]]		3.5		,
	 --[[Length]]		14		}
	Tune.WeightDist		= 50		-- Weight distribution (0 - on rear wheels, 100 - on front wheels, can be <0 or >100)
	Tune.CGHeight		= .8		-- Center of gravity height (studs relative to median of all wheels)
	Tune.WBVisible		= false		-- Makes the weight brick visible
	
	--Unsprung Weight
	Tune.FWheelDensity	= .1		-- Front Wheel Density
	Tune.RWheelDensity	= .1		-- Rear Wheel Density
	Tune.FWLgcyDensity	= 1			-- Front Wheel Density [PGS OFF]
	Tune.RWLgcyDensity	= 1			-- Rear Wheel Density [PGS OFF]
	
	Tune.AxleSize		= 2			-- Size of structural members (larger = more stable/carry more weight)
	Tune.AxleDensity	= .1		-- Density of structural members
	
--[[Susupension]]
	Tune.SusEnabled		= true		-- works only in with PGSPhysicsSolverEnabled, defaults to false when PGS is disabled
	
	--Front Suspension
	Tune.FSusDamping	= 500		-- Spring Dampening
	Tune.FSusStiffness	= 9000		-- Spring Force
	Tune.FSusLength		= 2			-- Suspension length (in studs)
	Tune.FSusMaxExt		= .3		-- Max Extension Travel (in studs)
	Tune.FSusMaxComp	= .1		-- Max Compression Travel (in studs)
	Tune.FSusAngle		= 80		-- Suspension Angle (degrees from horizontal)
		
	Tune.FWsBoneLen		= 5			-- Wishbone Length
	Tune.FWsBoneAngle	= 0			-- Wishbone angle (degrees from horizontal)
	Tune.FAnchorOffset	= {			-- Suspension anchor point offset (relative to center of wheel)
	 --[[Lateral]]		-.4		,	-- positive = outward
	 --[[Vertical]]		-.5		,	-- positive = upward
	 --[[Forward]]		0		}	-- positive = forward
	
	--Rear Suspension
	Tune.RSusDamping	= 500		-- Spring Dampening
	Tune.RSusStiffness	= 9000		-- Spring Force
	Tune.RSusLength		= 2			-- Suspension length (in studs)
	Tune.RSusMaxExt		= .3		-- Max Extension Travel (in studs)
	Tune.RSusMaxComp	= .1		-- Max Compression Travel (in studs)
	Tune.RSusAngle		= 80		-- Suspension Angle (degrees from horizontal)
		
	Tune.RWsBoneLen		= 5			-- Wishbone Length
	Tune.RWsBoneAngle	= 0			-- Wishbone angle (degrees from horizontal)
	Tune.RAnchorOffset	= {			-- Suspension anchor point offset (relative to center of wheel)
	 --[[Lateral]]		-.4		,	-- positive = outward
	 --[[Vertical]]		-.5		,	-- positive = upward
	 --[[Forward]]		0		}	-- positive = forward

	--Aesthetics	
	Tune.SusVisible		= true			-- Spring Visible
	Tune.WsBVisible		= false			-- Wishbone Visible
	Tune.SusRadius		= .2			-- Suspension Coil Radius
	Tune.SusThickness	= .1			-- Suspension Coil Thickness
	Tune.SusColor		= "Really black"	-- Suspension Color [BrickColor]
	Tune.SusCoilCount	= 6				-- Suspension Coil Count
	Tune.WsColor		= "Black"		-- Wishbone Color [BrickColor]
	Tune.WsThickness	= .1			-- Wishbone Rod Thickness
	
--[[Wheel Stabilizer Gyro]]
	Tune.FGyroDamp		= 100		-- Front Wheel Non-Axial Dampening
	Tune.RGyroDamp		= 100		-- Rear Wheel Non-Axial Dampening
	
--[[Steering]]
	Tune.SteerInner		= 36		-- Inner wheel steering angle (in degrees)
	Tune.SteerOuter		= 37		-- Outer wheel steering angle (in degrees)
	Tune.SteerSpeed		= .05		-- Steering increment per tick (in degrees)
	Tune.ReturnSpeed	= .1		-- Steering increment per tick (in degrees)
	Tune.SteerDecay		= 320		-- Speed of gradient cutoff (in SPS)
	Tune.MinSteer		= 10		-- Minimum steering at max steer decay (in percent)
	Tune.MSteerExp		= 1			-- Mouse steering exponential degree
	
	--Steer Gyro Tuning
	Tune.SteerD			= 1000		-- Steering Dampening
	Tune.SteerMaxTorque	= 50000		-- Steering Force
	Tune.SteerP			= 100000	-- Steering Aggressiveness
	
--[[Engine]]
	--Torque Curve
	Tune.Horsepower		= 480		--	[TORQUE CURVE VISUAL]
Tune.IdleRPM		= 700		--		https://www.desmos.com/calculator/2uo3hqwdhf
Tune.PeakRPM		= 5400
	Tune.Redline		= 6200	--		Copy and paste slider values into the respective tune values
	Tune.EqPoint		= 6500
	Tune.PeakSharpness	= 7.5
	Tune.CurveMult		= 0.16
	
	--Incline Compensation
	Tune.InclineComp	= 4.7			-- Torque compensation multiplier for inclines (applies gradient from 0-90 degrees)
	
	--Misc
	Tune.RevAccel		= 450		-- RPM acceleration when clutch is off
	Tune.RevDecay		= 150		-- RPM decay when clutch is off
	Tune.RevBounce		= 500		-- RPM kickback from redline
	Tune.IdleThrottle	= 0.01		-- Percent throttle at idle
	Tune.ClutchTol		= 1000		-- Clutch engagement threshold (higher = faster response)
	
--[[Drivetrain]]	
	Tune.Config			= "AWD"		--"FWD" , "RWD" , "AWD"
	
	--Differential Settings	
	Tune.FDiffSlipThres	= 50		-- 1 - 100%				(Max threshold of applying full lock determined by deviation from avg speed)
	Tune.FDiffLockThres	= 50		-- 0 - 100%				(0 - Bias toward slower wheel, 100 - Bias toward faster wheel)
	Tune.RDiffSlipThres	= 50		-- 1 - 100%
	Tune.RDiffLockThres	= 50		-- 0 - 100%
	Tune.CDiffSlipThres	= 50		-- 1 - 100%				[AWD Only]
	Tune.CDiffLockThres	= 50		-- 0 - 100%				[AWD Only]
	
	--Traction Control Settings
	Tune.TCSEnabled		= false		-- Implements TCS
	Tune.TCSThreshold	= 20		-- Slip speed allowed before TCS starts working (in SPS)
	Tune.TCSGradient	= 20		-- Slip speed gradient between 0 to max reduction (in SPS)
	Tune.TCSLimit		= 10		-- Minimum amount of torque at max reduction (in percent)
	
--[[Transmission]]
	Tune.TransModes		= {"Auto", "Semi",}								--[[
	[Modes]
		"Auto"		: Automatic shifting
		"Semi"		: Clutchless manual shifting, dual clutch transmission
		"Manual"	: Manual shifting with clutch
		
		>Include within brackets
			eg: {"Semi"} or {"Auto", "Manual"}								
		>First mode is default mode													]]
	
	--Automatic Settings
	Tune.AutoShiftMode	= "Speed"												--[[
	[Modes]
		"Speed"		: Shifts based on wheel speed
		"RPM"		: Shifts based on RPM											]]	
	Tune.AutoUpThresh	= -200		--Automatic upshift point 	(relative to peak RPM, positive = Over-rev)
	Tune.AutoDownThresh = 1400		--Automatic downshift point (relative to peak RPM, positive = Under-rev)
	
	--Gear Ratios
Tune.FinalDrive		= 7		-- Gearing determines top speed and wheel torque
Tune.Ratios			= {
		--[[Reverse]]	5			,
		--[[Neutral]]	0			,
		--[[ 1 ]]		3.7			,
		--[[ 2 ]]		2.52		,
		--[[ 3 ]]		1.81		,
		--[[ 4 ]]		1.42		,
		--[[ 5 ]]		1.15		,
		--[[ 6 ]]		.98			,
		--[[ 7 ]]		.70			,
		--[[ 8 ]]		.50			,
	}
	Tune.FDMult			= 1		-- Ratio multiplier (Change this value instead of FinalDrive if car is struggling with torque ; Default = 1)
	
--[[Brakes]]
	Tune.ABSEnabled		= false		-- Implements ABS
	Tune.ABSThreshold	= 20		-- Slip speed allowed before ABS starts working (in SPS) 

	Tune.FBrakeForce	= 1500		-- Front brake force
	Tune.RBrakeForce	= 1000		-- Rear brake force
	Tune.PBrakeForce	= 5000		-- Handbrake force
	
	Tune.FLgcyBForce	= 15000		-- Front brake force [PGS OFF]
	Tune.RLgcyBForce	= 10000		-- Rear brake force [PGS OFF]
	Tune.LgcyPBForce	= 25000		-- Handbrake force [PGS OFF]
	
--[[[Default Controls]]
	--Peripheral Deadzones
	Tune.Peripherals = {
		MSteerWidth				= 67		,	-- Mouse steering control width	(0 - 100% of screen width)
		MSteerDZone				= 10		,	-- Mouse steering deadzone (0 - 100%)
		
		ControlLDZone			= 5			,	-- Controller steering L-deadzone (0 - 100%)
		ControlRDZone			= 5			,	-- Controller steering R-deadzone (0 - 100%)
	}
	
	--Control Mapping
	Tune.Controls = {
		
	--Keyboard Controls
		--Mode Toggles
		ToggleABS				= Enum.KeyCode.Y					,
		ToggleTransMode			= Enum.KeyCode.M					,
		--Primary Controls
		Throttle				= Enum.KeyCode.Up					,
		Brake					= Enum.KeyCode.Down					,
		SteerLeft				= Enum.KeyCode.Left					,
		SteerRight				= Enum.KeyCode.Right				,
		
		--Secondary Controls
		Throttle2				= Enum.KeyCode.W					,
		Brake2					= Enum.KeyCode.S					,
		SteerLeft2				= Enum.KeyCode.A					,
		SteerRight2				= Enum.KeyCode.D					,
		
		--Manual Transmission
		ShiftUp					= Enum.KeyCode.E					,
		ShiftDown				= Enum.KeyCode.Q					,
		Clutch					= Enum.KeyCode.LeftShift			,
		
		--Handbrake
		PBrake					= Enum.KeyCode.P					,
		
	--Mouse Controls
		MouseThrottle			= Enum.UserInputType.MouseButton1	,
		MouseBrake				= Enum.UserInputType.MouseButton2	,
		MouseClutch				= Enum.KeyCode.W					,
		MouseShiftUp			= Enum.KeyCode.E					,
		MouseShiftDown			= Enum.KeyCode.Q					,
		MousePBrake				= Enum.KeyCode.LeftShift			,
		
	--Controller Mapping
		ContlrThrottle			= Enum.KeyCode.ButtonR2				,
		ContlrBrake				= Enum.KeyCode.ButtonL2				,
		ContlrSteer				= Enum.KeyCode.Thumbstick1			,
		ContlrShiftUp			= Enum.KeyCode.ButtonY				,
		ContlrShiftDown			= Enum.KeyCode.ButtonX				,
		ContlrClutch			= Enum.KeyCode.ButtonR1				,
		ContlrPBrake			= Enum.KeyCode.ButtonL1				,
		ContlrToggleTMode		= Enum.KeyCode.DPadUp				,
		ContlrToggleTCS			= Enum.KeyCode.DPadDown				,
		ContlrToggleABS			= Enum.KeyCode.DPadRight			,
	}
	
--[[Weight Scaling]]
	--[Cubic stud : pounds ratio]
	--[STANDARDIZED: Don't touch unless needed]
	Tune.WeightScaling = 1/50	--Default = 1/50 (1 cubic stud = 50 lbs)
	Tune.LegacyScaling = 1/10	--Default = 1/10 (1 cubic stud = 10 lbs) [PGS OFF]
	
return Tune

I was searching for, more speed, and a bit more of acceleration, Not experienced with cars either with A chassis.

6 Likes

Just from a glance, have you tried tweaking the engine variables under the ‘engine’ comment? Maybe try increasing the horsepower and PeakRPM variables to increase max speed and acceleration.

20 Likes

how would i do this during gameplay?

require A-Chassis module from vehicle and tweak it from script

Ya i tried that but it doesnt work, i had a look over the scripts and it looks like the speed is calcuated as soon as the module is required, and isnt taken into account after. the scritps are way too advanced for me though so i do not know how to alter it for during gameplay

There is a value folder you need to change those while in game but in order to get them to activly take effect you need to modify the Drive script and add PropertyChangedSignals On the values to update the Drive script to recaculate the values that got changed to get updated

2 Likes

Modify the gear ratios you can look up the cars gear ratios on google