I have a car on a-chassis and I want to set the maximum speed to 40 kilometers per hour. I tried changing Tune.Ratios but the speed either decreased or increased, I didn’t like it
Don’t the instructions in the A-Chassis script (or it’s READ ME script) tell you how to set the maximum speed?
I don’t have the script open so I can’t tell how it does it.
A-Chassis Tune:
--[[
___ _______ _
/ _ |____/ ___/ / ___ ____ ___ (_)__
/ __ /___/ /__/ _ \/ _ `(_-<(_-</ (_-<
/_/ |_| \___/_//_/\_,_/___/___/_/___/
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 = -1
Tune.RCamber = -1
Tune.FToe = 0
Tune.RToe = 0
--[[Weight and CG]]
Tune.Weight = 4000 -- Total weight (in pounds)
Tune.WeightBSize = { -- Size of weight brick (dimmensions in studs ; larger = more stable)
--[[Width]] 6 ,
--[[Height]] 3 ,
--[[Length]] 9 }
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.FAntiRoll = 50 -- Anti-Roll (Gyro Dampening)
Tune.FSusLength = 2 -- Suspension length (in studs)
Tune.FPreCompress = .3 -- Pre-compression adds resting length force
Tune.FExtensionLim = .3 -- Max Extension Travel (in studs)
Tune.FCompressLim = .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.FAntiRoll = 50 -- Anti-Roll (Gyro Dampening)
Tune.RSusLength = 2 -- Suspension length (in studs)
Tune.RPreCompress = .3 -- Pre-compression adds resting length force
Tune.RExtensionLim = .3 -- Max Extension Travel (in studs)
Tune.RCompressLim = .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 = "Bright red" -- 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 = 200 -- [TORQUE CURVE VISUAL]
Tune.IdleRPM = 700 -- https://www.desmos.com/calculator/2uo3hqwdhf
Tune.PeakRPM = 6000 -- Use sliders to manipulate values
Tune.Redline = 6700 -- Copy and paste slider values into the respective tune values
Tune.EqPoint = 5500
Tune.PeakSharpness = 7.5
Tune.CurveMult = 0.16
--Incline Compensation
Tune.InclineComp = 1.7 -- Torque compensation multiplier for inclines (applies gradient from 0-90 degrees)
--Misc
Tune.RevAccel = 150 -- RPM acceleration when clutch is off
Tune.RevDecay = 75 -- RPM decay when clutch is off
Tune.RevBounce = 500 -- RPM kickback from redline
Tune.IdleThrottle = 3 -- Percent throttle at idle
Tune.ClutchTol = 500 -- Clutch engagement threshold (higher = faster response)
--[[Drivetrain]]
Tune.Config = "AWD" --"FWD" , "RWD" , "AWD"
--Differential Settings
Tune.FDiffSlipThres = 45 -- 1 - 100% (Max threshold of applying full lock determined by deviation from avg speed)
Tune.FDiffLockThres = 45 -- 0 - 100% (0 - Bias toward slower wheel, 100 - Bias toward faster wheel)
Tune.RDiffSlipThres = 45 -- 1 - 100%
Tune.RDiffLockThres = 45 -- 0 - 100%
Tune.CDiffSlipThres = 45 -- 1 - 100% [AWD Only]
Tune.CDiffLockThres = 45 -- 0 - 100% [AWD Only]
--Traction Control Settings
Tune.TCSEnabled = true -- 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", "Manual"} --[[
[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 = 3 -- Gearing determines top speed and wheel torque
Tune.Ratios = { -- Higher ratio = more torque, Lower ratio = higher top speed
--[[Reverse]] 3.70 , -- Copy and paste a ratio to add a gear
--[[Neutral]] 0 , -- Ratios can also be deleted
--[[ 1 ]] 3.53 , -- Reverse, Neutral, and 1st gear are required
--[[ 2 ]] 2.04 ,
--[[ 3 ]] 1.38 ,
--[[ 4 ]] 1.03 ,
--[[ 5 ]] 0.81 ,
--[[ 6 ]] 0.64 ,
}
Tune.FDMult = 1.5 -- Ratio multiplier (Change this value instead of FinalDrive if car is struggling with torque ; Default = 1)
--[[Brakes]]
Tune.ABSEnabled = true -- 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
ToggleTCS = Enum.KeyCode.T ,
ToggleABS = Enum.KeyCode.Y ,
ToggleTransMode = Enum.KeyCode.M ,
ToggleMouseDrive = Enum.KeyCode.R ,
--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
README:
--[[ <<DO NOT DELETE THIS MODULE>>
___ _______ _
/ _ |____/ ___/ / ___ ____ ___ (_)__
/ __ /___/ /__/ _ \/ _ `(_-<(_-</ (_-<
/_/ |_| \___/_//_/\_,_/___/___/_/___/ Build 6.52S2
SecondLogic @ Inspare
>>Manual
Basically...everything you can and would ever want to touch is in the tuning module. EVERYTHING
Torque Curve Tune Visualizer:
https://www.desmos.com/calculator/2uo3hqwdhf
Basic Tips:
--Installation
>Everything is built-in (assembly, welding, suspension, gyros), so all you have to worry about is placing the wheels and the seat.
>Body parts go in the "Body" section.
>Wheel parts such as 3D rims and brake disks go in the "Parts" section of the wheel.
>Suspension-Anchored parts such as suspension wishbones and linkages go in the "SuspensionFixed" section.
>Axle-Anchored parts such as calipers go in the "WheelFixed" section.
>You can add or remove wheels. To add a wheel, simply copy one of the wheels and make sure it's named one of the following: "F","FL","FR","R","RL","RR".
>Wheels need to be aligned with the axes of the seat. Don't rotate the seat relative to the wheels as it may cause welding problems.
>All wheel offsets are applied in the tuning module. Do NOT manually add offset to the wheels. Steering axis is centered on the wheel part by default.
>Seat offset can be adjusted in the "MiscWeld" module under "Initialize".
>Use the "Misc" section for scripted/moving parts and apply welding using the "MiscWeld" module under "Initialize".
--Tuning
>Reduce weight(density) if setup is lacking torque. Increase density if setup has too much torque.
>Add downforce manually if setup is lacking grip or use a downforce plugin.
>Dialing in ratios used in real cars is an easy way to have a realisticly tuned transmission.
>Modifying the "Drive" script may affect the integrity of the system.
>Custom scripts should be put in the "Plugins" folder. Using plugins made by other users is encouraged.
>When writing custom plugins, you can reference the values within the "Values" folder inside the A-Chassis Interface.
>It is a good practice to make plugins compatible with any setup and providing a usage manual if a plugin is released.
>You can remove/change the default plugins that come with the kit. The drive system will still work perfectly with or without them.
--Updates
>To update, simply just replace the entire "A-Chassis Tune" module of an existing car with a newer version of the module.
>You may want to copy the tune values and plugins from the old module, but dont simply overwrite the tune module as new values may be added.
>>Changelog
[6/10/17 : Build 6.52S2] - Fixed Initialization Orientation
[Fixed Initialization Rotation]
-Fixed initialization rotation glitch
[6/8/17 : Build 6.51S2] - More Suspension Tuning
[Re-Added Suspension Values]
-New suspension tuning is now the same as the previous suspension
-AntiRoll and PreCompress are now added to suspension tuning
[Fixes]
-Fixed Rev-Boucing: Car does not stall anymore when rev-bouncing
-Fixed Stock Gauges not showing the the right transmission mode / pbrake mode
[6/8/17 : Build 6.5S2] - Full Suspension Change and Optimization
[New Suspension System]
-Suspension Linkages are now made using axles instead of constraints
-Better overall stability and ease of tuning
-SpringConstraint Tuning has been changed in the tune to more meaningful values
-Added AntiRoll system using gyro dampening on the suspension linkages
-AxleSize affects the size of suspension linkage parts
[Major Performance Optimizations]
-Torque output calculations are now cached (pre-calculated and stored) to reduce runtime cpu load
-Constant multipliers for several lines have been simplified and cached
-Split Engine function into RPM calculation and Power Output
-Split runtime loops into different cycle rates
-RPM calculation, Steering, and External Value updating now run on 60 FPS max (from 30) for smoother steering and RPM tracking.
-Engine Output and Flip now run on 15 FPS max (from 30) to reduce runtime cpu load
-Overall percieved smoothness is now TWICE AS MUCH but runtime cpu load has actually been HALVED!!!
[5/23/17 : Build 6.43S] - STUFF
[Added Tune Values]
-Added WBVisible to set weight brick visibility
[Independent Camera Handling]
-Separated camera handling from Drive script
-Mouse camera is now handled by a plugin
-Custom camera plugin support is now easier
[Stock Plugins Update]
-Added Dynamic Friction as a stock plugin
-Dynamic friction can be tuned within the Simulated script
-Updated default sound plugin
-Added mouse-steer camera plugin
[Code Fixes]
-Fixed missing operation within torque curve
-Slight optimizations during runtime
[5/20/17 : Build 6.42S] - ABS and PGS Standardization
[Added ABS]
-Modulates brakes when locking
-Added threshold value for slip allowance
-Added control toggles for ABS
-Added ABS indicator and control mapping to stock UI
[Split Density Tuning for PGS and Legacy]
-Added standardized weight scaling values to tune
-Default weight tuning set to 1 cubic stud : 50 lbs for PGS
-Default weight tuning set to 1 cubic stud : 10 lbs for Legacy
-Split front and rear density to PGS and Legacy
-Split brake force tuning to PGS and Legacy
[Added Tune Values]
-TCSEnabled: Sets whether or not the car will have TCS
-ABSEnabled: Sets whether or not the car will have ABS
-LoadDelay: Sets a delay time before initializing car
[Bug Fix: Axle Size Initialization]
-Car applies proper axle size
-Added AxleDensity value which sets axle density
-Fixed miscelaneous wheel part welding
[Added Changable Stock Gauge Units]
-Added units system for stock gauges
-Added default units: MPH [1 stud : 10 in], KP/H [1 stud : 10 in], SPS
-Custom units can be added or removed
-Click on speed to change between units
-Moved Controls button to middle for better visibility
[Code Documentation]
-Extensive documentation and commenting within scripts for better readability
-Improved warning message for oversized mass condition
[5/4/17 : Build 6.41S] - Standardized Weight
[Added automatic weight system]
-Added tune values for car weight, center of gravity, and wheel density
-Weight standard: 100 lbs = 1 cubic stud mass
-Applies weight at initialization
[Scaled Down Power Delivery]
-Horsepower output now at 1/10 because of lighter weight standard
-Added FDMult value in transmission for gear ratio scaling without having to change Final Drive (useful for low HP tunes)
[Optimized value for Anchor Offset]
-Changed "SusOffset" to "Anchor Offset"
-New anchor offset is now based off of wishbone length and wishbone angle.
-Anchor offset now labelled for forward, lateral, and vertical offsets.
[Split some tune values to F/R]
-Suspension values for front and rear are now independently tunable.
-Front and rear brakes can be tuned independently.
[Tune Module Housekeeping]
-Rearranged and documented several of the values within the tune module.
-Removed GyroP and GyroMaxTorque for simplicity. Dampening values are still present.
-Changed some decimal values to percent values
[1/2/17 : Build 6.40S] - Suspension
"S" Build number identifies suspension build
[Added suspension system for PGS Physics Solver]
-Suspension uses ROBLOX constraints and is automatically generated with the chassis
-Added tune values for suspension
-Temporarily removed caster tuning
[Steering Fix]
-Added tune value 'ReturnSpeed' which determines how fast wheels return to default orientation
[New Torque Curve Equation]
-New equation gives more control over the shape of the torque curve
-Engine values have been replaced with the new equation's variables
-Added link to desmos graph for the torque curve visualization
[10/31/16 : Build 6.33] - Semi-Automatic
[Added semi-automatic transmission mode]
-'TransModes' now accepts "Semi" value for semi-automatic.
-Updated AC6_Stock_Gauges to include semi-automatic mode.
[Fixed disengaging p-brake]
-P-Brake now remains engaged if player gets into then vehicle.
[Fixed FE Support for AC6_Stock_Sound]
-Sounds should now work properly with Filtering Enabled.
[8/5/16 : Build 6.32] - Differential System
[Implemented differential system]
-Differential controls torque distibution between wheels that are spinning at different rates
-Added tune values 'FDiffSlipThres', 'FDiffLockThres', 'RDiffSlipThres', 'RDiffLockThres', 'CDiffSlipThres', and 'CDiffLockThres'.
-'DiffSlipThres' determine the threshold of the speed difference between the wheels. Full lock applies at max threshold.
-A lower slip threshold value will make the diff more aggressive.
-'DiffLockThres' determines the bias of the differential.
-A lock threshold value more than 50 puts more torque into the slipping wheel (moving towards an open diff).
-A lock threshold value less than 50 puts more torque into the grounded wheel (moving towards a locked diff).
[Fixed multiple wheel support]
-The chassis can now use more than just the default 4 set of wheels. Just copy an existing wheel and place accordingly.
-Differential works with auxiliary wheels.
[7/13/16 : Build 6.31] - Peripheral Settings
[Added peripheral adjustment values]
-Moved controller and mouse deadzone values to the "Controls" section of the tune.
-Split controller deadzone into left and right input.
-Moved mouse control width to "Conrols" secton. This value now operates based off of % of screed width.
[Updated stock Controls Module]
-Added sliders for controller and mouse deadzone values.
-Added slider for mouse control width.
[6/15/16 : Build 6.3] - Motercisly
[Better motorcycle system support]
-Added wheel configurations "F" and "R" for single wheel settup.
-"F" and "R" wheels will have axle parts on both sides for better balance.
-These wheel configurations will ignore outor rotation value and will rotated based off of the inner rotation value only.
-Camber and Toe cannot be applied to these wheel configurations. Caster will still be applied as normal.
[Bug fixes]
-Caster now applies after wheel part rotations so wheel parts dont rotate with caster.
-Fixed Clutch re-engaging automatically when shifting out of neutral.
[6/4/16 : Build 6.21] - AC6 Official Public Kit Release
[Plugin FilteringEnabled compatability made easier]
-System now detects if there is a RemoteEvent or RemoteFunction inside a plugin. These will be parented directly under the car.
-The RemoteEvent/RemoteFunction needs to be a direct child of the plugin for it to be detected.
-Scripts inside the RemoteEvent/RemoteFunction should be disabled. They will be enabled after initialization.
-Be careful as this system is suceptible to name collisions. Name your RemoteEvents/RemoteFunctions uniquely.
-Stock AC6 Sound plugin is now FE compatible.
[Controls Panel now a plugin instead of integrated]
-Separated controls panel from Drive script. The controls panel is now a plugin.
-The "Controls" folder appears inside the interface on Drive startup. Use this folder to reference button mapping values for custom controls plugins.
-"ControlsOpen" value added. This is a safety toggle when changing control values. This value can be manipulated by plugins.
[New tune values]
-Added 'AutoFlip' tune value. This determines if the car automatically flips itself over when upside down.
-Added 'StAxisOffset' tune value. This offsets the center of the steering axis. Positive value = offset outward.
-Added 'SteerD', 'SteerMaxTorque', and 'SteerP' values which set the steering axle gyro properties.
[MiscWeld streamlining]
-Added "Misc" section to the main sections. This should contain scripted/moving parts.
-Parts in this section are NOT WELDED AUTOMATICALLY. Use the "MiscWeld" module to weld these parts. The "Misc" section is pre-referenced as 'misc'.
[Bug fixes]
-Fixed flip gyro not resetting when gyro is active and driver leaves car.
-Fixed issue with switching transmission modes.
--]]
return "6.52S2"
I couldn’t find the maximum speed in these scripts 
1 Like
SOLUTION:
change it
explanation: the car’s gears will not change and because of this the speed is lower
So it does explain it, it just assumes you know how the engine rpm and gear ratios work in a real car.
2 Likes
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