Car going from 0 to 100 instantly

[DenisxdX3 (DenisX3)]

Hi everyone! I’ll be quick with the issue, simply the car goes from 0 to 100 instantly and i can’t find the part to edit it and making the car smooth, since i’m not able to make my own car i’m using this one from the toolbox and editing it

Model i’m using
https://www.roblox.com/library/6196911142/Car

Scripts i’m using

Raycast Module

local module = {}

function module.new(startPosition, startDirection)
	local maxDistance = startDirection.magnitude
	local direction = startDirection.unit
	local lastPosition = startPosition
	local distance = 0
	local ignore = {}
	
	local hit, position, normal
	
	repeat
		local ray = Ray.new(lastPosition, direction * (maxDistance - distance))
		hit, position, normal = game.Workspace:FindPartOnRayWithIgnoreList(ray, ignore, false, true)
		if hit then
			if not hit.CanCollide then
				table.insert(ignore, hit)
			end
		end
		distance = (startPosition - position).magnitude
		lastPosition = position
	until distance >= maxDistance - 0.1 or (hit and hit.CanCollide)
	return hit, position, normal
end

return module

LocalCarScript

--local camera = game.Workspace.CurrentCamera
local player = game.Players.LocalPlayer
local character = player.Character
local humanoidRootPart = character.HumanoidRootPart
local car = script:WaitForChild("Car").Value
local stats = car:WaitForChild("Configurations")
local Raycast = require(car.CarScript.RaycastModule)

--local cameraType = Enum.CameraType.Follow

local movement = Vector2.new()
local gamepadDeadzone = 0.14

car.DriveSeat.Changed:connect(function(property)
	if property == "Steer" then
		movement = Vector2.new(car.DriveSeat.Steer, movement.Y)
	elseif property == "Throttle" then
		movement = Vector2.new(movement.X, car.DriveSeat.Throttle)
	end
end)

local force = 0
local damping = 0

local mass = 0

for i, v in pairs(car:GetDescendants()) do
	if v:IsA("BasePart") then
		mass = mass + (v:GetMass() * workspace.Gravity)
	end
end

force = mass * stats.Suspension.Value
damping = force / stats.Bounce.Value

local bodyVelocity = Instance.new("BodyVelocity", car.Chassis)
bodyVelocity.velocity = Vector3.new(0, 0, 0)
bodyVelocity.maxForce = Vector3.new(0, 0, 0)

local bodyAngularVelocity = Instance.new("BodyAngularVelocity", car.Chassis)
bodyAngularVelocity.angularvelocity = Vector3.new(0, 0, 0)
bodyAngularVelocity.maxTorque = Vector3.new(0, 0, 0)

local rotation = 0

local function UpdateThruster(thruster,dt)
	--Make sure we have a bodythrust to move the wheel
	local bodyThrust = thruster:FindFirstChild("BodyThrust")
	if not bodyThrust then
		bodyThrust = Instance.new("BodyThrust", thruster)
	end
	--Do some raycasting to get the height of the wheel
	local hit, position = Raycast.new(thruster.Position, thruster.CFrame:vectorToWorldSpace(Vector3.new(0, -1, 0)) * stats.Height.Value)
	local thrusterHeight = (position - thruster.Position).magnitude
	if hit and hit.CanCollide then
		--If we're on the ground, apply some forces to push the wheel up
		bodyThrust.force = Vector3.new(0, ((stats.Height.Value - thrusterHeight)^2) * (force / stats.Height.Value^2), 0)
		local thrusterDamping = thruster.CFrame:toObjectSpace(CFrame.new(thruster.Velocity + thruster.Position)).p * damping
		local AntiLag = ((math.abs(1-((math.clamp(dt,0,0.1)*10))+1)^2))
		bodyThrust.force = (bodyThrust.force - Vector3.new(0, thrusterDamping.Y, 0))/math.clamp((AntiLag*2)^0.5,0,10)
	else
		bodyThrust.force = Vector3.new(0, 0, 0)
	end
	
	--Wheels
	local wheelWeld = thruster:FindFirstChild("WheelWeld")
	if wheelWeld then
		wheelWeld.C0 = CFrame.new(0, -math.min(thrusterHeight, stats.Height.Value * 0.8) + (wheelWeld.Part1.Size.Y / 2), 0)
		-- Wheel turning
		local offset = car.Chassis.CFrame:inverse() * thruster.CFrame
		local speed = car.Chassis.CFrame:vectorToObjectSpace(car.Chassis.Velocity)
		if offset.Z < 0 then
			local direction = 1
			if speed.Z > 0 then
				direction = -1
			end
			wheelWeld.C0 = wheelWeld.C0 * CFrame.Angles(0, (car.Chassis.RotVelocity.Y / 2) * direction, 0)
		end
		wheelWeld.C0 = wheelWeld.C0 * CFrame.Angles(rotation, 0, 0)
	end
end

--A simple function to check if the car is grounded
local function IsGrounded()
	local hit, position = Raycast.new((car.Chassis.CFrame * CFrame.new(0, 0, (car.Chassis.Size.Z / 2) - 1)).p, car.Chassis.CFrame:vectorToWorldSpace(Vector3.new(0, -1, 0)) * (stats.Height.Value + 0.2))
	if hit and hit.CanCollide then
		return(true)
	end
	return(false)
end

--local oldCameraType = camera.CameraType
--camera.CameraType = cameraType

--spawn(function()
game:GetService("RunService").Heartbeat:Connect(function(dt)
if car:FindFirstChild("DriveSeat") and character.Humanoid.SeatPart == car.DriveSeat then
		if IsGrounded() then
			if movement.Y ~= 0 then
				local velocity = humanoidRootPart.CFrame.lookVector * movement.Y * stats.Speed.Value
				humanoidRootPart.Velocity = humanoidRootPart.Velocity:Lerp(velocity, 0.1)
				bodyVelocity.maxForce = Vector3.new(0, 0, 0)
			else
				bodyVelocity.maxForce = Vector3.new(mass / 2, mass / 4, mass / 2)
			end
			local rotVelocity = humanoidRootPart.CFrame:vectorToWorldSpace(Vector3.new(movement.Y * stats.Speed.Value / 50, 0, -humanoidRootPart.RotVelocity.Y * 5 * movement.Y))
			local speed = -humanoidRootPart.CFrame:vectorToObjectSpace(humanoidRootPart.Velocity).unit.Z
			rotation = rotation + (humanoidRootPart.CFrame:VectorToObjectSpace(humanoidRootPart.Velocity).Z/200)
			if math.abs(speed) > 0.1 then
				rotVelocity = rotVelocity + humanoidRootPart.CFrame:vectorToWorldSpace((Vector3.new(0, -movement.X * speed * stats.TurnSpeed.Value, 0)))
				bodyAngularVelocity.maxTorque = Vector3.new(0, 0, 0)
			else
				bodyAngularVelocity.maxTorque = Vector3.new(mass / 4, mass / 2, mass / 4)
			end
			humanoidRootPart.RotVelocity = humanoidRootPart.RotVelocity:Lerp(rotVelocity, 0.1)
			
			--bodyVelocity.maxForce = Vector3.new(mass / 3, mass / 6, mass / 3)
			--bodyAngularVelocity.maxTorque = Vector3.new(mass / 6, mass / 3, mass / 6)
		else
			bodyVelocity.maxForce = Vector3.new(0, 0, 0)
			bodyAngularVelocity.maxTorque = Vector3.new(0, 0, 0)
		end
		
		for i, part in pairs(car:GetChildren()) do
			if part.Name == "Thruster" then
				UpdateThruster(part,dt)
			end
		end
		
	else
	for i, v in pairs(car:GetChildren()) do
		if v:FindFirstChild("BodyThrust") then
			v.BodyThrust:Destroy()
		end
	end
	bodyVelocity:Destroy()
	bodyAngularVelocity:Destroy()
	--camera.CameraType = oldCameraType
	script:Destroy()
	end
end)

CarScript

local car = script.Parent
local stats = car.Configurations
local Raycast = require(script.RaycastModule)

local mass = 0

for i, v in pairs(car:GetDescendants()) do
	if v:IsA("BasePart") then
		mass = mass + (v:GetMass() * workspace.Gravity)
	end
end

local bodyPosition = car.Chassis.BodyPosition
local bodyGyro = car.Chassis.BodyGyro

--local bodyPosition = Instance.new("BodyPosition", car.Chassis)
--bodyPosition.MaxForce = Vector3.new()
--local bodyGyro = Instance.new("BodyGyro", car.Chassis)
--bodyGyro.MaxTorque = Vector3.new()

local function UpdateThruster(thruster)
	-- Raycasting
	local hit, position = Raycast.new(thruster.Position, thruster.CFrame:vectorToWorldSpace(Vector3.new(0, -1, 0)) * stats.Height.Value) --game.Workspace:FindPartOnRay(ray, car)
	local thrusterHeight = (position - thruster.Position).magnitude
	
	-- Wheel
	local wheelWeld = thruster:FindFirstChild("WheelWeld")
	wheelWeld.C0 = CFrame.new(0, -math.min(thrusterHeight, stats.Height.Value * 0.8) + (wheelWeld.Part1.Size.Y / 2), 0)
	-- Wheel turning
	local offset = car.Chassis.CFrame:inverse() * thruster.CFrame
	local speed = car.Chassis.CFrame:vectorToObjectSpace(car.Chassis.Velocity)
	if offset.Z < 0 then
		local direction = 1
		if speed.Z > 0 then
			direction = -1
		end
		wheelWeld.C0 = wheelWeld.C0 * CFrame.Angles(0,(car.Chassis.RotVelocity.Y / 2) * direction, 0)
	end
end


car.DriveSeat.Changed:connect(function(property)
	if property == "Occupant" then
		if car.DriveSeat.Occupant then
			local player = game.Players:GetPlayerFromCharacter(car.DriveSeat.Occupant.Parent)
			if player then
				car.DriveSeat:SetNetworkOwner(player)
				local localCarScript = script.LocalCarScript:Clone()
				localCarScript.Parent = player.PlayerGui
				localCarScript.Car.Value = car
				localCarScript.Disabled = false
			end
		end
	end
end)

--spawn(function()
	while true do
		game:GetService("RunService").Stepped:wait()
		for i, part in pairs(car:GetChildren()) do
			if part.Name == "Thruster" then
				UpdateThruster(part)
			end
		end
		if car.DriveSeat.Occupant then
			bodyPosition.MaxForce = Vector3.new()
			bodyGyro.MaxTorque = Vector3.new()
		else
			local hit, position, normal = Raycast.new(car.Chassis.Position, car.Chassis.CFrame:vectorToWorldSpace(Vector3.new(0, -1, 0)) * stats.Height.Value)
			if hit and hit.CanCollide then
				bodyPosition.MaxForce = Vector3.new(mass / 5, math.huge, mass / 5)
				bodyPosition.Position = (CFrame.new(position, position + normal) * CFrame.new(0, 0, -stats.Height.Value + 0.5)).p
				bodyGyro.MaxTorque = Vector3.new(math.huge, 0, math.huge)
				bodyGyro.CFrame = CFrame.new(position, position + normal) * CFrame.Angles(-math.pi/2, 0, 0)
			else
				bodyPosition.MaxForce = Vector3.new()
				bodyGyro.MaxTorque = Vector3.new()
			end
		end
	end
--end)

[dthecoolest]

Looking at the script, it’s the default jeep script and I have solved it previously here:

Help finding something in the default jeep

@octav20071 That is highly accurate but not as precise. It is somewhere there but a little deeper within and it’s true the script is a lot different from the old VehicleSeat cars which use the olde hinge detection from :MakeJoints() tp make the motors spin. All the actual driving movement is located in the local script, where the car actually oddly enough applies the velocity to the humanoid RootPart. If you want the jeep to accelerate to the target velocity faster you can edit the second pa…

However, I do not recommend using this as simply changing this value will lead you to other issues like turning as well. The owner of the previous post ran into those issues.

Therefore I recommend using this constraint chassis instead which is much more easier to understand and modify to which I can confirm this:

Constraint Chassis

Hi , I heard a lot of people have trouble with making constraint vehicles so i made this open sourced Chassis The Chassis Includes Suspension [image] Mobile Support (Which means the controls are on point with the user’s input) Make sure to use the new Dynamic Thumbstick for this to work properly [image] Configurations ( You can change them in real time) [image] It automatically sets networkownerships Update Automatic Welding ( You can put a Custom Body inside the Body under the M…

[IEnforce_Lawz (Mystic)]

Do you have a high torque? Higher torque = faster takeoff speed.

[LocalWE (SteamboatOrchard)]

@DenisxdX3

game.Workspace:FindPartOnRayWithIgnoreList

FindPartOnRayWithIgnoreList() is deprecated. May I interest you in

WorldRoot

and

RaycastParams

This should be the solution to your problem.

If not, please let me know. Thanks! WE

[Scottifly]

You can make your own car.
There’s a tutorial (Roblox Creator Documentation) for how to do it with Constraints, and it walks you through step by step.