World Touring Car Building Rules

🏁 Vehicle Basics

Essential requirements for your mod

Car Name Format

WT2_YOURCARNAME

Approved Vehicles

  • Must be based on a real-life road car model
  • Drivetrain must match factory specification
  • Conversions permitted if using factory parts

Basic Setup

  • Vehicle Type: Touring car
  • Steering Lock: 20 degrees max
  • Transmission: Sequential or H-pattern
  • Forward Gears: Six (6)

Driving Assists (5 options)

  • ABS
  • Live brake balance adjustment
  • Shift light
  • Handbrake
  • Starter motor

Drivetrain Options

  • Front-wheel drive (FWD)
  • Rear-wheel drive (RWD)
  • Four-wheel drive (4WD)

⚙️ Technical Specs

Engine, mass, and performance limits

Mass Requirements

Car Mass 1230 kg (without driver/fuel)
Total Mass 1300 kg (with driver, no fuel)
Fuel Tank 30 liters max
COG Height 0.275 min (with driver, no fuel)

Calculating COG Height

To accurately measure the Center of Gravity (COG) height for validation, follow these steps:

  1. Set all four tires to the maximum pressure allowed.
  2. In the suspension settings, enable the "ZERO SPRING TEST = YES" option.
  3. The value displayed is your official COG height. It must be at least 0.275 m.

This test standardizes the measurement by removing suspension sag as a variable, ensuring a fair comparison for all cars.

Weight Distribution

  • Front-engine: Max 50% rear axle
  • Mid-engine: 55% max front or rear
  • Rear-engine: Max 40% front axle

Engine Specifications

  • Cylinders: 3-8, or 1-2 rotor Wankel
  • Layout: Inline, Flat, or V
  • Size: 1400-7800cc
  • Power: 300 hp & 300 Nm max
  • Redline: 9500 rpm max
  • Inertia: 1.4 - 2.0 multiplier
  • Turbo: Allowed
  • Audio: Gasoline or diesel only

Suspension Options

  • MacPherson Strut (front & rear)
  • Double Wishbone (front & rear)
  • Trailing Arm (rear)
  • Pushrod/Pullrod (rear)

Suspension Mass Constant: 0.200 min

🛞 Wheels & Tires

Specifications for wheels and tire compounds

Wheel Specifications

Diameter 15" - 20"
Width 7" - 8.5"

Tire Specifications

  • Front Compound: SLICK R1 - R4
  • Rear Compound: SLICK R1 - R4
  • Width: 205 - 225
  • Profile: 35 - 45
  • Pressure: 0 - 670 kPa

Aerodynamics

FWD and RWD: Body Drag 0.400 N @ 1 m/s

4WD: Body Drag 0.365 N @ 1 m/s

Interior Requirements

  • Roll cage
  • Racing seat
  • In-car name/number info plate
  • Fully functional rear brake lights

🎨 Body & Visuals

Appearance and modeling requirements

Car Body Rules

  • Exterior must resemble real-life model
  • Fenders may be modified for tire clearance
  • Small touring car-style front wing may be added
  • Small touring car-style rear wing may be added
  • Tires must not clip through wheel arches at full lock

LOD (Level of Detail)

  • LOD1: Primary high-detail model (required)
  • LOD2: Shadow and collision mesh (required)
  • LOD3: Collision mesh alternative (optional)

Collision mesh must follow outer body lines of LOD1. Skin template must be applied to all LODs.

Mass Distribution Rules

  • All object masses must be within car's mass frame
  • Tube masses must follow LOD1 wireframe
  • All masses within LOD3 collision mesh
  • Wheel masses must not extend beyond LOD1 arches
  • Driver position: Left or Right (not center)

Skin & Livery

  • Must include functional skin template
  • Windshield banner with "World Touring 2000" logo
  • In-car driver name/number sticker (recommended)
  • No real-world company logos in LFS mods database
  • Real racing liveries: upload to lfs.net/account/skins