LapMeta Modification Rules
LapMeta Modification Rules
directions_car
Stock Class
- OEM tires must be retained (tires are the key difference between Stock and Light).
- No mechanical modifications to suspension, brakes, engine, or drivetrain.
- Alignment adjustments are permitted.
- Safety equipment allowed: racing seat, harness, harness bar.
build
Light Modification Class
- Non-OEM tires permitted (R-compound, Hoosier slicks, etc.).
- Aftermarket brake pads and rotors allowed (stock calipers required).
- Air filter upgrade acceptable.
settings
Medium Modification Class
- Aftermarket suspension systems (coilovers, sway bars, etc.).
- Full aftermarket brake system (big brake kit with upgraded calipers).
- Aerodynamic modifications (splitter, wing, diffuser beyond OEM).
- Engine tuning permitted (stock turbo/supercharger must be retained).
- Exhaust upgrades (headers, catback, downpipe, etc.).
- Weight reduction through removal of seats, carpet, and trim.
- LSD swap or drivetrain upgrades.
- Air intake system upgrades (cold air intake, intake manifold, throttle body).
- Suspension geometry components (control arms, camber plates, toe arms).
engineering
Heavy Modification / Race Car Class
- Any car with a full roll cage is automatically classified as a race car.
- Engine swap or built engine internals.
- Aftermarket forced induction (turbo/supercharger added or upgraded).
- Extensive weight reduction or widebody modifications.
- The car must maintain a recognizable appearance to qualify as that model.
Class Podium Rules
LapMeta establishes fair competition brackets for track day lap competitions using eight distinct achievement categories plus an overall standings category. Podium positions award the top 3 unique drivers per category based on fastest single lap times, excluding flagged or superseded laps. A class must have at least 3 unique drivers before medals are awarded.
| Class | Tire UTQG | Modifications | Price Limit | Car Type | Notes |
|---|---|---|---|---|---|
| Street | 200+ TW | Up to Light | < $65,000 | Street only | Popular 200tw class for stock to lightly modified street cars |
| Street Mod | 100+ TW | Up to Medium | < $90,000 | Street only | Performance DOT tires on street-to-medium builds with higher price cap |
| Prepared | Any | Up to Heavy | < $150,000 | Street only | Heavily modified track cars on any tires |
| Competition | Any | Up to Race | < $180,000 | Any | Purpose-built track vehicles on competition slicks |
| Supercars | 60+ TW | Up to Medium | ≥ $120,000 | Street only | High-end vehicles with performance tires |
| Legends | Any | Up to Medium | Any | Street only | Vehicles 20+ years old, heritage over modifications |
| Momentum | Any | Up to Medium | Any | Street only | Power-to-weight ≤0.075 HP/lb, handling dynamics focus |
| Grassroots | Any | Any | < $30,000 | Street only | Budget builds with unrestricted modifications, excludes OEM race cars |
| Overall | Any | Any | Any | Any | Absolute fastest lap, no restrictions |
UTQG Treadwear Buckets
- 0-99: Competition slicks / R-compound tires
- 100-140: Extreme performance street tires
- 141-200: High performance street (traditional 200tw)
- 201+: All-season/touring tires
Modification Levels
- Stock: Factory stock, no modifications
- Light: Intake, exhaust, alignment, lightweight wheels
- Medium: Suspension, brakes, some power mods
- Heavy: Significant power/weight changes, still street-driven
- Race: Purpose-built track cars, not street legal
Technical Details
- Price Determination: Uses vehicle instance current value, then base vehicle market value, then original MSRP.
- Tire Data: Uses vehicle instance front tire, or base vehicle front tire if not specified.
- Street vs Race: "Street only" categories exclude purpose-built race cars (Radical SR3, Formula cars, sports racers) regardless of modification level.