Assetto Corsa Competizione Setup

Host your Assetto Corsa Competizione server for GT3/GT4 racing with dynamic weather, endurance events, and driver swap support. This guide covers setup, championship configuration, and league operations.

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Choose Your Plan

Plan	Best For	Driver Capacity
Starter	Private practice, solo or coaching sessions	~10 drivers
Pro	Weekly leagues, community races, public servers	~20 drivers
Premium	Endurance events, driver swaps, dynamic weather	~30 drivers

Tip

When to upgrade: If CPU latency spikes during rain/night transitions or replays consume more than 80% of storage, consider a higher tier.

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Quick Start

1. Create your server

   Go to panel.mambahost.com → Create Server → Assetto Corsa Competizione

2. Select your plan and deploy

   Choose your plan and region — deployment completes in about 2 minutes

3. Download your config files

   Get SFTP credentials and default JSON configs from /cfg

4. Enable backups

   Configure auto-backups before uploading custom entry lists

5. Configure and start

   Edit your championship settings and launch the server

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Championship Configuration

Key Config Files

File	Purpose
server_cfg.json	Server name, requirements, max clients
event.json	Sessions, weather, time multiplier
entrylist.json	Teams, cars, drivers, ballast

1. Edit server_cfg.json — set trackMedalsRequirement, safetyRatingRequirement, and maxClients

2. Define sessions in event.json — practice, qualifying, race, weather conditions

3. Populate entrylist.json — teams, car models, race numbers, ballast values

4. Configure BoP adjustments — ballast and restrictors per car as needed

5. Include multiple drivers for endurance swap events

Note

For endurance leagues, all drivers must be assigned to the entry and present on the server for swaps to work.

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Race Formats

Sprint Racing

• Short practice, qualifying, and race sessions
• Single-driver entries
• Standard weather conditions

Endurance Events

• Extended sessions with driver swaps
• Time multipliers for day/night cycles (e.g., timeMultiplier: 6 for 4-hour events)
• Dynamic weather with rain transitions

Mixed-Class Racing

• GT3, GT4, and Porsche Cup combined
• Separate BoP configurations per class
• Custom entry lists for each class

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Weather & Time Control

// event.json weather example
{
  "cloudLevel": 0.3,
  "rain": 0.2,
  "weatherRandomness": 3,
  "ambientTemp": 22,
  "trackTemp": 30
}

Setting	Description
cloudLevel	0.0 (clear) to 1.0 (overcast)
rain	0.0 (dry) to 1.0 (heavy rain)
weatherRandomness	0-7, higher = more variation
timeMultiplier	Accelerates day/night cycle

Caution

Dynamic weather plus headlights increases CPU usage. Consider reducing grid size during rain/night sessions.

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League Operations

Task	Recommendation
Run shakedown sessions	Verify liveries before official races
Version control configs	Store JSON files in git for rollback
Archive replay files	Essential for protests and highlights
Publish BoP adjustments	Share steward rulings after each race
Script driver swap reminders	Use Discord bots for endurance events

1. Use Broadcast mode or third-party overlays for streaming

2. Export results via the built-in results system for championship tracking

3. Archive replays (.json + .tmp files) to object storage

4. Schedule restarts between events to archive data and clear memory

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Custom Liveries

1. Create liveries in ACC’s livery editor

2. Deploy to /Customs folder via SFTP

3. Reference in entrylist.json with correct folder names

4. Run a shakedown to verify all drivers have required liveries

Tip

Custom liveries must follow ACC’s checksum requirements. Mismatched liveries will cause connection rejections.

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Performance Tips

Recommendation	Why
Reduce grid size during rain	Dynamic weather increases CPU load
Schedule restarts between sessions	Archives data and clears memory
Use static weather for large grids	More stable performance
Test weather transitions offline	Catch issues before race day

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Common Issues

Problem	Solution
Checksum mismatch	Ensure custom liveries are deployed to /Customs with correct folder names
Weather not changing	Confirm isFixedConditionQualified/isFixedConditionRace are false
Driver swaps failing	All drivers must be assigned to entry and present on server
Ping spikes during rain	Reduce grid size or upgrade to Premium
Entry list errors	Verify forcedCarModel matches driver’s game garage

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Helpful Links

Version Mismatch Fix update and version errors

Connection Issues Troubleshoot connection problems

Server Won't Start Fix crash loops

Panel Guide Learn panel features

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Need Help?

• Support: support@mambahost.com
• Discord: Join our server