The best way to transform Assetto Corsa Competizione on PC is not installing random car packs: it’s combining custom liveries with SimHub, CrewChief, telemetry analysis, and carefully chosen quality-of-life tools. ACC does not support the huge mod ecosystem found in the original Assetto Corsa, so the smartest setup improves race information, immersion, and consistency without risking corrupted files or Easy Anti-Cheat problems.
That distinction matters. ACC is built on Unreal Engine 4 and Kunos Simulazioni has never offered the same open mod pipeline as the older game. You won’t safely drop in a new Nürburgring layout, Content Manager weather system, or Custom Shaders Patch and expect everything to work. Tools such as SimHub and CrewChief are technically external companion applications, while custom liveries are the closest thing to a native mod category. They’re still the essential PC upgrades because they solve problems you actually feel during a race.
Before changing anything, check the official ACC Steam page for the current game version and DLC requirements. If your wider PC setup is unstable, Steamoz’s guide to stopping crashes and rescuing FPS is also useful background reading, even though its fixes target a different game.
The ACC Mod Reality You Need to Know
Think of ACC modding as a three-layer system. The first layer is safe customization: custom liveries, number boards, helmets, suits, and team branding. The second is external race engineering: SimHub dashboards, CrewChief voice calls, overlays, and telemetry applications. The third is experimental file modification, including Unreal Engine pak replacements and unofficial physics edits. That last category is where most trouble starts.
Custom liveries normally live in Documents\Assetto Corsa Competizione\Customs\Liveries. A livery package typically includes a PNG skin and a JSON file containing the car model, team name, driver information, race number, and sponsor metadata. The game reads these as personal customization rather than new multiplayer content, which is why other players can often see your custom car without installing the same package.
External apps are safer because they read telemetry through ACC’s supported broadcast and shared-memory data rather than replacing the game’s executable. They can display fuel, tyre temperatures, gaps, delta time, brake pressure, throttle position, and opponent locations while leaving the simulation itself untouched.
Do not confuse ACC with the original Assetto Corsa. Content Manager, Custom Shaders Patch, Sol, Pure, and most AC car or track mods are not ACC mods. Installing them into the wrong game folder achieves nothing at best and creates a confusing mess at worst. For official compatibility information, use Kunos Simulazioni’s ACC page and keep the game updated through Steam.
| Tool or Mod Type | What It Changes | Risk Level | Best Use |
|---|---|---|---|
| Custom liveries | Cars, suits, helmets, team identity | Low | Personalizing single-player and multiplayer grids |
| SimHub | Dashboards, overlays, hardware displays | Low | Live race information and button-box integration |
| CrewChief | Spotter, engineer calls, gap warnings | Low | Traffic awareness and endurance racing |
| MoTeC or telemetry tools | Lap-data graphs and setup analysis | Low | Finding braking and corner-exit losses |
| Unofficial pak or physics edits | Game assets or simulation files | High | Only offline experimentation after backups |
🎮 Assetto Corsa Competizione
Looking to experience this game? Grab your digital key directly on our store for $39.99.
View on Steammoz Store →S-Tier ACC Mods and Companion Tools
S-Tier: Custom Liveries
Custom liveries are the easiest recommendation because they add personality without touching handling, tyre physics, or online balance. A well-made GT3 skin can also improve recognition in traffic. In a 30-car field, a bright yellow Lamborghini Huracán GT3 Evo2 or a distinctive purple Porsche 911 GT3 R is much easier to identify than a sea of factory white cars.
Download liveries from reputable ACC communities, inspect the included JSON before installing, and keep one folder per team. Never overwrite your original files blindly. If a package includes only a skin texture, create a matching metadata file with the correct car model and team name rather than guessing. The in-game showroom and a private practice session are the right places to test alignment, mirrored sponsor placement, driver names, and number plates.
S-Tier: SimHub
SimHub is the biggest functional upgrade for a wheel user. It can turn an old Android phone into a dashboard, drive an external Arduino display, or place a compact overlay on a second monitor. For ACC, prioritize fuel remaining, fuel-per-lap, current stint time, tyre pressures, brake temperatures, delta, and position. Those numbers are far more useful than filling the screen with every available sensor.
Set the dashboard refresh rate around 10 to 20 Hz for a phone or low-power display. A 60 Hz hardware display can update faster, but there’s no competitive benefit to pushing a wireless tablet at extreme refresh rates. Keep the main overlay away from the apex view, especially at Spa-Francorchamps and Mount Panorama, where a distracting delta box can hide a braking marker.
S-Tier: CrewChief
CrewChief supplies the race engineer and spotter ACC players quickly learn to miss. It can call cars alongside, warn about yellow flags, report fuel usage, announce pit-lane penalties, and tell you the gap to the next driver without forcing your eyes away from the road. Install the ACC-compatible CrewChief build, choose Assetto Corsa Competizione as the game, select your preferred voice pack, and launch it before entering a session.
The key setting is the spotter verbosity. Maximum chatter sounds impressive for five minutes but becomes noise during a busy start. Use concise calls for nearby cars and keep fuel, damage, and penalty announcements enabled. In endurance races, CrewChief’s remaining-fuel calls are especially valuable because ACC’s built-in information can require too much glance time when you’re managing traffic.
| Rank | Tool | Key Benefit | Who Needs It Most |
|---|---|---|---|
| S-Tier | Custom liveries | Safe visual customization with no physics changes | Every PC player |
| S-Tier | SimHub | Fuel, tyre, delta, and hardware telemetry | Wheel and button-box users |
| S-Tier | CrewChief | Spotting, gaps, flags, and pit communication | League and endurance racers |
| A-Tier | MoTeC-compatible telemetry analysis | Detailed driving and setup feedback | Players chasing repeatable lap times |
| B-Tier | Experimental pak replacements | Offline visual experimentation | Advanced users with full backups |
Use Telemetry to Fix the Laps You’re Actually Losing
Telemetry is where ACC stops being a pretty racing game and becomes a driver-training tool. A stopwatch tells you that the lap was slow; a data trace tells you why. Use an ACC-compatible logger or export your session for MoTeC i2 analysis. Compare a clean reference lap against your best attempt, then inspect brake release, minimum speed, throttle pickup, and steering angle.
Start with three channels instead of drowning in graphs. Brake pressure shows whether you’re braking too early or carrying too much pressure into the apex. Speed reveals whether the problem is entry commitment or a slow rotation. Throttle position exposes timid exits, especially in rear-wheel-drive cars such as the Ferrari 296 GT3 and Porsche 911 GT3 R.
At Monza, a common beginner mistake is braking early for the first chicane and then releasing the pedal too abruptly. The trace shows a long dead period between brake release and turn-in, which means the front tyres aren’t being loaded consistently. Try a smoother release that finishes as you approach the first kerb. At Silverstone’s Luffield, look for throttle oscillation: repeated 20-to-50 percent inputs usually mean you’re asking for acceleration before the car is straight enough.
For tyre work, monitor hot pressures after three or four representative laps rather than immediately after leaving the pits. ACC’s GT3 cars generally reward working toward the game’s recommended hot-pressure window, commonly around 26.0 to 27.0 PSI depending on the tyre model and current version. Don’t treat that range as a magic number for every condition: ambient temperature, track temperature, wetness, and car model all matter. The important mod-assisted workflow is consistency. SimHub shows the live trend; telemetry confirms whether the pressure is stable across a stint.
What to Change First
If the data says you’re losing time in the final third of a corner, don’t immediately add wing or soften the rear suspension. First compare steering angle and throttle. Excess steering lock while accelerating usually means you turned in too early or missed the late apex. If the car rotates but traction-control intervention spikes on exit, try a calmer throttle ramp and review TC settings one click at a time.
| Telemetry Signal | Likely Problem | First Adjustment | What Success Looks Like |
|---|---|---|---|
| Long brake-release gap | Braking too early or releasing abruptly | Move the brake marker gradually and smooth release | Later apex with continuous speed reduction |
| High steering angle on exit | Early turn-in or missed apex | Delay rotation and target a later apex | Earlier throttle with less steering lock |
| Repeated throttle spikes | Unsettled rear or poor line | Use a progressive throttle application | One clean acceleration phase |
| Large left-right pressure split | Uneven load or unsuitable setup | Check camber, pressures, and corner technique | Stable pressures after a full stint |
Make Custom Liveries Look Good Instead of Broken
ACC skin packs often fail because the artwork is technically present but the metadata is wrong. The PNG can look perfect in an image editor and still appear on the wrong car, use the wrong number, or lose its driver name in-game. Check the JSON fields carefully, especially the car model, team identifier, race number, and folder naming. Keep filenames simple: letters, numbers, hyphens, and underscores are safer than exotic symbols.
Use the correct resolution supplied by the livery creator. Upscaling a 2,048-pixel texture to 8K won’t create detail; it only increases memory use and can contribute to stutters when a large grid loads. For a normal 1080p or 1440p display, a clean 2K skin is usually the sensible compromise. Save a backup of the entire Customs folder before replacing a team package.
Test in three situations: showroom, solo practice, and a multiplayer lobby. The showroom catches missing textures. Practice reveals reflections, wheel-arch alignment, and driver suit issues. Multiplayer confirms that the livery loads without causing a long join or obvious texture pop-in. If the game refuses to load a skin, remove the newest package first rather than deleting the entire folder.
For league racing, use a consistent naming scheme such as TeamName_CarNumber_Event. That makes it much easier to locate a broken entry after a season of downloaded liveries. It also keeps your custom grid manageable when ACC has accumulated several versions of the same GT3 team.
Graphics and Performance Settings That Keep Mods Smooth
External dashboards and voice tools are light, but high-resolution custom textures, large grids, and Unreal Engine effects can still expose a weak CPU or limited VRAM. ACC cares about frame-time consistency more than a flashy peak FPS number. A locked 72 FPS in VR or 90 FPS on a capable monitor is preferable to swinging between 110 and 55 FPS while cars appear at the apex.
The Steam-listed minimum target is an Intel Core i5-4460 or AMD FX-8120, 8GB of RAM, and a GTX 460 2GB or Radeon HD 7770. That hardware can launch ACC, but it’s not a comfortable modded-racing baseline. A modern six-core processor, 16GB of RAM, and a GTX 1070-class GPU or better provide much more room for a 20-to-30-car grid and SimHub running in the background.
| Setting | Recommended Profile | FPS Impact | Visual Note |
|---|---|---|---|
| View Distance | High | Medium | Protects distant cars and track detail |
| Shadows | Medium or High | High | Lower this before texture quality |
| Effects | Medium | Medium to High | Controls smoke, sparks, and heavy weather load |
| Foliage | Medium | Medium | Small gain with limited cockpit impact |
| Textures | High if VRAM allows | Low to Medium | Improves liveries and car surfaces |
| Anti-aliasing | Temporal AA High | Medium | Reduces shimmering on fences and kerbs |
| Mirror Quality | Medium | High | Mirrors render an additional scene |
| Foliage and mirror distance | Medium | Medium | Useful compromise for crowded races |
Start with shadows and mirrors when you need more FPS. Lowering textures often makes custom liveries look worse while delivering a smaller gain than expected. If you use a phone dashboard through Wi-Fi, keep SimHub’s update rate sensible and close unrelated overlays such as browser hardware acceleration, recording software widgets, and unnecessary RGB utilities.
For troubleshooting, change one variable at a time and run the same five-lap test at the same circuit, weather, and grid size. ACC performance at a clear morning session tells you almost nothing about a 30-car night race at Spa. You can also compare this workflow with Steamoz’s max-FPS settings guide and its higher-FPS settings advice for general PC optimization principles.
A Safe Installation Order for Your ACC PC Setup
Install the visual layer first, then the information layer. Download and test one custom livery pack. Once it works, add SimHub and verify that fuel and tyre data update correctly. Install CrewChief next and check that it recognizes the ACC session. Only after those pieces are stable should you add a telemetry logger or MoTeC workflow.
- Back up your documents folder. Copy
Documents\Assetto Corsa Competizioneto another drive before changing liveries or configuration files. - Update ACC and drivers. Run the current Steam build and install a stable graphics driver rather than mixing an old driver with a new Unreal Engine update.
- Add one trusted livery pack. Test it offline, then check a private multiplayer lobby.
- Configure SimHub. Begin with fuel, tyre pressure, delta, position, and brake bias; remove clutter later.
- Configure CrewChief. Choose ACC, test the spotter, and reduce unnecessary callouts before a league race.
- Analyze a repeatable session. Drive five clean laps at one track and compare braking and throttle traces.
- Leave pak and physics edits alone for online racing. If you experiment, use a separate backup and an offline profile.
These tools are complementary rather than competing mods. CrewChief tells you a car is beside you; SimHub shows the gap and fuel; telemetry explains why your last sector is slow; a custom livery makes the whole grid easier to read. That combination changes the feel of ACC far more than a questionable graphics injector ever will.
The result is a cleaner, more informative sim-racing experience: fewer glances at menus, better traffic decisions, more disciplined setup work, and a grid that feels like your own championship. If you want more PC troubleshooting ideas, Steamoz also covers crashing and low-FPS fixes; just remember that ACC’s biggest gains come from frame-time testing, not blindly copying another game’s settings.
For the official simulation, DLC details, and supported updates, keep the ACC Steam listing bookmarked. Install slowly, back up often, and treat anything that changes physics or packaged game files as experimental. That’s how you get the best essential mods for Assetto Corsa Competizione PC without turning your next race into a file-repair session.