Track Impulse Overlays

ACC Overlays.
Ten Panels, Free.

Track Impulse runs 10 overlays in Assetto Corsa Competizione, plus up to 12 build-your-own widgets: a full dashboard, a shift light, the relative, standings, a fuel calculator, session info, a delta trace, a race recap card, Twitch and YouTube chat, and a live haptics HUD. Transparent, draggable panels over the sim. No SimHub, no plugin folder, nothing to assemble. Free during beta.

Download Free Beta What Works in ACC
10 ACC overlays 12 custom widgets Free during beta No SimHub
Live in-browser preview
ACC support

Which Overlays Work in
Assetto Corsa Competizione?

Ten overlays run in ACC, plus up to 12 build-your-own widgets. Seven do not, because ACC's shared memory does not publish what they need. Below is the straight answer, panel by panel. I would rather you knew before you installed than found an empty box on your screen mid-stint.

Overlay
What it shows in ACC
In ACC
Dashboard
Full instrument cluster: 270 degree tacho, gear, speed, rpm, steering, a 5 second input trace, pedal bars, G-force and telemetry cells including TC, brake bias, wetness and rain
Yes
Shift light
Standalone upshift light, green to amber to red with a blue flash at the optimal shift point, in five styles with an optional gear digit
Yes
Relative
Cars immediately ahead and behind sorted by interval, with position, car number, driver name, manufacturer badge, gap and last lap
Yes
Standings
The field in class order with gap to the leader, best lap and last lap, your row pinned in view
Yes
Fuel calculator
Litres in tank, per-lap burn learned from clean laps, pit window countdown and fuel to add at the stop
Yes
Session info
Air and track temperature, rain chance, track wetness, time remaining and live flag state
Yes
Delta trace
A continuous delta graph against your best or last lap, full or compact height, so you see time gained and lost as you drive
Yes
Race recap card
A shareable post-race card with your finish, positions gained and best lap, exported as an image
Yes
Haptics HUD
A live level meter for each of your eight bass shaker effects, plus master, read straight from Track Impulse
Yes
Twitch and YouTube chat
One merged read-only chat feed, a Featured card to pin a message, and a bot that answers viewer commands from live telemetry
Yes
Custom widgets, up to 12
Text panels of any data field, visual gauges, delta and fuel bars, a live heart rate readout and more
Yes

Not available in ACC

How a No behaves

An overlay ACC cannot feed is simply off, and says Not available on this sim if you switch it on anyway. Where ACC publishes nothing for a single field, that field reads N/A rather than a made-up number. You are never left guessing whether it is the sim or the app. The full ten-sim matrix lives on the overlays page.

01 / Dashboard

The ACC Dashboard Overlay:
Your Whole Car, One Cluster.

The dashboard overlay is a full sim racing instrument cluster in a single panel. A 270 degree tachometer with gear, speed and rpm sits in the centre, steering and a live 5 second input trace on the left, a telemetry grid with throttle, brake and clutch bars and a G-force dial on the right. ACC feeds the cells GT3 drivers actually watch: traction control, brake bias, track wetness and rain. The whole cluster scales from one size slider, and a cell the sim cannot fill simply hides.

  • 270 degree tacho with gear, speed and rpm
  • Steering readout and a 5 second input trace
  • Throttle, brake and clutch bars plus a G-force dial
  • TC, brake bias, wetness and rain cells from ACC
Live in-browser preview
Live in-browser preview
02 / Relative

The ACC Relative Overlay:
Who's Coming, And How Fast.

The relative lists the cars immediately ahead and behind you on track, ordered by interval in seconds rather than race position. It is the panel you glance at to know who is closing, who you are about to be lapped by, and whether the car behind is quicker than the gap suggests. In a 60 minute ACC GT3 race that single glance is the difference between a clean overtake and a drive through.

The car column carries the real manufacturer badge, not a truncated name, so you read the field by shape. The badge lights up the moment that car comes within a second of you, and the interval turns red inside half a second. Every column can be toggled and reordered. ACC publishes no iRating, safety rating or strength of field, so those columns simply are not there.

  • Sorted by proximity on track, not by standings
  • Live interval, red when a battle is inside half a second
  • Manufacturer badge that lights up inside a one second battle
  • Gap, last lap and your own row pinned in the middle
03 / Standings

The ACC Standings Overlay:
The Class Order, Leader to Last.

The standings overlay shows where you sit in your own class, sorted by class position with the leader at the top. In a mixed GT3 and GT4 grid it splits the field into class blocks, so a GT4 driver is never buried under eight GT3 cars. Each row gives position, car number, driver name, gap to the class leader, best lap, manufacturer badge and last lap.

Your row stays pinned in view even when the order runs deeper than the panel, and the class-fastest lap is highlighted. Set it to show only while you are in the car, or leave it up in the garage between stints.

  • Split into GT3 and GT4 class blocks with a car count
  • Gap to the class leader, best lap and last lap
  • Manufacturer badge instead of a truncated car name
  • Your row pinned, class-fastest lap highlighted
04 / Fuel

The ACC Fuel Calculator:
The Maths, Done For You.

The fuel calculator learns your per-lap burn rate over a few clean laps, then shows litres in tank, a pit window countdown in laps or minutes, and exactly how much to add at the next stop. The pit call, your lap and the fuel margin stay pinned in the footer. Four layouts, from a compact strip to the full card.

ACC endurance racing is a fuel game before it is a pace game. This is the panel that stops you splashing two litres more than you need and losing three seconds in the pit box, and it needs no spreadsheet and no SimHub plugin.

  • Litres in tank and a live tank bar
  • Pit window countdown in laps or minutes
  • Per-lap burn learned from your clean laps
  • Fuel to add at the stop, with your margin
Live in-browser preview
Live in-browser preview
05 / Shift Light

The ACC Shift Light:
Upshift on Instinct, Not Guesswork.

A standalone upshift indicator you place anywhere on screen, right in your sightline. It fills green, then amber, then red, and flashes blue at the optimal upshift point, following the shift rpm ACC reports for the car you are driving, or the redline trimmed by up to 500 rpm where a car does not expose it.

Pick the look that reads fastest for you: five styles, from a simple block, bar, ring or meter to the round Apex dial above, each with an optional gear digit. It sits independent of every other panel, so it never competes with the rest of your layout.

  • Green to red to a flashing blue at the optimal shift
  • Follows the car's shift rpm, trimmable by 500 rpm
  • Five styles: block, gauge, ring, meter and Apex dial
  • Optional gear digit, placed anywhere you want
06 / Session

The ACC Session Overlay:
Weather and Clock, At a Glance.

ACC races on a live weather model, and the session strip is where you read it. Air and track temperature, rain chance, track wetness, time remaining and the live flag state, all in one panel. Five numbers you would otherwise be pulling up ACC's own MFD for while braking into Eau Rouge.

Wetness is the one that matters most here. Watching it climb tells you a wet tyre stop is coming several laps before the track actually looks wet.

  • Air and track temperature
  • Rain chance and live track wetness
  • Time remaining and flag state
  • Anything ACC does not publish reads N/A, never a guess
Live in-browser preview
Live in-browser preview
07 / Haptics HUD

The Haptics HUD:
See What Your Bass Shakers Are Doing.

This is the one overlay no rival can match. Because it reads straight from Track Impulse, the strip shows a live level for each of your eight bass shaker effects at the same instant your shakers fire them, with the master level alongside. Road vibration, slow suspension, kerb, engine, ABS lock, gear change, wheel slip and native kerb, each with its own meter.

It is the fastest way to tune your effects in ACC: drive a few laps at Spa and see at a glance whether ABS is firing under braking for Les Combes, whether suspension is saturating over the Eau Rouge compression, or whether an effect you thought was on is sitting flat. Pair it with the per-effect controls on the effects page and you tune by eye as well as by feel.

08 / Twitch Bot

Twitch and YouTube Chat:
Chat Asks. The Overlay Answers.

Every overlay app can put your chat on screen. Track Impulse also ships an interactive bot: viewers type a command and it answers in chat from the same live telemetry the overlays use, within a second or two. In ACC that covers commands like !fuel, !lap, !gap, !weather, !car and !track. Wear a heart rate monitor and !hr lets chat check your pulse three wide into Turn 1 at Monza.

The chat panel itself merges Twitch and YouTube into one read-only feed over the sim, with a Featured card to pin a message on screen. Standalone chat bots exist, but they are a second app to install and run. Here the bot lives inside the overlays: one install, next to your relative and fuel card.

  • Commands answered from live ACC telemetry
  • !hr reads your heart rate monitor live
  • Merged Twitch and YouTube feed with a Featured pin card
  • Built into the overlay app, no separate bot to run
Also included

Three More ACC Panels
And 12 You Build Yourself.

Not every panel needs a full section. These three also run in Assetto Corsa Competizione, and every one of them toggles on and off on its own, so a minimal HUD stays minimal.

Delta trace

A continuous delta graph against your best or last lap, in full or compact height. You see time gained and lost as you drive, not just at the line.

Race recap card

A shareable post-race card with your finish, positions gained and best lap, exported as an image for Discord or your league thread.

Custom widgets, up to 12

Build your own panels: text readouts of any data field, visual gauges, delta and fuel bars, a live heart rate readout. Twelve slots.

Drag and lock

Drag any panel into position, then press F6 to lock the layout so nothing moves once you are racing.

Per-panel opacity

Tune background colour, opacity and content opacity per panel. Nearly invisible until needed, or solid enough to read at a glance.

Ultrawide friendly

Wide horizontal layouts that suit the top or bottom edge of an ultrawide or standard display, out of your sightline.

One install, two jobs

The Same App Drives
Your Bass Shakers.

Track Impulse is a low-latency bass shaker engine with an overlay suite attached, not the other way around. Telemetry reaches the shaker in as low as 2ms end to end. Measured head to head against SimHub in iRacing on the same rig, Track Impulse delivered 8ms against SimHub's 137ms. That is the difference between feeling the kerb and feeling a memory of it.

No other overlay app does this. RaceLab, iOverlay, irDashies and Edge are overlays only. SimHub drives shakers but is the tool the 137ms figure came from. Track Impulse is one install for your ACC overlays and your tactile feedback, and the haptics HUD above exists precisely because both halves are the same program. It works with any sound card, and if you never plug in a bass shaker the haptic engine simply sits idle.

How it compares

The Best ACC Overlays:
Track Impulse vs RaceLab, iOverlay, irDashies, Edge and SimHub.

Most of the well-known iRacing overlay apps do not run in ACC at all. iOverlay, irDashies and Edge are iRacing only, which leaves RaceLab, SimHub and Track Impulse as the real choices for Assetto Corsa Competizione. Every Track Impulse overlay is free during beta.

Feature
Track Impulse
RaceLab
iOverlay
irDashies
Edge
SimHub
Runs in ACC
Yes
Yes
iRacing only
iRacing only
iRacing only
Yes
Price
Free during beta
Free, $4.90/mo Pro
Free, €4.95/mo Pro
Free, open source
Free
Free, license from €5
ACC relative and standings
Free
Free
No
No
No
Community dashboards
ACC fuel calculator
Free
Pro only
No
No
No
Community dashboards
Interactive Twitch bot
Free, interactive
Chat display only
Chat display only
Chat display only
Not listed
Chat display only
Live haptics HUD
Yes
No
No
No
No
No
Built-in bass shaker engine
Yes, low-latency
No
No
No
No
Yes
Supported sims
10 sims
8 sims
iRacing only
iRacing only
iRacing only
100+ sims
Setup
Ready to use
Ready to use
Ready to use
Ready to use
Ready to use
Assemble dashboards

Prices and features checked from each vendor's own site or repository in July 2026. Free tiers and paid plans change, so confirm at the source before you buy. Cells marked Not listed could not be confirmed from the vendor's site. iOverlay, irDashies and Edge are good iRacing tools; they simply do not read ACC. SimHub also drives bass shakers, so the difference there is latency and the live haptics HUD, not haptics on their own.

Setup

Set Up Your ACC Overlays
in Three Steps.

There is no plugin folder, no dashboard to assemble and nothing to copy into your ACC install. From download to a working HUD is a few minutes.

Install Track Impulse and tick the overlays

Run the installer and tick the overlays component during setup. The overlays are free during beta whether or not you use the bass shaker side of the app.

Launch ACC and switch on the panels you want

The app detects Assetto Corsa Competizione and switches to it automatically. Turn on the relative, standings, fuel calculator, dashboard or any of the other panels from one tabbed Settings window. Outside a supported sim the overlays stay hidden.

Drag them into place, then lock

Every panel is draggable and resizable. Put the relative where your eyes already go, the fuel card out of your sightline, then press F6 to lock the layout. The overlays guide covers every setting on every panel.

FAQ

ACC Overlays:
Common Questions.

Are the ACC overlays free?
Yes. The overlays are free during beta. Tick the overlays component during setup and they run alongside the haptic engine, or on their own if you do not use bass shakers.
How many overlays work in Assetto Corsa Competizione?
Ten, plus up to 12 build-your-own widgets: dashboard, shift light, relative, standings, fuel calculator, session info, delta trace, race recap card, Twitch and YouTube chat, and the haptics HUD. Seven panels are not available in ACC because the sim does not publish the data they need. The table above lists both sides.
Is there a radar or spotter overlay for ACC?
No. The Track Impulse radar spotter needs relative car positions that ACC does not publish, so it runs in iRacing and Le Mans Ultimate only. ACC does have its own in-game proximity indicator in the HUD options. If you race iRacing as well, the iRacing radar covers all three of its views there.
Do I need SimHub for ACC overlays?
No. Track Impulse overlays run on their own: no SimHub, no plugins, no dashboard building. Every panel ships ready to use. SimHub builds its overlays from community dashboards you assemble yourself; here you tick a box during install and race.
Do the overlays work in VR?
Not yet. The panels draw on your monitor, not inside the headset, so they are built for single screen and triple screen rigs, including ultrawides. Wide horizontal layouts suit the top or bottom edge of the display, out of your sightline.
Do I need bass shakers to use the ACC overlays?
No. The relative, standings, fuel calculator, dashboard and the rest all run on their own. The haptics HUD is the only panel that needs bass shakers, and it simply sits idle if you do not have any. The haptic engine is the other half of the same install, delivering telemetry to the shaker in as low as 2ms.
Which other sims do these overlays run in?
Ten in total: iRacing, Le Mans Ultimate, Assetto Corsa Competizione, Assetto Corsa, Assetto Corsa EVO, Assetto Corsa Rally, Automobilista 2, F1 25, Euro Truck Simulator 2 and BeamNG.drive. The app detects which one you are running and switches automatically. The full per-sim matrix is on the overlays page.
Get the ACC overlays

Download Track Impulse Free

Install Track Impulse, tick the overlays during setup, and your ACC HUD is on screen for the next race. Ten panels, 12 custom widgets, plus low-latency bass shaker haptics from the same app. Free during beta. No credit card.

Download Free Beta See the Full Suite
Related Guides
→The Full Overlay Suite: Every Panel, Every Sim →Overlays Guide: Every HUD Panel Explained →Assetto Corsa Overlays: AC, EVO and Rally →The iRacing Fuel Calculator Overlay Explained →The Free iRacing Radar: Three Spotter Views Explained →Sim Racing Haptic Effects Explained: The Seven Effects →Why Bass Shaker Software Is Slow: The Latency Stack Explained →Track Impulse User Guide: First-Time Setup →Download Track Impulse Free During Beta