The fastest way to waste 20 minutes fixing AC Evo SimHub lag is to search for a UDP setting that isn’t there.

AC Evo hands its telemetry to SimHub through shared memory on the PC, so the “cap the UDP frequency” and “change the broadcast IP” advice floating around belongs to other games. For this setup, the fix comes down to one of 6 things: SimHub version, Windows firewall, network profile, tablet connection, IP address, or dashboard load.

Start with the PC and work outward to the tablet. Doing so saves time, and it stops you from blaming your Wi-Fi for a telemetry profile that broke after an AC Evo patch.

Image Source: AC Evo

Update SimHub Before You Touch Anything Else

AC Evo is still in Early Access, and Kunos has already changed how the game shares telemetry. Update 0.6 swapped out the shared memory library and broke SimHub, Moza Pit House, and a stack of other tools overnight. SimHub shipped a fix within days, but anyone who didn’t grab it was staring at a frozen dash and blaming their Wi-Fi.


AC Evo’s SimHub-readable telemetry comes through shared memory on the PC. That means old UDP advice doesn’t apply here. There’s no AC Evo UDP frequency setting to cap, and there’s no broadcast IP target to clean up.

A version mismatch can look exactly like network trouble. The dash opens and the layout loads; then the data freezes, turns up late, or never arrives.

So before touching firewall rules, router settings, or dashboard files, update SimHub. Then check that AC Evo is set as the active game inside it. If SimHub is running an old game profile, the tablet can’t fix that. It’s only showing what the PC gives it.

If your dash broke right after an AC Evo patch, treat the patch as the suspect. Update 0.8 landed on 9 July 2026, and every major patch carries the same risk. Install the newest SimHub, restart it, then launch AC Evo again.

The restart matters. Don’t update SimHub, leave everything open, then wonder why the dash still acts drunk.

Check Whether It’s Dash Lag or Game Stutter

AC Evo SimHub lag usually shows up in one of two ways.

The game feels fine, but the dash is late. You shift into 4th and the tablet still says 3rd. RPM LEDs chase the engine sound. Speed, fuel, delta, or gear data update in little jumps. That points toward SimHub, the network, the tablet, or the dashboard itself.

Game stutter feels different: the whole screen freezes for a moment, steering feels delayed, and the car jumps forward after a hitch. Audio might crackle, too. When the PC is struggling, the dash lags as a side effect.

One quick test tells you which problem you have. Run AC Evo without the tablet dash open: same car, same track, same session length. If the game still stutters, deal with AC Evo performance first.

If the game runs clean without the tablet, open SimHub again and watch the dash. A delayed dash with smooth gameplay means the data is choking somewhere between the PC and the tablet. That’s where firewall, Wi-Fi, IP, browser, and dashboard load come in.

Fix the Windows Firewall and Network Profile

Keep your home racing network on Private.

The tablet dash is a web page served by a small web server on your PC, so the connection comes in from the tablet, and Windows Firewall has to let it through. SimHub’s troubleshooting guide names ports 8888 and 8889 as the defaults. A “Public” profile can get in the way of the local incoming connection your tablet needs, which is why SimHub tells users to keep the PC network set to “Private” and allow ports 8888 and 8889.

Open Windows Settings, check your active network profile, and switch it to “Private” if it’s on “Public.” Then go to Firewall & Network Protection in Windows Security and allow SimHub through, making sure it’s ticked for “Private” networks. If you run Norton, Bitdefender, Avast, McAfee, or another security suite, check that firewall too. Third-party firewalls can block SimHub while Windows looks innocent.

Now test the tablet with the mobile access link shown inside Dash Studio. If the page won’t load at all, the firewall or network path is still blocking it. If the page loads but the data stutters, keep going.

Image Source: AC Evo

Keep Your Tablet and PC on the Same Network

The tablet and PC need to be on the same local network. SimHub’s guide is blunt about this. If the tablet is on guest Wi-Fi, a mesh extender with its own subnet, or a hotel-style network that isolates devices, the dash can load badly, reconnect, or fail completely.

A wired PC and a Wi-Fi tablet are fine, as long as both are connected to the same router. Skip guest Wi-Fi and switch off any VPN while testing. Repeaters cause trouble too when they drop Wi-Fi devices onto their own subnet. If you run a mesh system, test with the tablet near the main router before blaming SimHub.

Reboot the router if the dash lag started without any AC Evo or SimHub change. Some routers get messy after weeks of uptime, and SimHub’s guide lists a router reboot as a fix for lag and random disconnects.

Then run a short test. Open the dash, sit in the pits, blip the throttle, and shift up and down. If gear and RPM still arrive late while the game is smooth, keep going.

Stop the IP Address Changing Mid-Setup

Don’t trust an old SimHub bookmark.


Your PC’s local IP can change after a router reboot, a Windows update, or a quiet DHCP lease refresh, and SimHub’s docs flag this as a common reason dashes stop connecting. Open SimHub on the PC, find the current mobile access address inside Dash Studio, and type it into the tablet browser exactly as shown.

Use http, not https. Plenty of mobile browsers try to “fix” local addresses by forcing HTTPS, which kills the connection. The address should look like this:

http://192.168.x.x:8888

If the dash works on the fresh address, save the new bookmark and bin the old one.

For a permanent fix, reserve the PC’s IP in your router. The wording depends on the brand, but you’re looking for “DHCP reservation,” “address reservation,” or “static lease.” Set it for the PC running SimHub, restart the router and PC once, and the same address will keep working from then on.

Lower SimHub’s Dash Update Load

Older tablets choke on busy dashes no matter how clean the network is. The dash loads, but animations hitch, page swipes feel heavy, and the same dashboard runs better on a newer phone.

Open SimHub’s Dash Studio settings and reduce the dash update speed. If your version has the data update control option, turn it on for testing. SimHub’s guide says it slows the data sent to the device and stops a weak tablet or busy network from getting buried.

For a tablet dash, 30fps is usually enough. Setting it to 60fps looks nicer on a strong device, but a weak Android tablet will feel more consistent at 30fps over a full race. If you’re on the free version, check the frame-rate limit too. SimHub support threads regularly point out that unlicensed dashboards run at 10fps, while licensed setups can target much higher rates.

Don’t judge it from the garage screen. Drive 3 laps and watch gear, RPM, speed, fuel, and delta. If the lag improves after lowering the update speed, the tablet was struggling with the load. Keep the lower setting, or run a lighter dashboard for AC Evo.

Clean Up the Tablet Side

A weak tablet can make a good SimHub setup feel broken.

Close background apps first. Kill YouTube, Discord, browser tabs, screen recorders, and anything else running in the background, then reopen the dash in one fresh browser tab.

Browser choice matters more than people expect. Some stock Android browsers run old web engines, and Dash Studio pages behave poorly on them. Chrome on Android, Safari on iPad.

Keep the tablet awake while testing too. Turn off aggressive battery saving, plug it into power if the battery is low, and stop it dimming the screen mid-session. Battery savers throttle background processes, and the dash connection is exactly the kind of thing they throttle.

If the gear number now updates cleanly but animations still hitch, the tablet is probably old or overloaded. Run a simpler dashboard for AC Evo, or drop the SimHub update speed again. And if nothing changes at all, load the same dash on your phone. A newer phone running it cleanly tells you the tablet is the weak point.

Test With a Default SimHub Dash

Custom dashboards are heavier than they look. Huge images, too many widgets, bad formulas, plugin calls that keep retrying in the background. The dash might look perfect in a screenshot and then crawl once AC Evo starts feeding it live data.

Open a default SimHub dash and run the same test: same car, track, session, and tablet as before. Watch the basics, meaning gear, RPM, speed, fuel, and delta. If the default dash runs smoothly and your custom dash stutters, the problem is the dashboard file.

Check whether the custom dash uses extra plugins and remove anything you don’t need for AC Evo. If the dash has multiple pages, test the simplest page first. Big track maps, live timing boards, animated LEDs, and layered overlays all add work.

One broken widget can drag the whole thing down. SimHub retries a failed formula every 30 seconds, so a single bad widget produces that on-off hitching that never quite goes away. If you built the dash yourself, open it in the editor and check for formula errors. If you downloaded it, look for a newer version or comments from other AC Evo users.

A lighter dash that updates cleanly is better than a gorgeous one that tells you the gear after the braking zone.

Image Source: SimStaff

Stop chasing settings when the same fault survives the clean test. This means SimHub is updated, the PC network is “Private”, firewall access is allowed, the tablet and PC are on the same network, the IP address is current, update speed is lower, the tablet is clean, and a default dash still lags.

At that point, you’re looking at something more specific: router isolation, antivirus rules, Windows network weirdness, CPU spikes, a dashboard or plugin conflict, or AC Evo telemetry breaking after a patch.

Write down what you tested before asking for help:

  • AC Evo version
  • SimHub version
  • Tablet model and browser
  • Whether the PC is wired or on Wi-Fi
  • The SimHub mobile URL you used
  • Whether the default SimHub dash lagged
  • Whether AC Evo stuttered without the dash open

That saves a lot of back-and-forth, whether you’re posting on a forum or talking to us.

Need help figuring out whether it’s SimHub, Windows, your network, or the tablet? Book a free consult with SimStaff, and our remote support can walk the whole chain with you while you sit in the rig.