LapSmith v0.1.24

v0.1.24 — tyre-temp tuning works properly, and it stops second-guessing good changes

A few substantial fixes this release, all from real session logs.

• Tyre-temp reading is reliable now. It reads the in-game Heat screen's 3-zone temps consistently instead of hit-and-miss, so camber and toe actually get tuned from real tyre data on tarmac rather than guessed from lap time.
• It keeps changes that the telemetry proves worked. Before, a change that clearly fixed a real problem (bottoming, a locking wheel, uneven tyre temps) could still get reverted just because your lap times were dropping as you warmed up. Now, if the telemetry shows the fix actually worked, it keeps it — while still not taking credit for gains that were just you driving better.
• Less button-pressing. You only press F8 to confirm you've applied a change. The "just drive this lap again" steps now advance on their own.
• Fixed a false "you're already on the baseline" message that could show up after a revert when you weren't.

VirusTotal: https://www.virustotal.com/gui/file/c465eb7a3bc477db48cbbfb5b70cf37e6b6799d6e69228fb84e83752ac6daa96/detection

LapSmith v0.21.0

v0.1.21 is up — two big fixes 🛠️

Closing it actually closes it now. If you'd noticed LapSmith staying open in the background after you X'd it (holding the port so you couldn't reopen without Task Manager) — that's properly fixed. Turned out a change had silently undone the earlier fix.

Detection no longer breaks when Forza loses focus. Forza stops sending telemetry the instant it's not the active window, which made car detection feel like pot luck — especially while you were alt-tabbed setting LapSmith up. It now remembers the last car it saw and just tells you it's paused, instead of forgetting your car. If you'd struggled to get detected, this is the one.

Also in this release:

• Switch cars mid-session → it asks if you want to set up for the new one
• Tyre pressure now in psi or bar (bar to 2 decimals, since the game only gives you 1)
• You now pick your tyre compound instead of it assuming Slick

Grab it from GitHub releases. Reinstall via the Setup.exe if you had the "no car detected" issue.

If you reported either of the big two — give it a go and let me know in #bug-reports

LapSmith v1.0.17

v0.1.17 — fixes "No car detected" on installed builds

If you installed LapSmith and it said "No car detected" even with Forza's Data Out set up correctly — this fixes it.

• Telemetry now reaches the installed app. It listens more broadly and the installer now adds the Windows Firewall rule it needs automatically, so a fresh install just works.
• Clearer message when no telemetry arrives. Instead of the misleading "No car detected," it now tells you it's bound and waiting but receiving nothing — and that this is usually a firewall or Data Out issue — so you're looking in the right place.

If you hit this before: please update and reinstall via the Setup.exe (that's what adds the firewall rule). If it still happens, the new message will tell you exactly what to check — let me know in #bug-reports.

Note: this installer now adds a firewall rule for the telemetry port, which can trip an extra antivirus heuristic or two on VirusTotal — that's expected for an installer that touches the firewall. Source is open if you want to check it. VirusTotal: https://www.virustotal.com/gui/file/e5993069bdfcfd5794046b6d253f71d69ca420c31e35b83d7ab29a2a4025936e/detection

LapSmith v0.1.15

v0.1.15 — sharper, telemetry-driven reasoning

It now reads more of the data Forza puts out, so it understands the car better and tells you why more clearly.

• Per-wheel detail. It now tracks each wheel individually — so instead of "rear slipping" it can tell you "rear-left spinning" or "front-left locking under braking," and confirms a locked wheel from its actual rotation.
• Better balance reads. It uses per-corner suspension travel to judge front-vs-rear and body roll when suggesting spring and ARB changes.
• Smoother-ride awareness factored into how it scores a change.

No change to what it tunes — this release makes its existing decisions better-informed and its explanations more specific. Gearing is still not tuned (the telemetry doesn't expose enough to do it well, so it's left out rather than guessed).

VirusTotal: https://www.virustotal.com/gui/file/1c06e6d8cd2cc0af74aae66dab439654ecd817cff7291f8a6c98991780232846/detection

LapSmith v0.1.13

v0.1.13 — bug fixes (please update)

Thanks to everyone who reported issues — this release fixes the big ones.

• Fixed: the app not closing properly. Hitting X left it running in the background with the telemetry port held, so you couldn't reopen it without killing it in Task Manager. It now exits cleanly and frees the port straight away.
• Fixed: sessions and logs not saving. This was tied to the above — because the app was being force-killed, sessions never got written. Logs now save continuously as you drive (in %APPDATA%\LapSmith\sessions), so a session is kept even if something goes wrong. Added a "Save current session now" button and an "Open logs folder" shortcut.
• Fixed: finishing on the baseline tune even after a faster one was found. It now always saves the best confirmed tune, and tells you which one it picked and why.
• Hardened the change-tracking so it can't ask you to revert a change you never made.

If you hit any of these before, please grab a fresh session log next time and send it over — it now captures the full step-by-step, which makes anything left much easier to fix.

LapSmith is a free, telemetry-driven tuning assistant for Forza Horizon 6. It reads the game's Data Out feed and your tyre Heat page and tells you the exact change to make next — one tweak per lap — until the car stops getting faster. You drive and type the values in yourself. It only reads telemetry and the screen; it never injects, automates input, or modifies the game.

This is the first public release. It's had a lot of my own testing but not much outside use yet, so if you hit something odd, please open an issue — that's a huge help.
Downloads

LapSmith-Setup.exe — installer with a Start-menu shortcut and uninstaller. Recommended.
LapSmith-0.1.6-portable.zip — no install; unzip anywhere and run LapSmith.exe.

First run

The app is unsigned, so the first time you run it Windows SmartScreen will say "Windows protected your PC." Click More info → Run anyway. If you use the portable zip, right-click it → Properties → Unblock before extracting.

It comes back clean on VirusTotal (0 of 66 engines):.: https://www.virustotal.com/gui/file/48de0d90491d7cbdcfd255ac847c6e23e2cae99a9d23a56f9b2e5deb4065d35e/detection

Setup

In Forza Horizon 6, turn on Settings → HUD and Gameplay → Data Out, set the IP to 127.0.0.1 and the port to 5607, and run the game borderless or fullscreen. Full quick-start is in the README.
Notes

LapSmith is free and always will be — nothing is locked behind a payment. If it saves you time and you want to chip in, there's an optional tip jar: https://ko-fi.com/ultimatekillcam

Not affiliated with or endorsed by Microsoft, Playground Games, or Turn 10. "Forza Horizon" is used only to describe what the tool works with.

LapSmith v0.1.5

What's new in v0.1.5

• The overlay can now be dragged from anywhere on it, not just the top corner.

LapSmith is a free, telemetry-driven tuning assistant for Forza Horizon 6. It reads the game's Data Out feed and your tyre Heat page and tells you the exact change to make next — one tweak per lap — until the car stops getting faster. You drive and type the values in yourself. It only reads telemetry and the screen; it never injects, automates input, or modifies the game.

This is the first public release. It's had a lot of my own testing but not much outside use yet, so if you hit something odd, please open an issue — that's a huge help.
Downloads

LapSmith-Setup.exe — installer with a Start-menu shortcut and uninstaller. Recommended.
LapSmith-0.1.3-portable.zip — no install; unzip anywhere and run LapSmith.exe.

First run

The app is unsigned, so the first time you run it Windows SmartScreen will say "Windows protected your PC." Click More info → Run anyway. If you use the portable zip, right-click it → Properties → Unblock before extracting.

It comes back clean on VirusTotal (0 of 66 engines):.: https://www.virustotal.com/gui/file/ecafbd0b36dfee852cd3ab6e716e92b9f69f3b3592fc120d26db70e327dc4679/detection

Setup

In Forza Horizon 6, turn on Settings → HUD and Gameplay → Data Out, set the IP to 127.0.0.1 and the port to 5607, and run the game borderless or fullscreen. Full quick-start is in the README.
Notes

LapSmith is free and always will be — nothing is locked behind a payment. If it saves you time and you want to chip in, there's an optional tip jar: https://ko-fi.com/ultimatekillcam

Not affiliated with or endorsed by Microsoft, Playground Games, or Turn 10. "Forza Horizon" is used only to describe what the tool works with.

LapSmith v0.1.2

What's new in v0.1.2

• Added a "Show overlay in screen recordings" option (off by default) so you can capture the overlay in clips, with a reminder to keep it clear of the Heat-page temperatures.
• Added Exit and Main-window buttons to the overlay, so you can quit or return to the main window without leaving the tuning view.

LapSmith is a free, telemetry-driven tuning assistant for Forza Horizon 6. It reads the game's Data Out feed and your tyre Heat page and tells you the exact change to make next — one tweak per lap — until the car stops getting faster. You drive and type the values in yourself. It only reads telemetry and the screen; it never injects, automates input, or modifies the game.

This is the first public release. It's had a lot of my own testing but not much outside use yet, so if you hit something odd, please open an issue — that's a huge help.
Downloads

LapSmith-Setup.exe — installer with a Start-menu shortcut and uninstaller. Recommended.
LapSmith-0.1.1-portable.zip — no install; unzip anywhere and run LapSmith.exe.

First run

The app is unsigned, so the first time you run it Windows SmartScreen will say "Windows protected your PC." Click More info → Run anyway. If you use the portable zip, right-click it → Properties → Unblock before extracting.

Heads up: one engine (Deep Instinct) flags the installer on VirusTotal. This is a known false positive for apps built with PyInstaller — the project is open source, so you're welcome to read the code or build it yourself.: https://www.virustotal.com/gui/file/10b811875070296cf1f5c7f4666cc2e20818fe55b85857acbfa67511436753e8/detection

Setup

In Forza Horizon 6, turn on Settings → HUD and Gameplay → Data Out, set the IP to 127.0.0.1 and the port to 5607, and run the game borderless or fullscreen. Full quick-start is in the README.
Notes

LapSmith is free and always will be — nothing is locked behind a payment. If it saves you time and you want to chip in, there's an optional tip jar: https://ko-fi.com/ultimatekillcam

Not affiliated with or endorsed by Microsoft, Playground Games, or Turn 10. "Forza Horizon" is used only to describe what the tool works with.

LapSmith v0.1.1

What's new in v0.1.1

• Fixed importing the Nexus "Forza Horizon 6 Car ID List" — both the JSON and the semicolon-delimited CSV now import correctly (names were previously stored as raw records).
• Fixed the setup window stretching far too wide.
• Added a selectable target class in setup (was auto-only).

LapSmith is a free, telemetry-driven tuning assistant for Forza Horizon 6. It reads the game's Data Out feed and your tyre Heat page and tells you the exact change to make next — one tweak per lap — until the car stops getting faster. You drive and type the values in yourself. It only reads telemetry and the screen; it never injects, automates input, or modifies the game.

This is the first public release. It's had a lot of my own testing but not much outside use yet, so if you hit something odd, please open an issue — that's a huge help.
Downloads

LapSmith-Setup.exe — installer with a Start-menu shortcut and uninstaller. Recommended.
LapSmith-0.1.1-portable.zip — no install; unzip anywhere and run LapSmith.exe.

First run

The app is unsigned, so the first time you run it Windows SmartScreen will say "Windows protected your PC." Click More info → Run anyway. If you use the portable zip, right-click it → Properties → Unblock before extracting.

It comes back clean on VirusTotal (0 of 68 engines): https://www.virustotal.com/gui/file/10b811875070296cf1f5c7f4666cc2e20818fe55b85857acbfa67511436753e8/detection

Setup

In Forza Horizon 6, turn on Settings → HUD and Gameplay → Data Out, set the IP to 127.0.0.1 and the port to 5607, and run the game borderless or fullscreen. Full quick-start is in the README.
Notes

LapSmith is free and always will be — nothing is locked behind a payment. If it saves you time and you want to chip in, there's an optional tip jar: https://ko-fi.com/ultimatekillcam

Not affiliated with or endorsed by Microsoft, Playground Games, or Turn 10. "Forza Horizon" is used only to describe what the tool works with.

LapSmith v0.1.0

LapSmith is a free, telemetry-driven tuning assistant for Forza Horizon 6. It reads the game's Data Out feed and your tyre Heat page and tells you the exact change to make next — one tweak per lap — until the car stops getting faster. You drive and type the values in yourself. It only reads telemetry and the screen; it never injects, automates input, or modifies the game.

This is the first public release. It's had a lot of my own testing but not much outside use yet, so if you hit something odd, please open an issue — that's a huge help.

Downloads

• LapSmith-Setup.exe — installer with a Start-menu shortcut and uninstaller. Recommended.
• LapSmith-0.1.0-portable.zip — no install; unzip anywhere and run LapSmith.exe.

First run

The app is unsigned, so the first time you run it Windows SmartScreen will say "Windows protected your PC." Click More info → Run anyway. If you use the portable zip, right-click it → Properties → Unblock before extracting.

It comes back clean on VirusTotal (0 of 68 engines): https://www.virustotal.com/gui/file/d20f7935b72274e67a17c78e981c4cf2d657c24d6dfe2ba8cc45d2e24f04afd7/detection

Setup

In Forza Horizon 6, turn on Settings → HUD and Gameplay → Data Out, set the IP to 127.0.0.1 and the port to 5607, and run the game borderless or fullscreen. Full quick-start is in the README.

Notes

LapSmith is free and always will be — nothing is locked behind a payment. If it saves you time and you want to chip in, there's an optional tip jar: https://ko-fi.com/ultimatekillcam

Not affiliated with or endorsed by Microsoft, Playground Games, or Turn 10. "Forza Horizon" is used only to describe what the tool works with.