Long story short: I started building this app because of the FA24 oil pressure drop. I wanted to actually catch the drops when they happen, see where on track they're occurring, stop guessing, and mainly be able to do easy post-session checks.
So I started building Lap86. A track-day app for the GR86/BRZ that does the lap timing and GPS telemetry you'd expect, but built around three things I could not find on any existing app for our chassis.
What It Does
1. Live oil pressure monitoring with in-session alerts. The oil pressure sits on the LiveTimer while you're driving, and the app pings you the moment a drop occurs — so you actually know it happened, instead of finding out three days later when you scroll through a log.
2. Post-session drop forensics. After the session you get a clean view of every drop: where on track it happened (corner / track position), how long it lasted, how deep it went.
3. No threshold to set. This is the clever part. You don't tell the app “warn me below 40 psi” or whatever — it figures out the nominal pressure for your engine, in this session, at the RPM you're running, and flags real drops from baseline. So you catch the actual events, not noise, and you don't have to fiddle with settings every time conditions change.
Bonus: live tyre pressures (all four corners) on the LiveTimer, with graphics, using the stock TPMS.
As far as I know, no other app on the market does the adaptive drop detection.
Live Timer in Action
LiveTimer with oil pressure drop warnings and tyre pressure readings. The oil pressure thresholds in this clip are set intentionally super sensitive to demonstrate the warnings.
Post-Stint Analysis
After the session: every drop on a map, with corner location, duration, and depth.
What You'll Need
For lap timing only (works on iOS and Android): a RaceBox (any model — Mini, Mini S, Micro) or a Qstarz BL-818GT GPS.
For the oil pressure features — the whole reason this exists:
- An Android phone (iOS support for vehicle data is on the roadmap but not ready)
- An OBDLink MX+ Bluetooth adapter
- An Ansix Auto CANBus adapter (I plan to support the GJP kit as well)
If you have a different setup, mention it and I'll see what I can do.
The Beta
- Android-only build during the closed beta (iOS TestFlight comes later)
- I'll send you an APK install link directly
- Looking for ~5–10 people for the first round
- Want feedback on everything — alert accuracy (false positives / missed events), UX, bugs, feature requests
One ask before you sign up: what tracks do you run? I need to add tracks to the app (custom track creation is planned for the future).
iOS users — you're welcome to test it, just know that for this round the pressure / vehicle data piece is Android-only until I sort out an iOS-compatible adapter.
Get In Touch
It's a personal / hobby project. If anyone is interested I can share code etc. The original thread with discussion is on gr86.org — drop a reply there or reach out through the About page.
Thanks for reading.