I started a project some time ago with the following features.

1. Battery voltage monitoring
2. 4 EGT thermocouple channels
3. 4 CHT thermocouple channels
4. Electric water pump current monitoring
5. Water temp
6. Oil temp
7. Charge Air temp
8. O2 sensor via serial port
9. Manifold pressure
10. Barometric sensor
11. Tachometers
12. Log data to a compact flash card
13. Graphic LCD output via serial port (Text and bar graphs)

Software is 80-90% complete but written in Proton syntax. Would be a relatively simple port to PICBasic.

Circuit board is complete.

Project was designed for an aircraft application, but the project went away.

PM me. We'll talk.