Got this reply from a tuner about egts from tuning. Opinions needed.

[the evil twin]

Thanks ET. The reason I changed the scangauge from MAP to boost was because most people use this when posting on forums so it was easier to follow what was going on. I will change it back to MAP.

What MAP psi should I be looking at?
- Cruising at 100kph - 27?
- Foot to the floor? (35-40?)

Depends on the vehicle, Dawes or ECU, VNT tweaked or factory, load, etc
I would SWAG it as 30 ish MAP flat wack and 25 ish at 100