[Kodename47]

Originally Posted by x808drifter

If you can only have 3 gauges...
Boost/AFR Like you have.
Oil temp/Press
EGT

On top of that I'd personally have water temp.
One with actual numbers, but there are other options like an OBD2 reader.

Fuel Press is nice but imo unneeded.
Maybe if you track it and are seeing enough side G to cause fuel starvation.

Gauges to help tune.
Boost
AFR
Fuel Press
EGT

Gauges to make sure the car is running ok while driving.
Boost
AFR
EGT
Oil Temp/Press
Water Temp.

Edit: If tuned properly with that boost/AFR gauge the ecu should pull boost and possibly even be able to put the car into limp mode if the car starts going lean from fuel starvation.

All of this ^^^