[Flick]

A couple thoughts. It takes fuel to energize the turbo to produce boost on the 2-stroke engines, so based upon your boost numbers I would conclude your fuel supply is more than adequate.

Gauges and senders can go funky with time. If the digi-panel is hooked to the same sender as the analog gauge then all you need to do is determine which gauge is dependable and an IR gun can help with that.

Since your fan is direct drive your air through the radiator is dependent on engine RPM. At 15psi boost and 1600 you may not have enough airflow to keep up, but verify your gauge accuracy first. Keeping a 2-stroke rev'd and cool is all you have to worry about.

ok so then on flat land 1700 rpm at 65 running gauge temp 185 and digi 175. On hills gear down to keep rom close to 2000 and temp below 200?  Should I trust that temp light if it comes on?