The V gauge in the car never drops below 14V while driving and under full boost.

14.2V at the battery at idle.

13.2V at fuel pump at full boost 4000rpm in 4th.

Voltages look OK so I presume the alternator is fine.

It sounds like possibly metal tapping or a ticking noise, only when warm, not at cold?!?

Maybe something has come loose in the head............

Losing a few screws myself lately haha