VXOC Astra-J/GTC

ive got a clicking noise when i hit the throttle pedal and the turbo kicks in.the clicking noise is for a second or two.
some times i hear it some times not.it happens when i accelerate hard and it seems to be coming from the engine bay or underneath that area.cars fine otherwise.
anybody got any ideas what it could be.

When you accelerate hard the engine "twists"/moves in its mounting points.
Maybe yours are getting worn out causing the engine to move a tad too much and causing some part somewhere to make that noise only when you hit it hard.

That's the route I'm thinking of. But i'm gonna let the more experienced forumers handle the rest because I don't know enough about this Could be something entirely else