weird noise

I just got my speed3 about two weeks ago and it is making a weird tapping noise can’t tell if it’s rod knock or the timing chain at first i thought it was the timing chain but now it sounds like it might actually be rod knock the car just hit 97k miles so i was assuming the timing chain because...

NOTE: I have transferred this thread which was created by me on another forum in hopes of helping someone else! Hello fellow MSO'ers, So I've been having a hard time with this weird hum noise under boosted acceleration on my '07 speed 3. I've got some mods done to it, but I have no idea what...