engine noise...help please

[imblown-ru]

i was on the highway tonight playing around with my buddy's 240 and at about 4k + im hearing a sliiiight ticking noise coming from somewhere in/around the motor. is this knock or detonation? or what could it be? im imagining its happeneing around when full boost happens? help please. thanks guys

 

[tomustang]

is it a tick or a clank/knocking sound?

 

[imblown-ru]

its a light tick noise. couldnt hear it if i had the radio on...only at wot

 

[imblown-ru]

anyother opinions? im thinking it might just be the gas or something a little off...its never happened before?