Something is wrong with our turbo. The timing of it is scaring me, as we just upgraded to the hot juice and put it back on two days ago. Yesterday, I noticed a new sound, it is in cadence with the turbo, and at low boost, say 2-6 psi, it sounds like a faint fire truck siren would be the best way to describe it. We did try the turbo on stage 5 the day we reinstalled it, and it did surge briefly, but this is probably because the pump can't supply enough fuel, but now that noise is there. It does get drowned out at higher psi's, and I talked to guy who recommended to take off the intake, grab the nut on the turbo, and check for wiggling forward and backward in particular. There was none, so if any of you guys have any other recommendations I am open to them, but now I'm just hopin it can be taken care of.