I finished my setup a few weeks ago and the car has run great. Recently i've noticed that when i smash the gas and boost climbs to 9psi. The wastegate makes a VERY weird noise. The best way i can explain it is that it kinda sounds like if your squeezing out air from a balloon really slowly. Could this noise be happening cause i don't have a dumptube?

 

yup

 

Thank you !.