Post the pictures and you will get the answer you are looking for. Without the pictures you cant get much help but a good guess.

 

pics would give you the best response

 

Does it sound like this

WAAAAAAPishhhh chhhhiksshh chhhhiksshh

if so that is compressor surge, The quick and first loud noise you hear will be your BOV. anything after that will be the surge in your turbo

 

Pics simple or stfu

 

my tial sounds like a heyena laughing but everyone on here noes what a tial sounds like ha

 

that is the stocker, your intake will most definatly be louder since its the HKS and has very low resistance for better performance.

now that weve established that what is the problem your having, describe it accurately as possible and what your doing when it happens, ill subscribe n see if i cant help more

 

so wheres th epics????

 

It happens on partial throttle shifts (or lifts). With full throttle it sounds closer to a normal b.o.v. To me it sounds as if the pressure is released in short intervals. The volume(decibel) slowly decreases. The rhythm is very similar to a bouncing ball coming to a stop, if that helps.

I never posted pictures because from other pictures it looked like my valve was installed right. Also, other mentioned that it is a common sound for cars with diverters and open intakes. If i have some time I'll try to post some pics.

 

post a pic