have the issue of my hks sounds soo high pitched when i go past 15psi
very weird noise almost like bov noise+quick surge noise (i dont hear flutter thou)... turbo seems to boost about the same. no smoke out the back of the car.. checked vaccum lines seems to be connected correctly







i dont have the stupid piece in the hks that makes it a bird noise fyi lol

 

Lol purple one make the high pitch. Something I thought I was the diaphr part of it. Chec it out

 

yaa i hate the the purple one lol

 

where did you get the BOV? If for some reason it's not a real hKS it could explain your problem

 

i had the bov on for 8 months never had a issue before..i oh lord i cant remember which site, i memeber making sure it was the real one thou

 

ok well then you've got me but that would be my best guess

 

k so this is what my car noise is --- Toyota Supra: Amuse GT30 Single Turbo Sound Demo (Exhaust & Wastegate chatter) - YouTube go to 0:32 the internal wastegate chatter

 

That choking squirrel chattery sound is air being forced back. Bov isn't opening properly.

I love my synchronic from Synapse. Everyone should have one of these things.

Can sorta hear it here...

https://www.youtube.com/watch?v=MFqq...e_gdata_player

 

I don't really like the idea of using a BOV on a car that comes stock with a BPV. I mean sure, you can make it work jsut fine, but I feel like the car doesn't drive as smoothly with a BOV as opposed to the BPV. Forge BPV ftw

 

lol well im fully built and big turbo sooo forge isnt a option lol

 

Niether of us are on stock turbo.

 

sooo i guess in this case --- forged bpv ftl lol

 

350bhp Focus Wastegate chatter - YouTube this what my bov sounds like now