Ok so don't shoot me down!
I have a standard Subaru recirc valve on my car but it's broken, so I've got another one coming.
In the meantime I've fitted an aftermarket one that's either a Collins or Forge Re-Circ valve!

My question is when I'm at low boost like under 3.5k it dumps VTA
But over 3.5k it make no noise and recircs (I like this )
Also when it does dump VTA it makes a combined chatter noise aswell!

Why is it making a VTA noise if it's a recirc is it because it's low boost?
And why does it chatter as well?

Just a query really as I'm going back to standard a.s.a.p

Thanks

 

are you running a pod filter?

 

Standard airbox and filter...cars a 2001 UK300