cr80442 So I have the factory blow off valve which I want to run to the atmosphere before you tell me to recirc I don't have the return fitting on the inlet hose to the turbo. As you can see in the photos I've labelled which ports im using for air in and air out like a standard single port atmospheric blow off valve. The factory BOV used the standard piston BOV layout. I'll install it on the car on the hot side intercooler hose where it would normally be. I noticed from the factory that it's in reverse and I have no idea how the piston opens. Any ideas?
Vee_Que So that open end you have shown in the car is the "in"? You can go to an aftermarket unit and one of the intake pipings allows for bov breathing. But the later cars had the cbv on the turbo itself so it's hacking up the piping to make it work m