Originally posted by busky2k
So how does it feel after you've done the mod? Holds boost better?
There is nothing that I can feel that is different. Except that the BOV now holds a rock solid 20psi. I am sure that it will hold more but my boost gauge only reads to 20psi.
Crushing the top would probably work too. But eventualy you will run into the same problem at higher boost. From what I can see (I cut open another stock BOV) The more boost you run the tighter the BOV will close with this mod.
There is a diaphram inside the BOV before this mod the pasage that you block allows boost to be equal on both sides of the diaphram and relies on the spring to hold it closed. After the mod you have boost and the spring pushing the BOV closed with atmosphere trying to push the valve open so the more boost you run the tighter the valve closes.
Hope that makes some sense.