here is a free mod that you can do to your standard skyline bov which will improve your throttle response..
if it has been posted before, then too bad..
I have found a mod that can be done to the standard skyline bovs to make the car a little more responsive without any side effects.
What you will feel is that the boost will come on quicker and the bov will not release till a little later.
meaning that you won't have that constant re-circulating sound you get with the standard bov.. (this sound is heard more if you have a pod filter..)
here is what you do..
take the standard bov off.
look at the bottom of it..
you will see the piston on the hole, then a small hole next to it.
you will need to find a small screw that will fit the hole.
the screw needs to have a FLAT head so that it doesn't protrude too much above the bov plate.
What I did was found a flat screw which fit in the hole easy, then I wrapped it in that plumbers tape (the white stuff) until it was fat enough that it had to be screwed in.
once in, I used some super glue on top to make sure that it is completely on there..
let it dry, put the bov back on and go for a spin..
You should be able to feel the difference..
no more KW's but I think that it comes on boost a lot quicker and doesn't release so early like a standard one does.
if you have any questions or want help doing it, then let me know.
the pics below are not mine but it shows what I am talking about..