I have a '92na with 1.6l. I'm currently piecing together the pieces for a DIY turbo. I like the idea of having a vacuum manifold for a central location for everything for the turbo system. I understand the value of keeping pcv system isolated from boost and now need an opinion or experienced advice on my vacuum source for certain turbo system components.
My vacuum/boost effect pieces on my turbo setup will include boost gauge, tein external wastegate, vortech fmu, and recirc. valve. I would like to tie all of these components into a vacuum manifold that is tied into one source on the engine. The source I have in question is an unused vacuum nipple that is located after the throttle butterfly/TB on the top of the intake manifold. It can be seen in the picture on the bottom of this page. This guy has his used, but mine is empty. Its the one on the top.
My question is how will the various vacuum boost components of my turbo be affected by this location? Will this location see vacuum and boost or just boost all of the time?
My wastegate instructions say to get a vacuum source before the throttle butterfly.....is this so the wastegate sees boost and vacuum? If the wastegate only sees boost what will happen? If the wastegate sees boost and vacuum, what will happen?
I believe that the vortech fmu will not be negativley affected from seeing boost and vacuum, but will it be negatively affected from only seeing boost?
Am I wrong in thinking that the recirc/bov will not be negatively affected by seeing boost and vacuum?