Structure240sx wrote:why? i have my fmu, wastegate, bov, boost gauge all sourced off the fuel pressure regulator vaccuum line and have no problems with anything. wastegate opens at 8psi like it should, bov opens when i shift in boost like it should, fmu adds fuel in boos tlike it should (would have blown my motor by now if it didnt and my egs would be a lot higher)
Since the FPR line is after the TB I don't see any issues with having everything but the wastegate using that line. I'm sure you won't see any issues either with the wastegate... but theoretically, for example, the wastegate would close during hard deceleration since the TB is closed causing a boost spike (?) or just sending more air out the BOV (hey that could increase sound

).
Anyway I just went along with what the Tial instructions said. I'm kinda overjealous with my car. I have a steel braided line going directly from the compressor housing to the wastegate side port to make sure the wastegate always sees a signal... for example I wouldn't want my line to melt

causing sever boost spike then BOOM.