Quote:
Originally Posted by bdubnyc
About the lines on the Throttle body: (copied from another thread)
The vacuum lines are simple: 3 lines start at the throttle body.
The bottom one goes to the canister, block it off unless you are using the canister.
The larger one on top runs to the bypass valve (BOV), there should be no tee's or branches - go directly to the BOV.
The smaller top line splits to the fuel pressure regulator, and runs across the front of the engine to your boost gauge and/or the boost pressure port on your boost controller.
The wastegate gets its signal from the nipple on the intercooler piping.
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I will recommend against this. Reason being, considering how vital the FPR is, having a potential failure within the vacuum line system due to new components (as now you have also introduced a boost gauge as well as several other ancillaries) is much too great of a risk to partake!
FPR should have it's own dedicated source from the TB. You are MUCH better off t-ing into the BOV than the FPR. I can live with the BOV not working or having an issue. a FPR having an issue can lead to a completely toasted engine!
The bottom port is what I used for the FPR.