420A Vacuum lines

[Kyle McL]

Ok, let start of that I have searched the forum and found stuff for these questions, somewhat? I have a Turbo 420A. The previous owner installed the turbo. I had a good friend look at the engine right after I got it noticing it acts slightly funny. Among a few other things irrelevant to this topic. He said that the vacuum lines are not run right or so. More specific, he said that the Blow off valve and external wastegate(believe, needs replace) should not be sharing the same vacuum. YES I have a few different diagrams of how the vacuum lines are run, printed out. I look at these and all of them to seem slightly differ or me just not reading them right. I am not a mechanical genius but am willing to learn and take my time to do things right. So the questions. Should the wastegate and blow off valve be sharing the same vacuum line? If not, how should it run? Is their is a more simple diagram that could show me how to run my vacuum lines?

P.S. I was waiting more to post this in the 420A Turbo conversion forum but am still a probationar memeber and really am looking for the answer to this.

 

[synthetek]

They should not be run off the same line. The bov vacuum line should be connected to a vacuum source on the intake manifold. The wastegate operates off of positive pressure (boost) not vacuum. The wastegate line should be connected to the compressor cover of the turbo or to a lower intercooler pipe close to the compressor outlet.

 

[Kyle McL]

Should their be a mounting point already set up on either of them where I can connect it or should I have to make a self tap? If I need to do it myself, any advice on how to do it?

 

[synthetek]

Should their be a mounting point already set up on either of them where I can connect it or should I have to make a self tap?

It depends on what type of turbo / intercooler pipes you have. some have the nipple on the compressor housing, some don't. You need to check the turbo and IC pipes it may be there but capped off.

 

[Kyle McL]

I looked on the compressor housing of the turbo and intercooler pipes and their is not one. Is their another place I can run it. Like the boost line on the BOV? I have the boost gauge connected to that right now but could put a T on it and run it to both. If that would work. I looked a little online for pieces of intercooler piping that has a line already on it and I am not sure exactly what to be looking for their.