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Multi vacuum lines

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Sam's GSX

5+ Year Contributor
394
54
Jun 10, 2018
Hohenwald, Tennessee
Quick question, can I have 3 tee's tapped off the fpr vacuum line?
I've had my mechanical boost gauge off of it for over a year now and had no problems, but now I have aem tru boost and a meth kit that both need vac sources, will it mess my afpr up? Or it won't make much of a difference? Also if it won't work, can I tee off of the emission lines by the throttle body?
Thanks
 
You can run a simple boost gauge on the same source as the afpr, but the true boost has a map sensor correct? If so, you'll want a dedicated source and not too long. IDK on the meth kit. I recommend reading the instructions.
 
Just picked up the instructions for the first time ever, but it just says manifold pressure, so I will tee the meth to the fpr, as for the tru boost, I've been using a straight source but its before the throttle body and it reads quite a bit different at cruise (I know it wont read vac, but if rather it read 0 till I actually get into boost) oh well
 
Ideally, you want the MAP to have it's own short line to the manifold. I would not use a source before the throttle body. Only use it on the manifold and to a lesser extent the throttle body.
 
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