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Boost reference FPR - vacuum line routing?

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Old Dec 12, 2018 | 02:32 PM
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Default Boost reference FPR - vacuum line routing?

Probably should have posted this in the newb section but here it goes....

I have a Aeromotive boost ref FPR and built a return style fuel system which leverages stock rails and truck mani from a 2004 LS. Plans are to install a windmill by the end of the winter but for now I'm interested in getting some of the basics covered.

Question is where do I plumb the vacuum line for the FPR? I think it's to the pass side of the truck mani right? I'm pretty sure I saw a sloppy vid where he cut off the end of a capped port and plumbed a MAP to it but I'm using the stock location for a 2 bar map and was thinking I could run the FPR and a gauge from that location. Just thought I'd check here before I did.
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Old Dec 12, 2018 | 02:34 PM
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I would say that any port that "sees" manifold vacuum/pressure would be fine for that.
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Old Dec 12, 2018 | 03:00 PM
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Originally Posted by G Atsma
I would say that any port that "sees" manifold vacuum/pressure would be fine for that.

Here is my problem...... I'm a total newb at Fuel Inj, Forced Ind, and LS in general so I think the capped port on the pass side of the intake mani sees vacuum but I honestly don't know. I guess if there is a better spot I'll take that too!

The more I thought about it I have more vac lines needed as well like say the WG for example!
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Old Dec 12, 2018 | 03:35 PM
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No matter what the engine, injected or carbureted, natural aspiration or under pressure, manifold vacuum/pressure is what it is. Tap into a source of either/both and you have it!

Last edited by G Atsma; Dec 12, 2018 at 04:47 PM.
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Old Dec 12, 2018 | 04:29 PM
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Any vacuum port on the intake after the throttle body.

Andrew
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Old Dec 14, 2018 | 02:58 PM
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Originally Posted by epfatboy
Here is my problem...... I'm a total newb at Fuel Inj, Forced Ind, and LS in general so I think the capped port on the pass side of the intake mani sees vacuum but I honestly don't know. I guess if there is a better spot I'll take that too!

The more I thought about it I have more vac lines needed as well like say the WG for example!
the pass side behind throttle body will work. any port behind the throttle body should work fine.
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