Boost Controller/BO Valve/Hobbs Switch Same Vacuum Port?
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Boost Controller/BO Valve/Hobbs Switch Same Vacuum Port? On my LT4, the installer did a terrible job with pretty much everything, including how screwy they routed the various vacuum lines to the intake. I'm trying to clean this up, but of course there aren't nearly enough vacuum ports on the intake. I was thinking since the Turbosmart boost controller, Hobbs switch (for the dual fuel pumps) and the BO valve are all just trying to read boost pressure, I could route all of those to a 3-way T off the same vacuum port. Is there any issue with doing this?
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From: Norn Iron
In theory yes...in practise not always.
And where possible do not share lines for vital items like map sensor, FPR etc.
Ultimately as long as none ever leak then it should be ok though and take any important signals fro a central plenum for a better smooth signal.
And where possible do not share lines for vital items like map sensor, FPR etc.
Ultimately as long as none ever leak then it should be ok though and take any important signals fro a central plenum for a better smooth signal.
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From: Rancho Cucamonga, CA
The issue becomes there just aren't enough ports, and I don't like having them share with other stuff. The other ports used are one for the HVAC controls, one for the FPR, and then another I T'd going to the optispark vent tube and a vacuum line going to the transmission. ALso at the front of the intake the return line from the catch can. Would you suggest I combine them differently?
Last edited by Snorkelface; Feb 27, 2018 at 11:44 AM.
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Holee sheet, I had never even heard of that before. Just like a USB hub! Haha That's the ticket, thank you!
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Quick question; is there really any advantage to using a vacuum manifold over just T-the lines together before attaching them to the intake? I ask just because I already have the T's in place and I would mostly just moving the lines around to group them together better.