Can anyone tell if this port for the PCV system at the bottom of the intake manifold see boost?



Bob

 

I believe it is a one way check valve. Positive pressure in the manafold closes it.

 

There is no valve there. It is just a fitting. Under boost it pushes pressure threw that to the PCV valve, and pressure into the valve cover due to the free flowing(both ways) OEM PCV valve. When you let off the gas(got to a vacuum condition) the pressure exits the valve cover with oil vapor suspended in it. This then gets sucked into the upper plumn and threw the blower. But switch out the PCV valve to a "check valve" you stop the pressure from going into the valve cover, but still allow pressure to come out of the valve cover. And by putting a dime in the upper plumn boot you stop the flow of oily vapor threw the blower and intercooler.

On mine I put a vacuum cap on the upper plumn, switched the PCV out, and connected the line coming from the PCV straight to the one in the lower manifold(did away with the "T" and the upper part of the lines)



Bob; I tried callin you are at work. They said you were gone for a hour lunch or something like that Call me back wherever you are hiding.

 

Yes, I believe it does. Isn't that the port that is 'T'd" into the PCV tube that runs from the PCV to the upper intake? If(and I believe it is.) that is correct, it see's boost.

Dan