I bought a used kit and was wondering , what is the small barbed fitting coming off the outlet flange for? tried a search and could find nothing about this. Thanks

 

Are you talking about the oil return barb fitting? it's on the bottom of the turbo housing

 

Nope. I know what the oil return is. It is like a little vaccum barb fitting a little bigger than the vac line for the boost gauge. It is located right on the outlet flange atatched to the outer wheel of the turbo.

 

post a picture of it please

 

I'll try to get some up soon. My camera needs batteries. Thanks for the help

 

 

I have no idea what that is. weird

 

did someone use that for a boost gauge or something???

I am lost since that is coming off the top of the turbo....

 

its used for an external wastegate

 

How?

 

Yeah how? I would have thought it made more sense for a boost gauge. Maybe i'm dumb , but how can a gauge read boost psi from vacum?

 

the outlet nipple is the 1st place that will be charged to 5-6psi and you run a line from there to your external wastegate. also for a boost guage you have to use a source that is from the trottle body or the intake manifold. because you need somewhere that will show boost and Vaccume

 

Unless i have greatly misread , everybody is running a line from the throttle body or the back of the valve cover to the wastegate. Which is correct?

 

trottle body, is what ive seen but the barb is for a wastegate just to tell you.

 

I thought the wastegate needed vacum.

 

no it does not, when the wastegate reaches the amount of PSI your spring is then the wastegate will open it doesnt have anything to do with vaccum

 

Not saying your wrong , because obviously i don't have a clue , but why do most people T into the line coming from the back of the valve cover or throttle body. Wouldn't this fitting be the best place then? Which is best? Thanks for helping out.

 

i think we need some pictures of peoples set up's for the wastegate and vac lines to give us some clear pics of what to run where

 

I prefer t'ing off of the IM for the VAC source for the WG because it takes into account I/C drag and other parasitic losses in the system. As for this fitting, take out the nipple and cap it off.

 

my system is set up that way with the vacumm line running from the turbo to the wastegate. theres pics that oyu can see how its hooked up on the third page of this thread. https://www.scionlife.com/forums/vie...+kit&&start=20