Did my new turbo take a dump?

[Rawze]

When an engine is at idle, it draws in a certain amount of air. Ideally, the turbo needs to spin fast enough to keep up with it, and be ahead of it, so that there is always a slightly positive pressure at the intake instead of a vacuum. If it is not spinning fast enough,.. you get a slight vacuum at the face of the turbo, and it will make for turbo slobber.

He did his own custom tuning and it is most likely that the turbo was is not programmed to spin quite fast enough to keep up with the air requirement. What you end up with is a light vacuum at turbo and it makes it very easy to leak oil.

It is easily enough corrected by setting its programming so that there is slight positive pressure all the time.