Smoke between shifts

[Shane@DBPerformance]

Could be crank case pressure, do you have any breathers or PCVs that pull vacuum on the engine? Too much crank case pressure while boosting at decent RPMs can cause the exhaust to suck oil past the turbo seal ring as soon as you close the throttle.

[LaunchHard]

Originally Posted by Shane@DBPerformance

Could be crank case pressure, do you have any breathers or PCVs that pull vacuum on the engine? Too much crank case pressure while boosting at decent RPMs can cause the exhaust to suck oil past the turbo seal ring as soon as you close the throttle.

I dont know what you mean by pcv's pulling vacuum. How does that happen?