Oil in intake manifold

[baconcootie]

Need advice! I put a 2 lb. lower pulley on my ported Eaton keeping my 2.76 upper pulley. I started seeing oil in the air intake so I put breather filters on both valve covers. I sealed both PVC tubes. After a day at the drag strip, I started seeing smoke on start-up and oil dripping from an exhaust manifold. I removed the supercharger and found at least a pint of oil in the intake manifold. Mr. Google seems to think that the PVC system is still the problem, but I fear that it is something more serious. Is the next step removing the heads? The engine is currently out of the car.
TIA

 

[Wayneo]

If you deleted the PCV system that can’t be the problem. I would have done a compression test before taking the engine out but since you did I would do a cylinder leak down test to try and isolate the problem before tearing it down and hoping you find the problem.

Did you get a new tune after putting the 2lb lower on? You may have melted a couple pistons if not.

 

[SVTDice]

I would start with a compression test and a leak down test anything between a 5% variance. Should not be alarming. 10% normally the general average that is considered acceptable. Make sure you do a dry test and a wet test and pin the throttlebody open when you do a compression test. Let me know if you have any other questions.