Recirculating my crankcase pressure back to my inlet pipe? new oil catch can set up.

nig3

Member
Here is a diagram of how i installed my oil catch can, i kinda modified it differently than the traditional way not only is there a check valve by the IM on the hose connecting the IM to the OCC i also added an extra T fitting and check valve hose running back into my inlet pipe. And then on the other hose that normally just connects the crank case pcv to the OCC, i added another T fitting and hose and connected it to the valve cover pcv so that both the crank case pcv and VC pcv run threw the OCC before being sucked back into the IM or inlet pipe. The system is working flawlessly like i planned but im still wondering if rather than letting the inlet pipe draw in the positive pressure during boost, what if i disconnected the hose running up to the inlet pipe and just added a simple breather to vent off all the blow by during boost and then just cap off the left over hole in the inlet pipe, this way only fresh air will enter the motor under boost. But im also worried that by letting the crank case pressure just vent off during boost, am i venting off air that has already been metered by the MAFS possibly screwing with my afrs???? any advice on this subject will be greatly appreciated.


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I read leaving recirculating the way i have it now as compared to the possible breather set up, leaving that hose connected to the inlet pipe durring WOT has the benifit of a slight vacuum created inside the turbo inlet pipe from the turbo pumping so hard that it will actually pull the crank case pressure out rather than just relying on the positive Crank case pressure venting out on its own. But still the way i have it now is fine and dandy but even though that blow by passes threw the catch can, even after being filtered through the internal baffle and the liquid oil bits removed from the vapor before running back to the intake manifold, That air even after running threw the OCC is still a contaminated air with not much oxygen left. so know im torn between the benefits of the crank case pressure actually being sucked out faster, or have slightly cleaner air in my engine at all times but the blow by pressure will just vent threw the check valve and breather filter, possibly losing a small amount of metered air from the mafs??!!?? what to do? what to do???
 

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