Thread: Confused with oil separator system

true but if he was to run that line from the VC into the intake instead of the IC pipe he should be all right then, correct?

Correct!

This is what I was trying to say in my first post. You want a system that will relieve crankcase pressure, allowing the air inside the motor to remain uncompressed, and preventing oil from entering your intake.

Pretty much no matter what, you are going to have a problem on a blow thru setup. It isn't that bad though, here's why.

Metered air in the form of blow by gas is put back before the maf (into the intake before the turbo) and read again by the maf after the intercooler. This will cause a negligible change in AFR, because this air is normally blow by anyway. When at idle the VC is put under a vacuum by the pcv valve and it will suck in unmetered air from the intake pipe. Remember the intake pipe is placed before the maf right? This can cause a lean running idle (like what I have right now with just a breather on the vc). I can take the breather off and literally watch my afr drop from 17:1 to 15:1 just by plugging the hole the breather filter is on.

The ideal would be to place a one way valve that will flow lots of air in the hose that goes back to the intake. This will prevent the vc from sucking in air at idle, therefore, maintaining a perfect afr at idle as well.

^Coheed the PVC valve shouldn't be sucking any air in from the intake it is a one way valve unless it needs replaced.

Yup I put some clear vinyl hose on to make sure. There is really quite a bit oil trying to get out



The stock can just has two baffle plates.( I cut mine open to see )

So from what I understand, this is the best idea so far?Or should the OEM catch can remain in place aswell?


And just to make everything clear, this is on a blow-thru setup.(MAF after turbo)

It would be better to have some kind of draw or vacuum where the breather side is. Also you will have to drain the watery oil that greddy can will fill up with and add oil to replace it

Good point, I didn't think about the turbo shoving the air and it trying to escape out of any hole possible...



Ohhh gotcha, that makes sense too now. I think I now understand why OEM setup has the VC breather going back to the intake too, this way the pressure will get sucked in with air going to the intake mani.

Now an idle FPR of 17:1 is not too bad right? Would actually give you better mpg's probably



Oh hmm, good idea on the clear hose, as long as it doesn't melt away haha.





I think your better off just using the stock Oil separator, that way it just drains back to the crankcase, as Jere says it

So then return to the stock setup?