Catch Can To Sump

[GT-RZ]

Anyone got any experiences with plumbing a catch can back in to the sump? is it a good idea?

my sump is a 7l one with wings and along with plumbing an external oil return from the head in to the rear of the sump wing i thought i could use a Y piece and connect a return from an oil catch can i'm making to sit above the cam covers?

Not going to bother venting to atmo and iv never liked the idea of putting it back in to the intake...

ideas!!

[Cjmartz2k]

Search. This has been discussed already, but bottom line, you don't want the oil/gas/carbon blow bye mixture going back into your oil, do you? What are you even gaining other than a cap full of oil back into your sump? Just check your oil and add as needed.

[Risking]

Anyone got any experiences with plumbing a catch can back in to the sump? is it a good idea?

my sump is a 7l one with wings and along with plumbing an external oil return from the head in to the rear of the sump wing i thought i could use a Y piece and connect a return from an oil catch can i'm making to sit above the cam covers?

Not going to bother venting to atmo and iv never liked the idea of putting it back in to the intake...

ideas!!

you have to either vent it to atmosphere or the intake.

Venting it to the sump wont prevent the crank case pressurising

[R33S2]

according to my tuner its not so much the oil (depending on blowby) but the hot air going into the intake that makes it bad, I have been toying with the idea of using my old side mount intercooler (or a cutdown one) as a catch can, plumbed back to the plenum, any bad side to this idea?

[Adriano]

Most of the catch cans that go above the cam covers automatically drain back to the sump through the breathers. Its defiantely the oil mist that increases detaonation, not the heat of the blowby, but a good catchcan gets rid of the oil out of the blowby.