Can anyone explain to me why i would need an oil catch can or its benifits for a s4 autox/drift/daily driven car

 

you only need one if you're boosting over 12PSI. if stock, not nessecary.

 

im in an n/a at that
someone jus told me i might need to look into one

 

Or if you removed the emissions/vac rack/pcv system and need another way to remove condensation since the stock parts are no longer there.

That's what I had to do because I was getting condensation after ripping all that stuff out. After the catch can it was dry as a bone.

 

Oh right on.

forgot to add: be sure to clean it out also.

 

You don't need one. No benefit. Just leave the stock purge system in tact.

 

i have my stock pvc system installed and i have moisture and awhite film in the oil filler neck what does this mean?

 

it means your ventilation is insufficient or the PCV system is not hooked up correctly.

 

i have no emissions , no pcv. can i install a line from a plug on filler neck to a vac plug?

 

how bad is it leaving the 2 plugs on and below the filler neck open? ive been driving like that for a year now. i have no oil spilage

 

I have the one on the bottom plugged, and the one on the filler neck vented with just a hose? I think they're just crank case ventilation.

I have that white condensation in my oil filler tube and have been thinking about a catch can of sorts.

I think they're supposed to go in between crank case ventilation and intake to prevent oil from gettin in your intake and gunkin stuff up. Spirited driving may splash some into the hose?

other than that I can't really think of a reason to run a catch can.

 

The MAIN reason to run a catch can is actually for when the car is being tracked heavily, and boosted heavily.

When tracking your car and exposing it to high and sustained cornering G's, your oil will - obviously - be subject to these forces. It (oil) will get sloshed up the filler neck and up the PCV (instead of simple vapours) and then it needs somewhere to go..........so you give it a nice little can to rest in while you beat your car on the track?

During normal street driving, catch can equipped cars should NOT fill up with their catch cans with oil. Unless you were doing some extreme cornering on your way out to dinner. Your can should only accumulate oil in the can during extreme cornering times (at the track) and after a day (about 3 ish hours spread throughout a day) I'll accumulate about 0.75-1 pint of oil.

Oh, and I don't have my PCV either, it was broken I just run one hose from a fitting tapped into the filler cap, and one hose from the vent on the intermediate iron, both going into my ATP can.