24v turbo CCV /Holset oil feed restrictor questions

[arams325]

SO i have a few questions about (ccv) Crank Case Ventilation on 24v turbo
I have done some reading and see there are a few options, what works the best?.
trm ccv to exhaust?
e39 vacuum pump?
in line oil catch can?

now to the Holset oiling question,my current build specs- Holset hx35 12cm on s50/otis manifold/external wg/trm tune. I have read alot of contradicting advice on oil feed and return for holsets. For oil feed some say run -3an with no restrictor, some say -4 with restrictor, but they never specify restrictor size.
I understand Holsets normally want a min of 10 psi at idle and around 70 at wot.

Now for oil drain- I have heard the recommended oil drain line is-12an due to the orifice being 19mm on the holset, Then others day -10an will be just fine as long as you run an oil feed restrictor. i would love to hear what you run on your Holset set up, so i can take the guess work out of the equation, I like to do things right the first time since improper oiling can wreck a turbo real quick.

I understand that i could run an adapter in order to check oil pressure with a gauge after the feed restricor to verify oil pressure, but if any of you have a similar set up i would defiantly like to hear what works for you. thanks

[ak-]

The best ccv setup I've seen work is literally just a hose to atmosphere or a non-restricted catch can in line to the atmospheric dump.
I've read too many issues with an exhaust check valve in terms of angle, placement, blah blah causing CC pressure. A pump would be awesome and most ideal, but I don't know what the cost on something like that is. A guy on Instagram named e30ordie is using one on his M20 and praises it - he also beats on his car daily (recreational drift car/isn't endorsing anything).

Journal bearing turbos can use -4 with no restrictor and is what's universally recommended. You'd use a restrictor if for whatever reason the oil pressure is too high.

People say -10 AN is fine because it is and can drain oil adequately as long as there are no silly angles or kinks that work against gravity. 19mm is bigger than -10 AN, so that's probably why Holset dudes recommend -12 AN.

-12 AN = 19.05mm
-10 AN = 15.875mm

I would do -12 AN because I wouldn't want my drain to taper like that even though it'll probably be fine.

You can use an adapter at the feed with a 3 way T-fitting or just mount the pressure sender at the block where you're getting your oil from the first place. I think having the sender for the gauge at the turbo/restrictor area is ugly :p

[wenbeaver89]

I'm running a catch can vented to atmosphere for the ccv

as far as oiling, i'm running 4an with no restrictor and a 10an return. thats a hx35 on an m50

[Northern]

Retain the PCV, but run a Mann ProVent instead of the cyclone separator, run the drain to the pan, and the vacuum port to turbo inlet.

These are made for boosted applications, will retain crankcase vacuum, and unlike a catch can vented to the turbo inlet, it won't slowly fill your charge pipes/IC up with oil.

[arams325]

does the mann provent use a check valve so once you go into boost it starts pulling vacuum? are you using a catch can with this set up just wondering how you have stuff routed i would be guessing it would be after the catch but im not exactly sure? I am curious about this set up i have heard of using a mustang corbra air pump used for pulling vacuum it was this one- http://www.carid.com/cardone/remanuf...Ej_BoCcRrw_wcB

[Northern]

does the mann provent use a check valve so once you go into boost it starts pulling vacuum?

No, I'd run it to the turbo inlet so you don't have to worry. If you installed it with a check valve after the turbo, it would only pull vacuum when you don't need it to (ie off throttle/out of boost/idle)

are you using a catch can with this set up just wondering how you have stuff routed i would be guessing it would be after the catch but im not exactly sure?

I'm not running one yet, but I plan to run it where the stock PCV is, run the drain to the dipstick drain and vacuum source to the turbo inlet. This is essentially a newer version of the cyclone canister, but built for boosted engines, with a pressure regulator and filter for the air passing back into the engine.

Pg 15 of their PDF shows a quick diagram of routing.

I am curious about this set up i have heard of using a mustang corbra air pump used for pulling vacuum it was this one- http://www.carid.com/cardone/remanuf...Ej_BoCcRrw_wcB

Sounds like a lot of effort to deal with wiring in addition to plumbing it in. If it came down to it, I would use one of the TRM exhaust scavenging setups instead, just for simplicity.