S2000's smoke realy bad at my local track Roebling Road. I was running a catchcan with lines from the PCV and breather and vented to atmosphere but didn't like the fumes driving to the track.
As I understand the PCV doesn't do much on the track it works at low rpm's and idle - my cars been acting funny and seems to work better driving around normally with the PCV enabled.

So my new setup I put a cheap ebay catchcan on the breather and a switch on the PCV to turn it off at the track.
Ran three sessions the other day and didn't smoke at all that I noticed. The catchcan caught a fair amount of oil I am not sure if it filled but I might get a bigger one to be safe.
Found some oil residue in the intake tube and throttle body but not a huge amount and no smoke.

https://www.ebay.com/itm/8mm-5-16-Ho...53.m2749.l2649

https://www.ebay.com/itm/Universal-C...53.m2749.l2649

 

I always found the pcv hooked up to vacuum sucked the most oil in my AP2. I have stalled the engine because there was so much oil in my intake. I have only seen boosted cars discharge oil through the breather when the pcv is routed to the intake mani.

 

I agree with the above. The PCV is the main culprit.

One alternative to the above setup:

Route both the PCV and the crankcase vent to the catch can ports, mount the catch can lower, drill a hole into the side of your intake box (where your catch can is currently attached) then attach a top breather tube to the catch can, route it through the hole you've made, and attach the catch can vent filter on the other side of the airbox? This would allow everything to vent the way you had it before, and whatever fumes should be sucked up by your intake but without excessive vacuum?

Something like this, except connect a rubber hose that relocates the vent filter to the other side of the airbox.

 

PCV is where I see the most oil, as well. I'd change your routing and route it similar to this (remove to drill out PCV if you're doing VTA):

 

^ I think the OP had it that way before, but the fumes of the atmospheric vent of that catch can was bothering him, so he wanted the fumes to recirculate into the intake.

 

Gotcha, I see now. Misread, my bad. In that case, I'd try to do something similar to the Radium setup. Keep the PCV, closed loop, don't VTA, individual cans for PCV and crank case:

 

Even with my dual can setup and 100tw tires I was overflowing my catch can in 1 lap at Roebling. Yes you read that right.

The only real way to stop all of it is to do the valve cover mod. I highly, highly recommend it. Then your catch can setup will be fine the way it is now.

Davo

 

We get it Dave. Your faster than us now. Gawd.....

 

It's very track dependent. I get 0 drops unless I'm at Gingerman, but there I went through like 2 quarts and sprayed oil everywhere.

 

rainh8ter valve cover mod and you dont need a catch can. he has a thread in this section of the forum. if you watch the video in his post thats my silver s2k that he did testing on. after that i went home and spent the next weekend modding my valve cover. never had the problem again.