S13 KA24DET correct oil catch can & PCV setup

[Kenji001]

http://forums.nicoclub.com/zer...et-up (http://forums.nicoclub.com/zerothread/366874-pcv-set-up)
http://forums.nicoclub.com/zer...99790 (http://forums.nicoclub.com/zerothread?id=434767&postid=4899790)
Here is how you install a catch can,: CA18DE / CA18DET Forum: Nissan Forums / Infiniti Forums - NICOclub (http://forums.nicoclub.com/zerothread?id=137506)
http://forums.nicoclub.com/zer...age=1 (http://forums.nicoclub.com/zerothread?id=394372&page=1)

I want to install Circuit Sports (CS) Mini Style Oil Catch Tank (250cc) to my KA24DET.

http://www.frsport.com/Circuit....html (http://www.frsport.com/Circuit-Sports--CS--Mini-Style-Oil-Catch-Tank--250cc-_p_1511.html)

Nissan 240SX Silvia S14 S15 SR20DET Air Intake Systems

http://cgi.ebay.com/ebaymotors...ories (http://cgi.ebay.com/ebaymotors/Nissan-240SX-Silvia-S14-S15-SR20DET-Air-Intake-Systems_W0QQcmdZViewItemQQ_trkparmsZQ7c301Q3a1Q7c2 93Q3a1Q7c294Q3a30QQ_trksidZp4634Q2ec0Q2em14Q2el126 2QQhashZitem5acfd9aed9QQitemZ390034206425QQptZMoto rsQ5fCarQ5fTruckQ5fPartsQ5fAccessories)

After reading all those threads, I am still confused.

Could you confirm the following is the correct way to setup oil catch can & PCV?

PCV valve -> oil catch can -> one-way check valve -> pre-turbo intake

Basically in stock setup, PCV valve (one-way check valve) will vent oil/air to intake. Since there is oil in the blow-by, we want to use catch can to catch the oil but let air go through. This prevents dirty the air intake piping. The one-way check valve is to make sure the air will not go back to PCV valve under boost.

Am I understand it correctly?

Please bear with me as I am very new to turbo/PCV/catch can.

Thanks!

[PinkPanther]

Please do yourself a favor and DO NOT buy the circuit sports catch can. It is worthless; it leaks out of every fitting on it, and it has no internal baffles. I have one and I had to tear it apart and rtv all of the fittings on it and now it doesn't leak but it still doesn't really catch any oil vapors due to no baffling.

[Kenji001]

I re-read the post PCV set-up: KA24ET / KA24DET Forum: Nissan Forums / Infiniti Forums - NICOclub (http://forums.nicoclub.com/zerothread/366874-pcv-set-up)

(http://forums.nicoclub.com/zerothread/366874-pcv-set-up)
Do you think the followings will work with Circuit Sport Catch Can with 15mm (15mm = 3/8") connectors?
Brass Medium-Pressure Spring-Loaded Piston Check Valves Female X Female 3/8" (QTY 1)
McMaster-Carr (http://www.mcmaster.com/#7775k53/=2uvn1t)
Barbed Tube Fittings male 3/8" to tube 3/8" ID (15 mm) (QTY: 2)
McMaster-Carr (http://www.mcmaster.com/#5670k83/=2uvov0)

(http://www.mcmaster.com/#5670k83/=2uvov0)
I still have one more question. What do I do with valve cover breather connection?


I think other people do:
Tee connection between pcv valve and the valve cover breather -> oil catch can -> pre-turbo intake


According to WDRacing (http://forums.nicoclub.com/zerouser?cmd=viewprofile&id=3025) from Nico, this is wrong because the blow-by air/oil will go to back to the motor through the valve cover breather connection under boost. The catch can will do nothing in this case.

[Kenji001]

After reading honda and other people regarding PCV setup, I think the best solution is to connect PCV valve and valve cover breather to exhaust. In case, you don't want to leak oil on the road/track, connecting a catch can in between PCV valve and exhaust is a good solution.

Pro:
1) No need to worry about vacuum leak/tuning (no unmeasured air goes after to MAF).
2) Will have good vacuum in boost and idle/non-boost situation.

Con:
1) More complicated and expensive

To most people, venting PCV and valve cover breather to atmosphere is good because no need to worry about tuning. And most people claim that will work but it is not the best solution.