Let me first start off by saying the there ARE MANY DIFFERENT WAYS to install a catch can on a Rb20/25. I have a car in the project thread and I got 6 different PM's on if I can show how I installed mine. Well here it is. This is on a Rb25 There are some people who say you should also put a mini filter(ie. May 25, 2010. Just a quick question i want to verify, i was speaking to a couple of ppl and they are saying its a must for the hose that comes off the catch can to.

Title: Technical Articles: RB Catch Can/PCV Breather Guide The info needed is not limited to what is found solely in the RB section in which this thread links to previous threads, but the same principles follow much of all other motors. Previous threads which contain dialog of RB owners configuring their PCV and catch can setups (the good, the bad, and the ugly) For emissions related: For pictures of factory, modified, and custom setups: Ok now that you have researched and read through those threads Here are some examples of how you may setup your PCV, Catch Can, Breather Can, Vacuum, etc system: Cliff Notes: * Crank case must vent pressure that accumulates in the engine. * Either venting through a breather filter, catch can with breather filter, intake manifold, intake pipe, or exhaust. * Best results are found when the crank case is experiencing vacuum. * Vacuum sources generally used are intake manifold and intake leading into the turbo.

* If using the intake manifold as a vacuum source one must use a 1 way check valve to prevent the crank case from being pressurized when under boost. Biohazard 1 5 Download Psx Iso on this page. (read: pcv) * If using the intake pipe leading into the turbo for vacuum, source must be after the MAF (if equipped).

* If using the exhaust pipe exiting the turbo for vacuum, 1 way check valves must be used to prevent exhaust gas circulating back into the crank case. * If venting the valve cover either through a breather filter or catch can with breather filter(s), the factory PCV valve and intake port must be blocked off preventing those sources from sucking in unmetered air. (read: vacuum leak) * Plumbing can be made of various materials. If near high levels of heat, use protective/heat reflective material or hoses that can sustain heat. (read: do not have the plastic PVC hose near exhaust) *Catch cans can be made out of various materials or completed units purchased from various manufacturers.

* Catch cans with internal baffling, steel wool, etc. Have found beneficial in removing oil from vented vapor. * Baffles can also be adapted inside the valve covers of the RB25 and upgraded on the RB26. This system is as important as anything else to provide optimal performance and reliability. Providing a proper ring and valve seal. This system mentioned above is primarily focused on wet sump oil system RB’s which differs when dealing with dry sump’d RB motors.

Ok, I am working on installing a catch can onto the motor. I have already tapped the ports on each rocker cover to accept -an fittings, now am trying to decide on how to run the lines, and what to do with the PCV fitting. I have decided one of the three setups below would be best for me.

Windir System32 Mstsc Executive Order. I just have a question about the 'best' option. I have read that if you block off the PCV it creates better vacuum, I have read to leave the PCV also. I'm leaning towards fig 4 or the bottom, just trying to figure out if I should leave the PCV or not I guess. The vacuum line to the IM is only open when there is no boost and, therefore, very little blow-by. When the IM sees boost, the ball check in the PCV valve closes and any pressurization goes out the breather filter on the valve cover of your setup. Your setup is fine, but you have to make sure that filter stays clean because it can pass a lot of oil/water vapor and plug quickly causing lots of smoke out the tailpipe.