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Possible Catch-can routing
Posted: Sat Jun 10, 2006 9:10 pm
by IronMonkeyL255
Does anyone have online access to AutoSpeed Online?
If so, I found an article that may help us figure out a way to install a catch-can.
I know that we have found out that USDM and Australian PCV systems are different, but Maybe we can apply the same principles put forth in this article towards our much beloved vehicles.
Here's the article. I'm broke ATM, otherwise I'd sign up foir online access to it. To make it up to the fine folks at AutoSpeed, I will sign up once I find another job.
http://autospeed.drive.com.au/cms/artic ... A=1101&P=1
Posted: Sun Jun 11, 2006 12:32 am
by Binford
ummmm............What needs to be figured out? I've got a catch can on my car. Total cost of about $35. I just bought a cheapie off ebay. I have no complaints about it whatsoever.
Posted: Sun Jun 11, 2006 12:53 am
by IronMonkeyL255
How do you have it running?
It has been discussed, but that I've seen, nobody has routed one that keeps all the various systems intact.
I was thinking it wouldn't be hard to run 2 cans: 1 for the valve cover tubes and 1 for the PCV system.
Posted: Sun Jun 11, 2006 7:49 am
by Binford
My catch can has two nipples on top. Just run the two valve cover vents and the center block vent(kinda under the turbo) into one. Run the other nipple to the pcv valve. Done.
Posted: Sun Jun 11, 2006 5:12 pm
by All_talk
I’m not arguing with Binfords setup, I’m sure its working good for him but understanding how the stock system works is key to getting the best results.
There are two vacuum sources, the PCV valve for low throttle (manifold vac) and the turbo inlet for high throttle (manifold boost). Both of these vac sources should be plumbed in to the suction side of the catch can. And to keep the PCV from sucking air through the turbo inlet there should be a check valve in turbo inlet line (though I don’t think the factory used one). The large crank case vent at the back of the block should be routed to the inlet of the catch can. The two valve cover vents to the rear are the fresh air intakes, leave them plumbed to the intake pipe so they draw filtered air. The two forward valve cover vents and the front center vent are a balance system, I would leave them as they are (Note: only the USDM EJ22T has these?). The catch can does not change the function of the stock system, it only provides a place for the crankcase vapors to slow, cool and condense so they don’t get drawn back through the engine.
Gary