Catch Can connections?
- Thread starter nathan007
- Start date
you let the intake suck in blow-by.
this is collected from the crankcase and valve cover.
PCV valve flows this, it closes at idle and WOT.
A catch can sometimes goes old skool, downdraft style. Before PCV blowby came out. other times, inline.
so catch cans, either way, are basically filter boxes.
this is collected from the crankcase and valve cover.
PCV valve flows this, it closes at idle and WOT.
A catch can sometimes goes old skool, downdraft style. Before PCV blowby came out. other times, inline.
so catch cans, either way, are basically filter boxes.
Last edited:
Russianred
Snail Spools You!
Catch can should be installed between the 'blowing' port that comes from valve cover, and where it attaches to the intake manifold where it sucks the vacuum in. This way any blowby not limited by the PCV valve will be caught in your can. If BOTH ports on valve cover are blowing air out, THEN you can combine the two ports in this method. If one of the ports on valve cover is 'sucking' air in, then do NOT combine the two valve cover ports! You will interfere with the natural flow of the vacuum system. This method only applies to naturally aspirated setups. For Turbo builds, it would be routed differently.
Hopefully this helps, feel free to rep as needed.
Hopefully this helps, feel free to rep as needed.
ALRIGHT! ill check to make sure the vent to intake tube is actually blowing air out like pcv, the reason i plug my catch can to the intake tube instead of the intake manifold vacuum is that is was deleted so i would need to splice my brake booster vacuum line instead, wich id like to avoid
The PCV is not there to limit vapor flow out, it's there to limit flow air flow INTO the manifold.
Unless you're increasing crankcase vapor, ie: blown rings / boost, I usually don't mess with the PCV system. If you're adding a filter, to a basically stock system, add it between the pcv valve and manifold.
P ositive
C rankcase
V entilation
Unless you're increasing crankcase vapor, ie: blown rings / boost, I usually don't mess with the PCV system. If you're adding a filter, to a basically stock system, add it between the pcv valve and manifold.
P ositive
C rankcase
V entilation
Russianred
Snail Spools You!
Basically the gist of the whole conversation ^.
kleen98accord
Well-Known Member
If you're really getting a lot of blow by I would suggest having a baffle in the catch can.
