Just trying to make this function better with what Ive got.
This is on my turbo civic.
Previous owner has the 'vent' (shown below) connected to the black box (see second picture)
The PCV valve is also still hooked up normally. This seems completely pointless to me. The valve cover vent has the usual filter on it.
I cant seem to think straight and figure out someway this will do something or how to set it up where it will.
Gonna try to scour more PCV threads for ideas. Itd be great if anyone can shed some light on this for me.
Also, where the vent is connected on the black box, is that a normal outlet, or was that 'custom'?
Stock NA car the black box should go to a pcv and then to the intake manifold.
The valve cover vent should be hook to the intake tube. On oem there is a cut tube so that air goes into the valve cover.
Stock NA car the black box should go to a pcv and then to the intake manifold.
The valve cover vent should be hook to the intake tube. On oem there is a cut tube so that air goes into the valve cover.
Im thinking PCV valve gets ditched and I run a simple check valve from the intake to the breather box and leave the valve cover vent without a filter.
This way under vacuum the crankcase is under somewhat of a vacuum, but when check valve closes it still has the valve cover vent and the breather line from the black box to vent.
Then vent both lines.
The black box should be vented to a hose without the pcv,
And the valve cover vented also.
You can get a catch can and make all this look nice and also hook up a port on the can to the intake of the turbo to help suck out the blowby but that can get messy and send oil into the turbo and intercooler looking.
idle vac should not have change unless you undid a vacuum hose.
Now throttle vac should go to 0ingh faster because the turbo is spooling mor.
About it smoking more im not 100% sure on that. Venting the crank should let out all the pressure build up.
the way you have it now, open VC breather and open black box breather, while not environmentally friendly, is optimal. that's two places the crankcase pressure can escape from under boost.
as for the smoking under deceleration, how are your valve guides/seals looking?
Typically you want to hook a catch can, mounted in as low and cool of place as you can find, to the VC then a hose going to the pre-turbo intake. With everything just vented to atmosphere the crankcase does not pull vacuum which makes it more difficult for the valve seals to seal, which can cause some smoke on deceleration . The idea of mounting the catch can in a lower and cooler place with baffling is so that the blow-by will cool down and settle in the can, you still suck some vapor through the turbo, but it shouldn't get messy.
Vent the valve cover and black box to a vented catch can. No PCV valve.
That is the right way to do it for a turbo setup unless you're bound by strict emissions/inspection laws
The additonal blowby from increased cylinder pressures makes the absense of vacuum in the crankcase less necessary. Emissions will suffer since you're venting hydrocarbons to the atmosphere and your oil may be more saturated with hydrocarbons but the absense of them in the intake charge usually outweighs these points
Im going to vent the line coming from the black box to atmosphere, run the valve cover breather tube to pre turbo, the filter I have happens to have a hose barb fit onto it and run a check valve from intake to breather box.
Im going to vent the line coming from the black box to atmosphere, run the valve cover breather tube to pre turbo, the filter I have happens to have a hose barb fit onto it and run a check valve from intake to breather box.
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