PCV Valve / Rocker Cover Breather
- Thread starter Aidan@EP-styling
- Start date
Rory
Lifer
Right i never noticed you changed it on this thread, yes thats fine to run like that.
I was talking about the new drawing :
Isn't this drawing good ?
1. Disconnect the hose from the PCV valve and inlet manifold.
2. Find a suitable place to mount the catch can.
3. Connect a hose from the PCV valve to one of the ports on the catch can.
4. Connect another hose from the other port back to the inlet manifold ( where the original pcv hose connected).
Job done.
I was talking about the new drawing :
Isn't this drawing good ?
The drawing is good -)
I've recently bought a catch tank with a breather and I was just wondering, how to install it with the above setup, how do you block the inlet manifold?
And after washing the can, I've come up with an interesting question! If I fill the can with water, it will only flow both ways on the short pipe, does that mean that there is some sort of valve on the another pipe?
And are there 2 pcv valves or just 1? because if there are 2 breathers, how does the second work without the pcv valve???
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Hey guys, just a simple quick question.
Instead of leaiving the pcv valve connected to the inlet maifold, if we block off the vacuum pipe thats conencted to the pcv valve (taken into consideration that the pcv is gutted and into the OCC, and OCC out to atmosphere), will this result in less power and worse FC? Can this be compensated by re-mapping the car?
Will remapping the car result in better performance/FC once the inlet hose is blocked off compared to when the PCV was still connected?
Instead of leaiving the pcv valve connected to the inlet maifold, if we block off the vacuum pipe thats conencted to the pcv valve (taken into consideration that the pcv is gutted and into the OCC, and OCC out to atmosphere), will this result in less power and worse FC? Can this be compensated by re-mapping the car?
Will remapping the car result in better performance/FC once the inlet hose is blocked off compared to when the PCV was still connected?
Blak_Mamber
Member +
I used a short piece of silicone hose and blocked the end of it with a screw.
This is how mine is set up too.
danturbo4311
Member +
Both above examples are correct depends what type of catch can you've got. But you must remember that with the valve in place you will only have one breather open on boost which is why people run both open like myself
will the block off part result in shitty idling? As i know that the PCV valve is working via vacuum suction and it means that AIR is flowing through from the rocker cover going in. We may or may not be compromising the amount of air going into the intake manifold. Any debate on this?
danturbo4311
Member +
Aslong as the pipe is blocked off properly I.e not leaking it won't affect the idle there are mainly two problems when using the pcv valves. The catch tank may not catch everything so you May end up with a small bit going back into the intake and the fact theres only one breather when on boost. If you get rid of the pcv valve you obviously loose the suction affect of the vacuum but aslong you change oil often it shouldnt make a difference. When Toyota designed the breather system they did it for factory power and had emission regulations to abided by. In my opinion if running more power than your gonna want more than one breather on boost as otherwise you could end up with crankcase pressure problems .
I definitely understand that if we do not block off the suction hose, we'll definitely loose some boost because there'll be a leak in the vacuum system.
But again, if the PCV valve is open and air goes in, and your rpm stays at 850-900, why wont it drop to 700 if we completely block off the valve/suction hose?
But again, if the PCV valve is open and air goes in, and your rpm stays at 850-900, why wont it drop to 700 if we completely block off the valve/suction hose?
pics?
this is how i have my catch tank setup:
the catchtank goes back into the air intake so that as the turbo sucks it draws the vapours out the rocker cover
Just 2 questions about this setup!
1) Do you still have the pcv valve?
2) Where exactly it goes from the OCT?
Thanks!
Well reconsider the installation after reading a few theads about the Oil Catch Tank setup...... totally confused tbh!
Most of the thread covers the PCV valve hose only, how about a second one? does it breath in only or does it work both ways - that is what I don't understand!
Until 1965, most cars and small trucks had a vent, often called a road draft tube, which vented the crankcase to the atmosphere. After 1965, legislation brought forward a governmentally mandated device to be installed on all vehicles. The positive crankcase ventilation (PCV) valve is a simple system that introduces filtered fresh air into the crankcase. The PCV valve uses the engine’s vacuum to pull air through the crankcase and reintroduce it back into the intake manifold system. This sends the uncombusted hydrocarbons and nitrous oxides that blew by the rings another chance for complete combustion, and in later vehicles, to be managed by the engine’s emission control system.
http://www.machinerylubrication.com/Read/234/pcv-system
According to this the PCV valve works both ways and the standard setup would be the best as it would provide clean air in and get all that 80% unburned petrol back in to the inlet.....
http://www.autoshop101.com/forms/h63.pdf
http://www.machinerylubrication.com/Read/234/pcv-system
According to this the PCV valve works both ways and the standard setup would be the best as it would provide clean air in and get all that 80% unburned petrol back in to the inlet.....
http://www.autoshop101.com/forms/h63.pdf
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