This one:
View attachment 199428
Put into the driver side valve cover so it doesn't allow unmetered air into the system. I've seen others run a second PCV from the driver side valve cover in order to increase the volume of air to the PCV and slow down the velocity of air coming from the upper intake. The logic behind it is that decreasing the air velocity and increasing the volume would cut down the amount of vaporized oil that gets picked up and tossed into the intake tract.
View attachment 199428
Put into the driver side valve cover so it doesn't allow unmetered air into the system. I've seen others run a second PCV from the driver side valve cover in order to increase the volume of air to the PCV and slow down the velocity of air coming from the upper intake. The logic behind it is that decreasing the air velocity and increasing the volume would cut down the amount of vaporized oil that gets picked up and tossed into the intake tract.
I try an steer away from the whole catch-can deal if possible. Most of them don't work. They catch 'some' of the oil vapor by accident but the rest of that atomized oil continues through the tract like it always did.
Currently, I run two separators. One inline with the PCV through a one way brake booster check valve, and the other through the vent line that runs to the filler neck.
A screen in the intake, a GOOD PCV, and a separator should be all that you need. I ran the additional inline check valve bacause I suspected that the PCV was doing an adequate job. I'm also running a second check valve from the Driver side valve cover to help keep the PCV air low and slow.
On my boosted app, I empty maybe half a tablespoon form the separator every two or three gas fills.
Currently, I run two separators. One inline with the PCV through a one way brake booster check valve, and the other through the vent line that runs to the filler neck.
A screen in the intake, a GOOD PCV, and a separator should be all that you need. I ran the additional inline check valve bacause I suspected that the PCV was doing an adequate job. I'm also running a second check valve from the Driver side valve cover to help keep the PCV air low and slow.
On my boosted app, I empty maybe half a tablespoon form the separator every two or three gas fills.
Grover...
How much oil does your can pick up?
The problem I had with the can I used to use, was that it would only catch maybe half of the suspended oil vapor. The rest would still go through the inlet tract. It wasn't until later that I ran the oil separators and the additional hose to the valve cover to slow down the air.
Now I get maybe a tablespoon or so that I empty irregularly.
Are there cans out there that consist of more than just some wire mesh to filter the oil out?
How much oil does your can pick up?
The problem I had with the can I used to use, was that it would only catch maybe half of the suspended oil vapor. The rest would still go through the inlet tract. It wasn't until later that I ran the oil separators and the additional hose to the valve cover to slow down the air.
Now I get maybe a tablespoon or so that I empty irregularly.
Are there cans out there that consist of more than just some wire mesh to filter the oil out?
I've tried the valve cover/breather method before and noticed and intermittent stumble at idle or sometimes an elevated RPM at idle. I couldn't pin it down. I went back to a closed system and all that went away.
Your catch can setup with check valve to keep air from being drawn back into it, may be the hot ticket!
Your catch can setup with check valve to keep air from being drawn back into it, may be the hot ticket!
Grover, I didn't know that your setup was non-intercooled. Are you using methanol injection to cool things down? Is that what the pink fluid in the plastic tank is?
Once you get some more seat time, keep us update regarding your blow-by issues. I have an RNH 331 in the works that will also be turboed and I'm trying to determine the best way to tackle crankcase evacuation. I know the valve cover vent lines are popular, but I'm a little concerned about getting accurate MAF readings with a setup like that.
Once you get some more seat time, keep us update regarding your blow-by issues. I have an RNH 331 in the works that will also be turboed and I'm trying to determine the best way to tackle crankcase evacuation. I know the valve cover vent lines are popular, but I'm a little concerned about getting accurate MAF readings with a setup like that.