Which would be best for now?

[SMOKEDYA]

On my turbo motor which type of breather would work best till i do my catch can set up? peace

Proform Parts 66012 - Proform Air Breather Caps for Chevrolet - Overview - SummitRacing.com

or this type?
Moroso 68791 - Moroso Valve Cover Filtered Breathers - Overview - SummitRacing.com






john

 

[Noobz347]

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.

 

[SMOKEDYA]

Right now i currently have the PCV in the lower intake blocked off. So untill i do my catch can just getting ideas?But i just noticed alot of the stuff for my catch can set up is on sale now from summit so i may just bit the bullet?But incase i dont is why i was wandering which to use for now.peace







john

 

[Noobz347]

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.

 

[SMOKEDYA]

any pics or diagram of this way? peace




john

 

[Noobz347]

Nope but I can work something up for ya, if you like.

 

[SMOKEDYA]

If i run that type for now...do i leave them open or do i connect a hose leading away from the engine compartment?Or will no oil leak out of them?peace









john

 

[GroverDill]

I just went thru this with my set up and was told by many that the remote catch can is the way to go on turbo cars. I suggest doing that right away and not doing it twice.

good luck

 

[Noobz347]

You would only need 1. It would go from your passenger side valve cover, through a one way check valve (brake booster valves from the "help" section work great) and run into the intake.

 

[GroverDill]

As you know lots of turbo guys block the PCV and run large vents on each valve cover. I have 3/4" internal diameter hose from each valve cover going to a remote mounted and vented canton can.

 

[Noobz347]

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?

 

[GroverDill]

I ran the same type of set up as you with the S trim, the turbo set up has a vented catch can with no return to the intake tract.

 

[Noobz347]

Hmmmmm.... a vented catch can. Admitedly, that's the first I've come across that particular setup. Are there check valves in that setup to keep from entering?

 

[GroverDill]

Nope wide open. This set up is widely used in the turbo world and recommended by my tuner as well.

I do not have much seat time in the car with this set up as of yet as I am just finishing up some small things now.

 

[Noobz347]

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!

 

[SMOKEDYA]

Any reason you did one hose in the back and one in the front of each valve cover?Or was it cause thats how they were drilled?A guy on corral used the set up i started tis post about,he used the ones you suggested Noobz347 and he says it works great. peace






john

 

[GroverDill]

Just how the covers came, no reason.

 

[RacEoHolic330]

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.

 

[GroverDill]

Yes no intercooler yet. Yes again that is meth in the tank to act as a chemical intercooler