dimented24x7

iTrader: (2)

The baffle in my alum. valvecovers Im using doesnt really do that great a job at keeping the oil out of the intake, and there isnt room for anything bigger with my valvetrain. What are some good recommendations for an oil seperator?

I was looking at one from Steeda. Mounts inline with the PCV and looks like its nice and compact. Anyone ever try one of these?

jtsk

iTrader: (3)

I have never seen or used one of those, but it looks like it works on the same principle as a separator on an air compressor. Just wondering how much trouble it will be to keep it emptied? Have you thought about pulling your valve cover and welding a flat piece in place across the existing baffle (if there is room) to block off the oil to the pcv valve?

dimented24x7

iTrader: (2)

It has a low profile baffle in there that blocks the splash, but the mist is a big issue. Dont know how to get rid of that w/o a seperator since the particles are too small to be slung out of the air with baffles.

That one looks like it might have a fitting on teh bottom. If that were so, I could just plumb the drain back to the opposite valvecover and have it automatically drain back to the motor.

RPOL98

your might have to put some kind of check valve into your "automatic drain" to keep blow-by from entering your seperator via the drain maybe?

maybe there's no harm in having the oil vapors enter the separator from the drain also. not sure, i'd have to think that through.

Air_Adam

I'd suggest actually looking at the LS1 boards - reason being alot of LS1 guys have issues with oil in the PCV system, so they have been doing this for years now. You'll likely find alot better setups there.

Chevy86 IROC-Z

iTrader: (17)

Heres one that I found,


and this one,

Chevy86 IROC-Z

iTrader: (17)

This thread has gone dead. Has anyone tried this?

305sbc

iTrader: (3)

I've been filtering PCVs since the 80's.
For me, the cheapie plastic fuel filters do a better job keeping the air clean.
On high mileage engines with excessive blow-by I run a filter and PCV valve on each cylinder bank and T-connect into the PCV, and add another breather port. This dilutes the force of the oil mist at each filter and two can handle the job easier than one since each handles half of the blowby flow.

(photo below) This is a 200,000+ mile engine in a work truck and has filters on each PCV line and the breather (front).

Why? well my perspective as a cylinder head reconditioner & porter is that the oil through the intake will quickly cake the back of even a polished intake valve, and I don't like that. It is especially bad when combined with EGR. It hurts air flow, performance, and makes the parts harder to clean up.

If I recon some heads on a high mile work engine, then that doesn't really do anything about the blowby, so I have to tend to this issue as I described.

Many LS1 engines will have a pool of oil in the bottom of the intake manifold plenum if they don't run PCV filters. The LS1 has the PCV feed into a high velocity flow area of the plenum neck right behind the throttle-body. At WOT there is enough vacuum on the PCV line to feed oil into front runner adjacent to the PCV port on the intake, and this cylinder will often be the first to see detonation due to the oil mist.

Keep in mind that adding effective filters like the fuel filters I use will cut down the PCV flow, so it's usually a good idea to run a dual PCV system like shown below.

http://i702.photobucket.com/albums/w.../DSCF5917c.jpg

Chevy86 IROC-Z

iTrader: (17)

But if you use a cheap fuel filter, where will the captured oil flow to? I can see your picture but I dont understand the way your design works because I dont know how a carb system works nor do I know where and to what the hoses are connected to. I do have a small issue with vaporized oil which I want to eliminate. All I know is that on my IROC, there is a hose on the passengerside which suppllies clean filtered air from the throttlebody to the passenger valve cover. Then vacuum is applied via intake manifold, to the driverside valve cover.
vaclinesformyiroc.jpg?t=1325217059

TTOP350

iTrader: (8)

http://www.moroso.com/catalog/catego...?catcode=18549

RPOL98

I installed a Moroso 85478. attached it to my strut tower brace, near the brake master cylinder. I drain it about every 2-3 weeks (daily driver, ~30 miles daily), even though it's not full yet.

cut & welded the bracket to the brace. I did have to replace the brass fittings, it came with ones bigger than 3/8".

not sure why the "universal" version costs more than the application-specific ones. it seemed the 85478 (mustang) was the cheapest version at that time.

305sbc

iTrader: (3)

The liquid oil collects in the bottom of the filter if they are like those posted in my photo. Depending on the conditions you may want to clean them out once or twice per year. I clean them by spraying mineral spirits into the filter, then blowing them out with compressed air. It takes about 5 minutes to do them all and put them back on.
You can use a type of filter that will drain the oil back into the engine once the engine is shut off , - for example the type of fuel filter (front) used on the vent line in my photo. I prefer not to drain it back to the engine because the blowby oil is usually mixed pretty good with with the water-vapor in the blowby, and generally has a lot of carbon particulate contamination, also from the blowby flow. It's not the best thing to put back into the engine IMO.

The engine in my photo is a TBI system, but the blowby/vent/PCV works the same on any engine. It's up to you have you want to arrange the lines.
In my photo I have PCV valves in each valve-cover and I'm venting via the front of the intake manifold. I had the intake manifold off anyway so I drilled and tapped the front of it for the extra vent. I used a threaded brass fitting that vents from the lifter valley area. There is a screen underneath to stop any oil splatter. Where you choose to vent from is up to you.

Sometimes I install a port fitting to the fuel-pump block-off plate at the bottom of the engine and add a hose and a similar filter near the top of the engine.

If your filters fill up with oil more than about twice per year, then you most likely have inadequate baffling under your PCV valves, or a really crazy amount of blowby pressure due to engine damage.

IMO, watching the contents of the blowby via a filter of some kind is a great way to keep an eye on the health of the engine. When you see changes in the volume or color of the blowby it can alert you to problems.

brass fitting on front of intake manifold is for the vent.
http://i702.photobucket.com/albums/w.../DSCF5801b.jpg

Orr89RocZ

iTrader: (20)

Yep, my 99 LS1 sucks oil in and being a daily which sees 40miles a day on average with some days seeing darn near 100 miles, I need to do this asap