I've read several threads on here about the need for a PCV setup, with PCV in one valve cover and a breather in the other.

Just wondering, does anyone know if this setup will accomplish the same purpose? Milodon doesn't actually refer to it as a PCV, but seems it would work.

http://www.summitracing.com/parts/MIL-85682/?image=large

That's kind of like having two breathers... except the one with the nipple is normally vented to the air cleaner housing. Most of the fumes will go in front of the air cleaner and eventaully foul it. It will work but won't ventilate the crankcase as well as a breather plus PCV under light and medium load.

No it won't do the same thing as a PCV because you can't hook it up to a vacuum source and have it work. The PCV isn't just an empty tube it is a valve that you can hook to a vacuum and not cause your engine to poorly.

It would work if you connected that nipple with a hose to the header collector with a fitting welded into the collector at a 45 angle & it's shaped like a hypodermic needle & the exhaust flowing past it draws fumes out doing the same function as the PCV does. Supposedly in a street car there is not enough velocity for this to work well as it does in a race only eng. It will add unburned hydrocarbons to the tailpipe emissions but it does eliminate the controlled vacuum leak of the pcv into the intake tract.

Another thing to consider is that PCV valves have different metered amounts of airflow for specific applications. The metering is pretty close from valve to valve, however I noticed this on my /6, when I used a V8 valve I had lying around. It flowed too much air for my little slanty. Once I used the correct vavle and it idled and ran beter off idle with out the flutter at the PCV valve.

This breather you're referring to has no metering what so ever. It just attaches the hose to the valve cover and runs the air through an internal sponge or something to separate the oil mist....No?

Here is What I used.

They are available at Autozone and are chrome. They have a hole in the top for a PCV valve and no breather holes on the underside.

Use one of these in one valve cover and a regular breather on the other valve cover.

All you have to do is get a grommet to adapt your PCV to this and your good to go. The grommets are also available from just about any parts store.

Technically is this a breather or an adapter?

PCV-> Positive Crankcase Ventilation
as long as outside air gets circulated through the crankcase, the engine
dosn't care how its done. Either by a PCV, dumps into the header collectors,
or what the OP shown. Personally I don't like PCV's or the oil mist that
gets drawn through the intake and burned.

POSITIVE, not neutral, as in created by vacuum. With nothing but that breathers you don't have circulation which is the idea of PVC. Even with it going to the headers you still get a vacuum with the exhaust flow.

POSITIVE (high) pressure in the crankcase yes I know that. Intake manifold, exaust, or the ATMOSPHERE
act as NEGITIVE (low) pressure until it equalizes with the crankcase. then its neutral. remember, high
pressure always seek low pressure. dosn't care how it get there, as long as it does.

Atmosphere will not work. It won't supply a positive to negative flow. It will only produce a neutral for venting. There must be a negative for correct scavaging.

Atmosphere dosn't need to supply a flow. just an escape.
IF the atmosphere(14.1psi) is of a lower PSI then whats in the crankcase say, 14.2psi+, thats (atmosphere) negitive pressure.
Same principle as when you deflate a tire.

I guess what you are failing to understand is that a PCV system is a scavanging system not a vent system or it would be called a cv system. The problem with your statement is that atmospheric pressure is negative. Its not it's just lower than the internal pressure of the crankcase or tire. Lower doesn't make it negative. It's by nature neutral not negative. After all we don't live in a vacuum which is what negitive atmospheric pressure is.

whatever you win.
end communication.