Technical Oil Pan PCV

Im looking for any opinions or experience with a non typical pcv setup. I came across a few pictures of breathers placed on oil pans.

I was wondering if that location could be used as the air intake and a valve cover pcv could be used. Or possibly the pcv near the oil pan and a breather up high on the cover.

Also would the crankcase produce to much pressure and blow oil/mist out the breather? It would be under vacuum though.

Do you think the custom breather with pcv and a line running up to intake would be satisfactory?

If it matters I'm designing this system for a straight six chevy. Thanks again.

 

what kind of straight six Chevy? The older ones (235 etc) have a baffle on the side of the block for the vent. The later ones (250 etc) do it all in the valve cover. Keeping oil where it belongs is usually the issue...

 

It is a '66 250ci. My goal is to not mutilate a tom lowe valve cover with a bunch of holes.

 

Any opinions on this working?

 

As long as you have a good baffle, and the inlet is a good ways above the oil level, so it does not get in when you are cornering, it will work just fine.

Numerous engines have road draft or PCV passages that go to the oil pan/crank galley.

 

I've seen them run the PCV out of the side cover on a 250 before. I didn't chose this route due to finned side covers.

 

I will also be going with tom's finned side covers. I definitely understand you not wanting to cut up quality parts.

 

I have seen the breathers on the pan on flatheads and the Gimp is correct here you want to make sure that you are not flooding your be breather or PCV with oil that could be a very bad thing. But the upside is your top end will be well oiled.

 

So would you think the air intake should be placed down on the pan and gases pulled up to the valve cover to exit through the pcv? My gut says up and out

 

The basic idea of air entering the pan and being drawn up to a pcv should work OK, but it's not a good idea to have the actual air intake that low on a street engine. You want cleaner dryer air to enter the engine, and extending the intake higher up the engine through a tube or pipe, and topped with a filter, would be much better, imo. This would also help act as an oil baffle.

 

Ok thanks. Ill have to research any clean ways of accomplishing that. I will say this would be on a mostly fair weather vehicle with open hood sides.

 

I've seen them mounted where a mechanical fuel pump would mount on a V-8. That being said not sure if it would work on a 6.

 

Was it the breather or pcv that was in the fuel pump location?

 

I thought it was funny that this image recently came up on a featured article.