PCV valve set up for 430

[Theo]

That's right. Those engines are usually a can of sludge. The best way and most radical way I can think of is by holes in the valve covers just as they used to rout the pcv system in late 60ies Ford vehicles.
But I assume most of you won't touch the original closed type valve covers.
Anyway, here's the way I eliminated my 62 T Bird's road draft tube. Using Shelby Cobra covers things went easy. One bank draws fresh air from the inside (Clean air side) of the air cleaner housing right into the pcv valve which sits in a rubber grommet in the valve cover. The opposite valve cover is connected to the carb spacer by an other rubber hose and a 90 degree tube fitting in a grommet. So basically the crank case gets vented by filtered air which is drawn by the carb spacer connection.
Do the moon covers come w. knock off hole provisions for PCV?

[KULTULZ]

But I assume most of you won't touch the original closed type valve covers.

Thank Goodness!

Anyway, here's the way I eliminated my 62 T Bird's road draft tube. Using Shelby Cobra covers things went easy.

One bank draws fresh air from the inside (Clean air side) of the air cleaner housing right into the pcv valve which sits in a rubber grommet in the valve cover.

The opposite valve cover is connected to the carb spacer by an other rubber hose and a 90 degree tube fitting in a grommet. So basically the crank case gets vented by filtered air which is drawn by the carb spacer connection.

The way I read your description, it sounds like it is plumbed backwards.

Do the moon covers come w. knock off hole provisions for PCV?

I would think not as the MEL Series never used rocker cover sourced PCV.

[Theo]

The way I read your description, it sounds like it is plumbed backwards.

Hmmm, I don't know if it is backwards. I went to the garage to see how I did it. It's been almost 20 years ago so I have to correct my first post a little. sorry. In my installation air is drawn by the intake manifold instead from the carb base. That's because my phenolic spacer didn't have a provision for that. It's the same principle anyway. Here's a cheesy drawing of how I plumbed it up.

typicalcvs.jpg (9.29 KiB) Viewed 10135 times

[keithol]

Looks good to me , except for the manifold hookup, obviously it worked fine for you, but on some engines you could have issues with uneven fuel distribution. PCV is almost always hooked in to a central point where all cylinders get an equal share of the metered vacuum "leak". Also the Moon valve covers do not have any knock outs , and if someone is contemplating drilling a hole in stock covers, you should have a baffle in place so you do not vacuum up oil ,on the valve end at least.

[Theo]

Yes, that's right. I would have preferred a central inlet like a fitting right into the spacer, but it worked fine.
I'm probably going to drill and tap this phenolic spacer to accept a fitting in the future. Some cars have an in-line moisture/ oil trap canister that goes before the spacer. I'll install one of those cheapo plastic canister devices too. They are about double the size of a typical FoMoCo fuel filter. My engine compartment isn't a correct resto anyway. So that'll be fine w. me.

[Theo]

I wonder how much the inconsistency of the secondary flow does affect the PCV flow. Hooking up the PCV via the carb base will almost always rout the hose from behind the base plate. It will only be full operational w. the secondaries air flap open.

[KULTULZ]

I wonder how much the inconsistency of the secondary flow does affect the PCV flow. Hooking up the PCV via the carb base will almost always rout the hose from behind the base plate. It will only be full operational w. the secondaries air flap open.

A 4V spacer that draws from the rear usually has channels in the casting that will ensure the signal is sourced from the primaries.

If you will notice, LINC (61/68) routed their inlet to the front of the spacer. FORD did not.

Sourcing a single runner for the signal will not only disrupt flow to that one cylinder (dual plane intake) but will allow ingesting fumes into that one cylinder. That is why you want the draw from the carb plenum to evenly distribute the fumes.

[Theo]

A 4V spacer that draws from the rear usually has channels in the casting that will ensure the signal is sourced from the primaries.

Went to my garage and took a look on a few left overs. My orig. 62 T-Bird spacer (see pic) only routes to the secondaries. I had a serious air leak when I purchased the car 20 years ago. I replaced the carburater gasket several times w/o any change until I realized that the spacer was routed in a way that it makes the usage of an original curved Ford gasket mandatory. You usually don't look under a carb base.

The other FoMoCo spacer I found (not sure what car) is doing the same thing from the rear as well. However at least it tries to duct a little more efficient. Yeah, old cars are les than perfect. We love them as they seem to be similar to ourselves.Ha Ha.

Sourcing a single runner for the signal will not only disrupt flow to that one cylinder (dual plane intake) but will allow ingesting fumes into that one cylinder. That is why you want the draw from the carb plenum to evenly distribute the fumes.

Yes that's true, but I think it is not up to a very dramatic extend. PCV flow is much less than the mass that a cylinder is flowing.
Ford has done it just like that in those days. You're right. It's not perfect, but works. As far as I remember on my former stck. set up the T_Bird was also drawing vacuum for the power booster from the same T type fitting in the manifold. I didn't like it that way because fuel vap. would crawl up to your booster diaphragm in park situation. Off course I changed it. The booster gets vac. from the E-bock carb now.