Install aftermarket valve covers that have one hole in each, drill and tap two additional vaccuum ports on the back side of the intake manifold, and install PCV valves on both valve covers?

I'll admit I've never seen an engine that was running PCV's in each valve cover, so I'm not sure if the reasoning behind it is because it's considered overkill or if it will cause problems. The rationale behind this idea is to prevent unmetered air from entering the engine so that it won't interfere with any later attempts at tuning the PCM. Also, (whether this will actually occur remains to be seen), I'm thinking that going from one to three PCV's will make it that much easier for the crankcase to breathe.

This idea has nothing to do with "reinventing the wheel" and everything to do with maintaining stock functionality with aftermarket valve covers. Anybody see any problems with this?

 

Somehow you need to get fresh air into the crankcase.... that's what sweeps through the crankcase and the lifter valley to clear out the blowby gasses. Going to three PCV valves would probably clear out some of the blowby, but its no longer operating the way it was designed. You'll be pulling a bit of vacuum on the crankcase, just not getting any crossflow with clean air.

What's wrong with the stock setup?

 

I think he wants to run aftermarket valvecovers but is worried about unmetered air going into the system through a breather.

thesoundandthefury: unmetered air only comes if you switch to a breather style vent. If you keep the stock setup where your fresh air comes from that port near the throttle body (is it on the tb?) then the air will still be metered, you may have to get creative in your plumbing but as long as you have the pipe end up there the air will be metered as the connector for the vent is after the MAF.

 

Are PCV valves "directional," as in only allowing air to flow through them in one direction?

This part looks somewhat similar to the stock plug that fits in the rear hole on the passenger's side valve cover:


If I were to eliminate the stock PCV valve from the intake manifold and plug the hole for it, use a regular PCV valve in the driver's side cover and run the line for it to the vaccuum port that the stock PCV used, and use this Deutsch valve on the passenger's side cover and run the line to the bottom throttle body port like it is stock, would that be workable?

 

The PCV vent air line is attached to the TOP connection on the TB.

Yes, PCV valves are "directional".

Not clear at all what you are trying to do with these revisions. You will have one PCV valve on one cover flowing into the vacuum port the PCV valve in the manifold used to be attached to. Then you add another PCV valve on the other valve cover and run it into the TB port, an somehow hope that the air will not flow out of the TB, through the PCV valve and into the other valve cover.

Which way are you "pointing" the PCV valve that is connected to the TB? To allow only flow from the valve cover to the TB? Won't work... no fresh air into the crankcase. Or only to flow from the TB to the valve cover? Should work fine, because that's pretty much what the stock system does, and you don't need the PCV valve to accomplish that, the stock plastic elbow does that.

Still asking the same question..... what's wrong with the stock system. Put the fill cap in the hole on one valve cover and run the air supply line from the TB to the hole in the other side valve cover = no unmetered air.

I think you're going overboard on the whole issue.... with a breather, a little air flows in, and the long term fuel corrections take care of it. I've spoken out many times against "breathers' because they don't accomplish anything, but I've also pointed out that its no big deal either way.

 

Thanks for the feedback Injuneer and Lienus, I have a clearer picture of what I'm dealing with now.