Now, with the way you have it hooked up....

Are your filters inbetween the intake manifold and the PCV valve, or are they between the PCV check valve and the valve cover?

If you have them inbetween the intake manifold and the PCV check valve, It's only a matter of time before we see a thread about a "explosion sound" comming from under your hood. I seriously doubt those filters can sustain anything over repeated 5psi boosts.

Remember, the PCV valve is a check valve to prevent boost from going into your valve cover, and it's damn near directly attached to your valve cover, so if you didn't pull the fitting out of the valve cover, you have it in the wrong spot.

 

They are after the PCV valve. I know the correct way to do it was the filter/can BEFORE the PCV valve to prevent pressure, as you stated but I just wanted to see if they worked. And it seems as if they do.

Since the PCV valve has threads on one side, would it still work if I just put rubber vaccum line on both ends and just ziptied it in? Or does it NEED to be thread in?

 

what is the vacuum on the intake side please? I bet it won't be enough to pull anything unless your air cleaner is clogged pretty good.

I guess it all depends on your definition of "fighting".

 

That wasn't my point, really. My point is simply that there IS vacuum there, and it can be used as a source. Whether it is enough to actually work, well, thats the real question. I don't know how much is there because I have never measured it.
(Not trying to argue or anything...)

 

actually that isnt true...

the small ports on each intake manifold runner WILL pull vacuum actually

if youve ever seen the crankcase evacuation systems that drag racers use, they basically weld a small tube at a backwards sweeping motion onto the exhaust, and the exhaust passing by this port will create a suction from that tube due to the gases passing by it

the manifold works in much of the same way, with the air passing by the small ports and going into the head, it actually creates a suction which is the vacuum that pulls the gas through the pcv

ill put the mercury sticks on it tomorrow and check out the actual in/Hg that its pulling

 

I'm sure there is some venturi effect in play but what's going on on the other end of the system far outweighs anything near the air cleaner. But let us know what you find please.

 

will do

ill check before and after the turbo to see the variance as well

might even throw it on the dyno to do some pulls and see what the difference is

im sure at some point there is some positive pressure in that line, thats why the valve is there....but at idle and for the most part it should be pulling vacuum

 

If you are talking about the PCV "line" that runs across the top of the intake runners on the intake manifold, you will see whatever the car is running at idle, and boost wise. I know this because each of the little bosses on top of the runners that have BB's pressed into them to block the port off, well, I drilled every one of those out and drilled/tapped each of those bosses for a 1/8"NPT port to run a sneaky 50 shot of the juicy. Hence the reason why I researched the PCV system soo much. Each of those little bosses, when the BB is drilled out and the boss drilled / tapped makes a great spot to run a direct port juicy set-up. (Sneaky too)

When you look down inside the runner, it's all open to each of the cylinder runners. So, your PCV system, up to the PCV check valve, see's whatever boost/vacuum the motor is running at.

I think the nipple that is post MAF, but pre-turbo is the one that I (Possibly We?) are the most interested in to see how much vacuum is there, and if it can be used with the PCV system disconnected to use/power a catch can properly.

 

well of course it has enough vacuum to properly work a catch can.... with the turbo behind it, essentially "pulling" air in once it has spooled will certainly pull enough vacuum....i had a catch can that worked very well on a naturally aspirated honda, that was setup exactly like the evo setup, except there was no turbo after the nipple

 

So we get no numbers then?

 

sorry, not yet...been busy trying to get a few cars ready for this weekends track events...ill try and get some next week

 

now?

 

Was running a RRE vented can with both PCV and intake hoses running to it. Boost gauge hooked to ITM nipple and intake nipple capped. Drained weekly and it was catching a yellowish oil/water substance. Read it was not good to be completly vented so I reconnected the PCV to ITM and left intake hose to can and intake capped, now nothing comes out when drained. Just installed a glass filter on the PCV hose, with the PCV valve on the outletside of the filter so pressurizing it shouldn't be an issue. Its universal with 3 sets of fittings, the PCV screwed right into the out-let side of the filter, used two of the fittings to connect the hose from the valve cover elbow to the filter inlet side (the fittings are plastic some i'm not to sure about them) The filter inside can be replaced. Wanted to go with the DC3 can, does anyone have one set up with the PCV on the outlet side, and if so how?Also wanted to show pics. but when I try to upload it says I can only upload 100 kb files, mine are larger how do I upoad them?

 

Here's a good link to read, routing all your lines to 1 can defeats the purpose.

https://www.evolutionm.net/forums/sh...d.php?t=200793

 

are we there yet?