I gotta question about these "intake breathers"-"valve cover breathers"-can they fit on a regular tpi-look at the pic. for what I'm trying to say
and do they produce any hp improvement?
thanks for any info!!!

 

It might but why get rid of pvc (i think its called) pvc pulls out crankcase pressure so you dont blow seals. If you got a big cam though not much vacum so it would be alright.
my 2 cents
TPIGUy

 

Without PCV my motor made it 10,000 miles before oil squirted out of every single gasket. You could probably replace the breather on the passenger valve cover, but don't replace the PCV valve.

 

Im assuming you found that breather in jegs or summit, they also have breathers that have a pcv built in if you really want the looks of the breather and need to keep the pcv for functionality.

 

ok, so it looks like its a maybe-
thanks for the responses guys; Jim85IROC- let me just understand, you say not to replace the one on the side I'm showing, but the passenger side, correct?
and if I do it I'll need 2 of them right? one for each side of where the original hose went-

another thing-are these better for the car or what, any improvements hp-wise or what???
once again, thanks guys!!!!

 

Jim is correct. On mine I left the PCV alone on the drivers side and removed the pass side hose and elbow and put a breather in its place. Then I capped off the nipple on the TB where the hose used to connect. I've ran mine like this for awhile with no problems. I don't think you'll gain hp but you will get a lot less oily residue buildup in the plenum.

 

There would be no HP gain. Try to keep all the hose plumbing
the way is it.

 

IROCZZ3-you mean something like this . . .
(I'm using someones pic. from here-don't know who but thanks!)

 

Here's how mines setup...

 

For those of you with a breather on one side and the PCV valve on the other, do you have any idle/drivability problems? Doing that effectively creates a vacuum leak and lets unmeasured air into the engine downstream of the MAF. Mine is set up the same way and I'm wondering if I should go back to "feeding" the breather from the throttle body.

 

I didn't notice any drivability problems that I can tell and it idles fine...I've had it like this for 4 years. But I haven't had a chance to do any real diagnostics to see what the MAF sees so I honestly couldn't say for sure. I thought about going back to the stock setup also but I like how the inside of the plenum and throttle body is much cleaner.

 

And you've had no problems with oil leakage from gaskets like oil pan, timing cover, valve cover, etc?

 

This doesn't create a vacuum leak at all, it's not even connected to the intake. If you pull the pcv off there will be a vacuum leak because it connects to the intake. The filter just filters the air LEAVING the engine; opening the throttle sucks air from that valve cover with the stock setup, which is why your plenum and runners are so filthy. The filter on the passenger side doesn't hurt a thing.

 

Jim
I haven't had any major oil leaks yet...the only thing I had was the valve cover grommet where my breather pushes into must have been worn out cuz I had that oily film coming from around the grommet.

 

If your pcv valve is allowing engine vacuum to pull from the crankcase, and you've got a breather on the other valve cover, then you've effectively created a vacuum leak. Why do you think GM ran a line from the throttle body instead of just popping a breather on there? It's so that only measured, meatered air gets in there and eventually into the manifold through that vacuum port. There's no question that the setup allows unmetered air into the engine (aka vacuum leak). I'm more or less wondering whether it's severe enough to create any noticable idle or drivability problems, but apparently it's not.