BrntWS6

iTrader: (7)

I did check for any obstructions and it's all clear. I've wondered why I never got a drop of oil in my CC though...thought it was just because I didn't drive it much....guess it's still been going into my intake. There's no way to adjust the check valve in the Rx CC, it's fixed. My PCV valve was replaced last year.

I ordered the Rx breather, hopefully that will fix it. Why keep the air tube with the breather? I'd think it would be best to get rid of the tube since that's where the oil is coming in at.

99Bluz28

iTrader: (35)

My understanding is that RX breather is closed most of the time until the crank pressure opens the valve in it. So under normal driving the PCV system is still a closed system and fresh filtered air is still going through the crankcase.

stanggreg90

iTrader: (19)

I just put a procharger on my 2002 ls1, and im getting blow-by in the hat on the procharger, i put a catch can on the clean side, from the passenger side valve cover to the procharger and i put a filter on top of the valve cover, is that ok or should i be ruuning it a different way? I also got a check valve but have no idea if i should still use it with this setup thanks guys.

405HP_Z06

iTrader: (11)

Can you describe the exact routing and connection points? What valve covers? Which valley?

stanggreg90

iTrader: (19)

Sorry about that, i have the stock valve covers, with a fast intake , its ls1 valley its like this picture, but i have a filter on not the oil cap, if i put the oil cap on it will get oil in the hat of the procharger, if i run the breather it doesn't, just want to make sure to run this the right way so i dont hurt the motor, if theres a better way to run it with out the breather would be nice cause the smell is pretty bad thanks.

stanggreg90

iTrader: (19)

tttttttttt

99Bluz28

iTrader: (35)

Try plumbing in the rear passenger side port also before the pcv, maybe that'll help bleed off some more pressure.

1964_442

iTrader: (5)

98 ls1 stock pcv system , cheapo catch can

routing right or wrong?

99Bluz28

iTrader: (35)

If the inlet is the center CC fitting, then it's correct.

MIGHTYMOUSE

iTrader: (59)

better than nothing

1964_442

iTrader: (5)

yes it is

youre right

VRSenator065

Hi All, I am hoping you guys can help a mate out from Down Under.

I am nearing completion of my build which is the swap over to a stock crate LSx454. I have gone for a Jenvey independent throttle body injection system.

I have drilled and tapped each runner and taken a small vacuum line from each back to a common manifold block behind the engine, this will go off to the brake vacuum booster, I also have spare ports for an oil catch can.

I have purchased a Mishimoto carbon fiber oil catch can but now reading this thread I am unsure if I have done the right thing.

There are vent tubes on each of the rocker covers. there is also a vent tube on the top of the valley cover. I assumed I would connect these three and then take them back to one tube on the top of the can, and the other on the top of the can I would take and plumb into the vacuum block.

But is this correct?

Here is a picture of the bay


These are the vacuum lines I did that go back to a common rectangular manifold.


This is the can

99Bluz28

iTrader: (35)

I'd probably run a pair of remotely located breathers off the valve covers vent tubes and then run the valley cover tube to the CC inlet then from CC outlet to the vacuum block I'd also mount the breathers(up high) and CC(high or low) somewhere up front to either the left or right of the radiator. this will allow the CC to work more efficiently, and with the breathers away from the engine there's less chance of any oil mist ending up on the engine. If you do have issues with oil venting out of the breathers then install 1 or 2 CCs w/breathers mounted on top and that should take care of it.

VRSenator065

Thanks for the reply, I am reasonably sure, due to our rather strict smog laws here, that I can't vent the breathers to atmosphere, they have to be recirculated back through the engine. perhaps I need to contact the engineer signing my car off and see what he has to say. Again thanks for the reply.

99Bluz28

iTrader: (35)

With the CC connected to the vacuum block the crankcase vapor will get pulled into the CC where most of the oil vapors will get trapped, anything that doesn't will get pulled into the combustion chambers. Further most of the time the breathers will be acting as air filters, full throttle should be the only time the breathers vent to atmosphere, and the only reason to concider a CC with a breather for the fresh air inlet.

99Bluz28

iTrader: (35)

What type of air filter assembly will you be running over the individual TBs?
You could probably connect a hose from each valve cover port into the back side of what ever type of air filter assembly you use then any vapors vented will be pulled back through the engine.

VRSenator065

Right now the plan is run with no filters, just fine mesh screens. The car although strictly streetable in reality wont see too many road miles.

That's why I was planning on taking it back to the manifold block, I thought it doesn't matter if they get fed in before the throttle bodies in the air cleaners, or just after in the vacuum tapping I have?

99Bluz28

iTrader: (35)

Like I said most of the time it's going to/should be pulling in fresh air through the valve covers, so the engine receives a constant supply of fresh air to displace the crank case vapors and blow-by that's getting pulled through the CC, then through the combustion chambers. I believe if you had it pulling vacuum out both the valley cover and valve covers it wouldn't work correctly because the vacuum would be working against itself, unless you add another filtered opening to pull fresh air from.

VRSenator065

Makes sense, thanks, I have shot off a question to my engineer, will wait to hear what he say, and will post up here what he says for reference.

rkdc5z06

here is mine. Ebay catch can with improvised bracket.