Do you have regular valve breather or a breater tank or something else?

For those with breathers:
How much boost are you running?
Does it leak oil over the valve covers?

Ordering stuff for my new engine now, aiming for 12psi......

/N.

 

I have a PVC on one side breather on the other 9lbs boost no leakage any where

 

Dont know how well you can see it in the picture but I have two breather filters, one on each valve cover. My PCV goes in the intake, though I dont run a PCV valve I have an ATR PCV replacement(that positivly seals under boost and doesnt let boost escape into the crankcase).

27psi is the most I've run, usually more like 25 and no real oil leakage to speak of. The filters do get a little oil on the inside but it doesnt drip out.

HTH,
Steve

 

Where do I find a ATR PCV valve?

/N.

 

check this post for the drawing and my posts in it. It is a fine solution to your problem.

https://www.thirdgen.org/techbb2/sho...highlight=vent

 

Ok...

Just orderad a breather tank..

According to the drawing the PCV valve will shut under boost right? and the pressure will go where?

 

picture of the skiss

 

what is a skiss?

 

sorry mixed in some swedish......drawing in the correct word

 

ok, the only pressure seen by this system will be under full boost and it actually isnt a whole lot, just enough to make a mess on your valve cover that dribbles onto the header and makes embarassing smoke and makes the tech officials mad because they think you are (and actually you are just a bit) soiling the track with oil. Anyways this "back pressure" or "crankcase" pressure under full boost is going to escape one way or the other. All we have done in this drawing is given it a more controlled place to go where the oil and hopefully the oil mist can be contained in the catch can with the "pressure" still venting to atmosphere. This is not something that could be done at the valve cover itself because of the "frothing" nature of the inside of the valve cover is actually part of the problem. Sure valve cover baffles address this and I think they should still be used if you have them. That will be like double insurance. The idea of the catch can is to divorce the "baffle" from the valve cover and give it more area to work in, in essence a huge baffle thats all.

 

ATR's website is www.atrperformance.com, though they dont have it on their website it is in all their catalogs. The reason alot of us(turbobuicks)run them is that a stock pcv was never intended to completely seal under boost, and in higher boost situations, or when a pcv valve decays we've had problems with oil leaks(such as from the front and rear main seals). Others who dont use the replacement valve have installed check valves before the pcv valve to stop pressure from escaping.

I do like the catch can idea and want to run one eventually, just never got around to it. It should work with the atr valve so long as it's completely sealed and the pressure(under boost)will be contained in the intake and catch can, where it should be, as it's stopped from entering the crankcase by the valve.

HTH,
Steve