I'm beginning to thing theses ringland things are a myth, and do not really exist.
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I'm beginning to thing theses ringland things are a myth, and do not really exist.
They exist.. remember this is how my broken ringlands came to be!!!
Mr2, Maybe this will help. All late model motors have a PCV valve. The idea is to burn off the internal engine (crank case) vapors that used to just be dumped to atmosphere. So a vacuum line runs from the intake to pull these vapors in and burn them under normal driving conditions.
If we are pulling these vapors in, we need to replace the vapoers with fresh clean air. On our cars this air comes from the air intake as it has a chance to get filtered first so we are not pulling in dirty air. The filtered air come in at the rear valve cover replacing the dirty vapors (blow by). But, at higher RPMs, the PVC valve can in now way keep up with the shear valume of blow by that we produce. So tn begins to over run the PVC and begines backing up and going out where the fresh air was coming in through the rear valve cover and that excess will be taken in and burned through the throttle body. This back up is oil laden and this is the oil we wish to try and catch before entring the throttle and intake gumming up the works. 1 Catch can should be all you need. If you find you are still haing issues with tons of oil in your intake, you can fill the catch can with an eliment like Scotch brite or some other plactic wool and this will help trap more oil from the blowby and keep it in the can. The Catchcan should be place in a cool area as well. This help condence the oil out of the blowby to trap more oil. For My sent up I don't want any of this blowby to be pulled in to the intake at all. So My catch can uses a vary small 1.5 in diam K&N still filter on it rather than retuning the the throttle intake tube. This little filter will filter the air as need to supply fresh air the rear valve cover under low load contions and than allow to dump the filtered blowby to atmosphere under high load. Keep you catch can as low as you can if you are plumbing it back to the intake. This will help to keep from pulling in the oil you filtered out. Sorry for the lengthy drown out explenation. But this may help others to understand just what is going on and why do some of the mods we do. Others just tend to bolt things on because others say to and really don't understand why. They just do it because they wish to keep up with the Jones. LOL. If you are a NORMAL kind of driver and not beating the living daylights out of your car as I do. All this is not nessesary at all and is a waist of money.
Just a note. Ring lands brake do to poor ring gap.
Blowby vapors make it to the top of the valve cover through the oil drain back holes. That's how the oil get back in the pan. Very simple.
A couple issues with that.Quote:
Originally Posted by steve68
Number 1: there's no vacuum on that side of the system if it's just venting. The vapors aren't being "sucked" into anything, they're just being slowly pushed out.
Number 2: That's a small vacuum leak and cruise and idle, and although it's small, it has proven to screw peoples tunes up.
Is it really necessary to have a pcv in both valve covers when thier eqalizedon the other side of the valve covers anyone see a problem with me removing and pluging the turbo intake pcv and just use the front valve cover pcv and adding a catch can before it enters the lower plenum. Atleast i could keep the oil and other gasses out of my turbos and intercoolers all together. Intercoolers are small enough without adding a quart of oil to them yearly. All this oil makes me want to jerk this engine and rebuild, someone talk me out of it i really dont think its absolutly necessary to rebuild but all that oil amd carbon makes me antsy for a rebuild and then the kids dont get new shoes cuz i went and bought forged pistons because later i might want to put some turbos that will suck my neibors stupid little dog right out of thier back yard. Sorry for the rant
Thanks
been running with them all open for years on all kinds of cars. If it really blows that much oil out you need a catch can there's serious issues. worst case run a hose from the ports to the bottom of the bay and let it blow out there.Quote:
Originally Posted by kneowe
^ If its a dedicated track car then there is no problem with that when oil is changed at appropriate intervals. But for those of us DD's that need to pass emissions and want our dollars to stretch as far as possible, then an open pcv system is unacceptable. Unfiltered air entering into the system contaminates oil and dumping blow-by into the atmosphere is just silly.
^^ Don't rebuild your motor because of oil in your intake. If you are worried about your motor that much there are a couple things you can do: PAO/ester oils act like a detergent and gently clean excess sludge in the crank case and likely oil control rings as well. Seafoam treatments to the intake will clean off excess carbon on the valves, pistons, etc. Just keep in mind that the carbon buildup could be the junk that is sealing up your high mileage motors. I wouldn't be surprised if you lost some compression by cleaning off the carbon.
IMO baffled and filtered catch cans should come stock on boosted applications because blow-by effects octane.