Alright, I know this has been covered before, but the search feature blocks out words 3 letters or under I think so I cant use it. Is there anything wrong with tapping into one of the intake runners for the PCV valve? I keep thinking that its so little it shouldnt make a difference, but will it? Only reason I ask is because Im running out of vacuum ports fast. Maybe I should just try to find a carb spacer with a port on it.
you need to tap into the valley not the intake runner, you need to get the blow bye g***es not the air/fuel mixture.
I think he's still got the pcv in a valve cover, but wants to get vacuum from a manifold runner and for crankcase stuff to be ****ed into that runner.
I wouldn't. Unlike the vacuum advance, a PCV moves air. (or is supposed to). If you tap into a single cylinder runner, you will lean out that cylinder. I had to adjust the idle mixture screws to account for the controlled vacuum leak when I added mine. You want the vacuum source to be as close to the carb base as possible so that the mixture screws can restore the air/fuel ratio in the plenum before it gets to any of the cylinders.
Tommy covered this topic very well some time back. Try a search adding a few other words, e.g. crankcase, intake, vacuum. It was a good thread Pete
Anything wrong with running a PCV setup into the aircleaner? Ive seen a lot dont that way so Id ***ume it works. How much vacuum is needed?
I'm going thru this right now and my question is when you put a PCV in the intake manifold directly into the valley do I have to worry about oil getting ****ed in the PCV.
if you're talking about a 70's-era car with a closed pcv system, the line running to the air cleaner is NOT connected to the pcv valve. the line connects to the breather and allows it to source fresh air from the air cleaner. the flip side is that when the breather is "exhaling" crankcase gases, they're ****ed down into the carb and not let free to pollute the atmosphere. it was an emissions thing. hope this helps, ed
Don't put it in a runner, put it in the crankcase valley. Read this tech: http://www.jalopyjournal.com/forum/showthread.php?t=64338
I was running pcv's into an edelbrock carb on a built 351W and everytime I jumped in it hard it'd **** oil through the pcv's into the intake. A lot of oil.
Then it's not set up right. Some think that a PCV is an emissions part. A PCV is not an emissions part, it was developed as a performance enhancement, so eliminating it doesn't allow you to realize any improvement in performance. You need to find a place to mount it where it can **** crankcase g***es out of the engine, and you should have a breather somewhere on the engine as well. Also, make sure you have your PCV connected to the proper vaccuum port.
Don't remember if I was running a breather or not, know it was hooked up to the PCV port on the carb and that I switched out to breathers. That's been something like 15 yrs ago (first car I built)
Yeah, I think Im just going to go with the valve cover - air cleaner thing. My valve covers are baffled so I dont think it should be a problem, and I can install a breather on the other valve cover to pull in fresh air. Time to pick up some rattle cans to make them look half way decent since theyll be staying till my budget expands.
if your going to run a pcv in a plce that it was not meant for you need to make a baffle to block any oil from entering the valve.......but not to hinder the gas flow. when i was in high school i had a car with tall chrome valve covers with no baffle, it ****ed in oil and leaked around the grommet, someone made a kit (basicly a plate you bolted to the inside of the v/c) after the baffle no more leaking grommets and no oil ****ing.
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