What a bad PCV does to your car
06-23-2002, 11:25 AM
#1
What a bad PCV does to your car Well, I finally got around to installing my industrial air/oil separator into my car. Needless to say, it works flawlessly, but it has shown me something quite discouraging.
The catch basin on the separator holds about 1/2 a pint (1/2 a glass of beer <img border="0" alt="[chug]" title="" src="graemlins/gr_chug.gif" /> ). It is pretty darn big.
10 minutes of heavy driving (lots of sustained high RPMs) completely filled this 1/2 basin FULL of oil, to the top. Just to give some of you an idea how much oil is being sucked through the PCV system. I couldn't believe it. I always knew that my intake had oil in it, but I could never really quantify how much was being used.
Obviously, a good air/oil separator system is not the answer. I will be pulling my valve covers and looking into installing some form of baffle at the PCV entry point.
It is pretty obvious now, that the inline filters, catchcans and stuff are just a band-aid. If you actually install something that stops ALL the oil, there is just too much oil to deal with for heavy driving.
I will posts pics of my industrial beast as soon as I can.
The catch basin on the separator holds about 1/2 a pint (1/2 a glass of beer <img border="0" alt="[chug]" title="" src="graemlins/gr_chug.gif" /> ). It is pretty darn big.
10 minutes of heavy driving (lots of sustained high RPMs) completely filled this 1/2 basin FULL of oil, to the top. Just to give some of you an idea how much oil is being sucked through the PCV system. I couldn't believe it. I always knew that my intake had oil in it, but I could never really quantify how much was being used.
Obviously, a good air/oil separator system is not the answer. I will be pulling my valve covers and looking into installing some form of baffle at the PCV entry point.
It is pretty obvious now, that the inline filters, catchcans and stuff are just a band-aid. If you actually install something that stops ALL the oil, there is just too much oil to deal with for heavy driving.
I will posts pics of my industrial beast as soon as I can.
06-23-2002, 01:34 PM
#3
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Re: What a bad PCV does to your car </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by kewlbrz:
<strong>Who is venting the crankcase to air as opposed to a suction line? Good or Bad idea?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Dude were talkin about this on another thread
https://ls1tech.com/ubb/cgi-bin/ulti...;f=24;t=001811
<strong>Who is venting the crankcase to air as opposed to a suction line? Good or Bad idea?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Dude were talkin about this on another thread
https://ls1tech.com/ubb/cgi-bin/ulti...;f=24;t=001811
06-23-2002, 01:39 PM
#4
TECH Fanatic
Re: What a bad PCV does to your car Would def like to see pics. FWIW, your car seems to consume more PCV oil than mine. Even my compressor filter has substantially less than yours did.
You should be able to define overall oil consumption as to the Maximum the PCV system could consume, not counting blow-by. I'm not burning that much oil.
Hmm...
Maybe you need a new PCV? Is yours a hollow one? Also, check to see if your Fresh Air Intake is blocked or clogged.
FWIW, I think the LS1 PCV problem is Excessive Crankcase Vacuum created by too much vacuum under WOT, sucking the oil out. PCV line/tubing restrictions may help also. Maybe stick a vacu-tite 3/8" -> 1/8" -> 3/8" restrictor in there. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
<small>[ June 23, 2002, 01:54 PM: Message edited by: MelloYellow ]</small>
You should be able to define overall oil consumption as to the Maximum the PCV system could consume, not counting blow-by. I'm not burning that much oil.
Hmm...
Maybe you need a new PCV? Is yours a hollow one? Also, check to see if your Fresh Air Intake is blocked or clogged.
FWIW, I think the LS1 PCV problem is Excessive Crankcase Vacuum created by too much vacuum under WOT, sucking the oil out. PCV line/tubing restrictions may help also. Maybe stick a vacu-tite 3/8" -> 1/8" -> 3/8" restrictor in there. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
<small>[ June 23, 2002, 01:54 PM: Message edited by: MelloYellow ]</small>
06-23-2002, 01:44 PM
#5
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Re: What a bad PCV does to your car Your vavle covers already have a baffle where the PCV system joins in. If you find a better solution, be sure to let us know.
06-23-2002, 03:42 PM
#6
Re: What a bad PCV does to your car I just put a 2 mm orafice in the PCV line to perhaps cut down on the suction that it is drawing.
I'm not running a PCV valve anymore. Mine leaked like a bastard. I am running a check valve at my separator instead.
As for the baffles in the valvecover..... the current ones do nothing. I would like to try extending the suction area at the valve cover.
If this doesn't work, then I give up and will just run breathers. Not like there's any emmissions stuff left on my car anyways.
I'm not running a PCV valve anymore. Mine leaked like a bastard. I am running a check valve at my separator instead.
As for the baffles in the valvecover..... the current ones do nothing. I would like to try extending the suction area at the valve cover.
If this doesn't work, then I give up and will just run breathers. Not like there's any emmissions stuff left on my car anyways.
