Just wondering if there is a more effecient way to run my car. I have a skunk 2 manifold with the pcv delete on it and some people are telling me that might cause problems down the road. Just wondering. Thanks.

 

Your PCV system is a very crucial part of your engines ability to breathe.

First of all, the PCV accounts for 40% or more of the air required at idle.

If you simply "delete" this, blowby vapors will run through the crankcase unscavenged, destroying your oil, and creating pressure in the crankcase. The purpose of the PCV is to allow the engine to suck the blowby out of your block, and into the intake so it can be burned, and the line that runs to your valve cover allows fresh air to occupy the space of the former blowby gasses.

Not to mention your idle will be opressively low, because the IACV does not have the range to adjust for a huge air loss like that, also the reason they have an idle bleed screw.

Run your PCV, you oil pan, valve cover, spark plug, cam, and crank seals will love you for it when they don't have pressure forcing them to leak.

 

couldnt have said it better

 

Wow. Great work! Thanks for your insight. I'll look into that this weekend.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by slowcivic2k &raquo;</TD></TR><TR><TD CLASS="quote">Your PCV system is a very crucial part of your engines ability to breathe.

First of all, the PCV accounts for 40% or more of the air required at idle.

If you simply "delete" this, blowby vapors will run through the crankcase unscavenged, destroying your oil, and creating pressure in the crankcase. The purpose of the PCV is to allow the engine to suck the blowby out of your block, and into the intake so it can be burned, and the line that runs to your valve cover allows fresh air to occupy the space of the former blowby gasses.

Not to mention your idle will be opressively low, because the IACV does not have the range to adjust for a huge air loss like that, also the reason they have an idle bleed screw.

Run your PCV, you oil pan, valve cover, spark plug, cam, and crank seals will love you for it when they don't have pressure forcing them to leak.</TD></TR></TABLE>

to contradict that, if the air in your engine bay is lower pressure than the crank, the vapors will beable to excape just fine, its starting and stoping the engine that allows the vapors to turn into liquid and then mix with the oil.

From what Ive been talking to people about was the modern day ring lands, and anti-foaming oil addatives are pretty advanced and efficient enough to fight the effects of an open PCV system. I've been researching this since 02, and found myself that the PCV system has so many flaws IMO that I just ripped mine out, and have it venting to the lower pressure engine bay.

Reason my PCV system didnt do jack was the black box was not sealing, so the air I was sucking in from my PCV valve, was ambient air from the bay, not vapors. You can check this by looking around the grommet.

Plus the amount of air displaced is offset by that tiny little valve, which flows almost none. So high RPMs you have a huge barrier. Take the valve off and blow in it, restriction..... this is IMO, I think as long as you change your oil every 3.5k-5k miles and its vented enough, you should be fine.

 

Your an idiot, the PCV system is there because the piston displaces a similar amount of air in the crankcase as it does in the engine, because it strokes, it will be able to get out just fine if you want random block seals to start leaking. Auto manufacturers don't put PCV systems on a car for no reason, look at older cars that have road draft tubes (stoneage crank vent) and how the oil pan and crank seals always leak.

8000rpm is a lot of air going into the engine, as is a lot of air being displaced in the crankcase, and it has to go somewhere, and the seals are not an exit.

Its not a restriction, its a vacuum source (manifold) sucking pressurized crank air into it, by creating this pressure differential you take the crank pressure off the piston as it moves downward by the sucking force of the piston caused by downward movement when the intake valves are open. This also prevents blowby gasses from soaking into the oil because the piston is sucking them out, by way of the PCV valve.

Since 2002? wow, it taken you a long time to understand how a PCV valve works, the simplest thing on a car today besides an air filter...

 

And for the California crowd... It also prevents the oil vapors from entering the atmosphere. Which is the real reason all cars in the US have had them since the 60's.

The vapors are being sucked into the IM to be burned. That is it.

Now a stuck PCV valve would let the crankcase pressure to build enough to blow out the seals. That is if there is no other place for the pressure to go.

 

For you.