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View Full Version : Very interesting theory/fix on PCV systems



Zack
04-15-2010, 07:00 AM
With all the talk of breathers/PCV stuff, I found this (posted yesterday on MF) and found it to be quite intriguing.

http://www.modularfords.com/forums/showthread.php?t=156492

RR|Suki
04-15-2010, 07:12 AM
With all the talk of breathers/PCV stuff, I found this (posted yesterday on MF) and found it to be quite intriguing.

http://www.modularfords.com/forums/showthread.php?t=156492

Buddy of mine, Scott, who used to work at VT before it fell apart (I think you met him when you picked up that motor), has pulled the covers and redone the baffles on the cam covers so the oil thrown off the chains doesn't go up into them.

It's been working really well on that land speed car they did. I think I'll end up trying it out, I've been itching to pull my covers and paint them wrinkle black since the upper intake came out so nice, so if it happens I'll post whether or not it ends up being a waste of time.

Is it worth all the pain of pulling off the cam cover? I dunno, but it is pretty annoying to either run a PCV and have oil in the intake, or run breathers and have oil at the breathers :argue:

Motorhead350
04-15-2010, 07:29 AM
it is pretty annoying to either run a PCV and have oil in the intake

Ya it sure is!

Good find Zack. I'm glad I'm not alone on this former issue.

juno
04-15-2010, 08:55 AM
Interesting, I don't suppose it would tend to clog up any more then the PCV valve itself.
I was thinking more along the lines of extending my breathers and locating their filters next to my air intake filter to solve the fume problem.

Egon Spengler
04-15-2010, 09:04 AM
I like it! I might do this mod.

LeoVampire
04-15-2010, 09:52 AM
As long as there is enough ventalation for the crank case it might work.

I supose as long as the line dosn't colapse anywhere it would be okay.

The question is should you do it to both side's evenly seeing you will be restricting some of the ventalation flow on one side it may get more oil going into the throttle body area on the other side instead if your not running a catch can.

A pressure guage should be used before hand to see just how much outward pressure the engine is producing or venting without any vacume on it and then after the restriction checked again to make sure the internal engine presure is not building up.

FordNut
04-15-2010, 10:26 AM
Possibly it would make a difference, but I doubt that it produces more flow restriction than the PCV valve itself. For S&G, grab a pcv valve and hook it up to a hose, put it in your mouth and inhale. Do the same thing with the fitting. I suspect the internal flow restriction of the disc and small flow areas inside the PCV valve may produce even more flow restriction than the small orifice in the fitting.

Now the revised baffling inside the valve covers as suggested by RR|Suki, that's an idea that would probably really help. Maybe even adding filter material such as coarse steel wool between the internal baffle plates and the PCV grommet so the oil vapors can condense on the filter and run back down into the head...