Pcv

Gene1949

Gene1949

Well-known member
I tig welded a 45-degree offset because the auto manufacturers designed grommets to set their PCV valve in the vertical for a reason. Others here have theirs laying @ 45 degrees in the road tube bore.
The Edmonds intake is a true dual plane. I tried using the existing port (on the side) as the vacuum source but could not get a consistent idle. The block is made from ¾” aluminum with 2 ports. Both ports “split” the bores under each butterfly providing sourcing from each side of the motor. Rear (under secondaries) is for PCV and front (under primaries) is for vacuum advance.

Parts

1¼” exhaust tubing mitered 45*
V-188 PCV value (Standard ignition product)
Rodney Racer [Mr Gasket] grommet #6376 trimmed to fit.


Cooling
Late 90s Taurus SVO shroud and 2 speed fans. Practically a bolt in with 80s-90s Volvo relay/circuit breaker package and high/low temperature switches in bottom tank


Please enjoy and I hope some food for thought. I think I improved the cooling and throttle response. This car gets driven a lot on road trips. It sits for a month or 2 at a time but when the urge strikes pack a bag and hit the road. I got tired of chasing [almost] nonexistent ignition and fuel parts of questionable reliability. Same with the cooling. IF I ever broke down, the car had to be able to be fixed on the road with parts sourced from NAPA or the like.

 

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Cut the original draft tube to get a 45 deg. angle over 10 years ago to come up with this combination of components.
picture.php
 
Thankx. Thought about cutting mine too but someday somebody might need that part. Free to a good home.
 
Thanks for posting Gene1949. Always nice to see different solutions and ways of doing things.
 
8BA Engine.
So have the PCV fitted at front of inlet manifold adjacent to Oil Filler.
But I have then just run a 3/8 hose down front side of engine?
Should this be plumbed back into inlet manifold? below carb?
Phil NZ
 
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Phil Gillespie said:
8BA Engine.
So have the PCV fitted at front of inlet manifold adjacent to Oil Filler.
But I have then just run a 3/8 hose down front side of engine?
Should this be plumbed back into inlet manifold? below carb?
Phil NZ
Click to expand...
Yes, into a vacuum source from the intake manifold.
 
ok thanks for that.
But the road draft tube just went down the side of the engine.
The set up I fitted with PCV valve is located where original road draft was.
What is the purpose of now returning back into inlet manifold?
Thanks
Phil NZ
 
Phil Gillespie said:
ok thanks for that.
But the road draft tube just went down the side of the engine.
The set up I fitted with PCV valve is located where original road draft was.
What is the purpose of now returning back into inlet manifold?
Thanks
Phil NZ
Click to expand...


Instead of going off into the atmosphere, it is now re-routed back into all eight combustion chambers to be mixed & RE-burned, hopefully MORE-thoroughly, hence.....reducing pollution. DD
 
V8COOPMAN said:
Instead of going off into the atmosphere, it is now re-routed back into all eight combustion chambers to be mixed & RE-burned, hopefully MORE-thoroughly, hence.....reducing pollution. DD
Click to expand...

Ah Clean Green got it. Our lot here are really pushing for EV's so maybe this wont be a problem. lol.
Phil NZ
 
Phil Gillespie said:
ok thanks for that.
But the road draft tube just went down the side of the engine.
The set up I fitted with PCV valve is located where original road draft was.
What is the purpose of now returning back into inlet manifold?
Thanks
Phil NZ
Click to expand...

Hi Phil.. By plumbing the tube back to the intake vacuum source you create a negative pressure in the crank case that scavengers all the blowby and moisture muck. Also it helps the pistons slide down the bores because of reduced pressure behind the pistons. Also it should reduce any oil leaks out the front and rear seals, again because or the lack of crank case pressure. It might even stop it smoking when you gun it after sitting at the lights idling by pulling back oil from the intake valve guides.
Just my opinion.
 
Cleaning the air a bit is always a good option. My reason is the Mojave Desert (northwest of Las Vegas) is a bit dusty and I wanted to seal the engine off as much as possible.
Eventually the car will be given to my daughter and it needs to be as bullet proofed as possible (her and her husband are mechanical zeroes). LOF once a year and no fuel or ignition problems for many years is what I'm striving for. In Oregone it's pretty damp and sealing the motor will eliminate some of the internal moisture I experienced up there even though I run 180* Tstats
Looking back I should have probably run 190s
 
Fatheads4ever said:
Also it helps the pistons slide down the bores because of reduced pressure behind the pistons. Also it should reduce any oil leaks out the front and rear seals, again because or the lack of crank case pressure.
Click to expand...


Yes, one of the benefits of PCV Valve is that it reduces/relieves crankcase pressure.

BUT....I kind'a doubt that it will "help the pistons slide down the bores", as whichever ones are sliding DOWN, there will be an equal number 'sliding' back UP their respective bores, causing a 'cancelling-out' effect in total. That's just how physics works. DD
 
8BA Engine. Removed fuel pipe stand drilled and tapped for 1/4" bsp and ran hose from PCV valve at front of manifold into here. So I have it corrrect now, interested to see how it performs.
Phil NZ
 
Phil Gillespie said:
Tapped it just above the horizontal flange where fuel pump stand connects to inlet manifold.
Phil NZ
Click to expand...
Suspect that you don't have a vacuum source.
There is not a vacuum source in that area.
You could 'T' into the wiper connection.
466114
 

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