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The Ford Barn (https://www.fordbarn.com/forum/index.php)

- Early V8 (1932-53) (https://www.fordbarn.com/forum/forumdisplay.php?f=4)

- - Pcv (https://www.fordbarn.com/forum/showthread.php?t=300026)

Gene1949

06-18-2021 07:53 AM

Pcv

2 Attachment(s)

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.

51 MERC-CT

06-18-2021 08:31 AM

Re: Pcv

Cut the original draft tube to get a 45 deg. angle over 10 years ago to come up with this combination of components.
https://www.fordbarn.com/forum/pictu...ictureid=42093

Gene1949

06-18-2021 11:42 AM

Re: Pcv

Thankx. Thought about cutting mine too but someday somebody might need that part. Free to a good home.

Will D

06-18-2021 01:31 PM

Re: Pcv

Thanks for posting Gene1949. Always nice to see different solutions and ways of doing things.

Phil Gillespie

06-18-2021 01:43 PM

Re: Pcv

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

51 MERC-CT

06-18-2021 02:07 PM

Re: Pcv

Quote:

Originally Posted by Phil Gillespie (Post 2027816)

Yes, into a vacuum source from the intake manifold.

Phil Gillespie

06-18-2021 04:25 PM

Re: Pcv

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

V8COOPMAN

06-18-2021 04:53 PM

Re: Pcv

Quote:

Originally Posted by Phil Gillespie (Post 2027869)

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

Phil Gillespie

06-18-2021 05:20 PM

Re: Pcv

Quote:

Originally Posted by V8COOPMAN (Post 2027881)

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

Ah Clean Green got it. Our lot here are really pushing for EV's so maybe this wont be a problem. lol.
Phil NZ

Fatheads4ever

06-18-2021 07:46 PM

Re: Pcv

Quote:

Originally Posted by Phil Gillespie (Post 2027869)

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.

Gene1949

06-18-2021 08:00 PM

Re: Pcv

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

V8COOPMAN

06-18-2021 08:08 PM

Re: Pcv

Quote:

Originally Posted by Fatheads4ever (Post 2027924)

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.

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

Phil Gillespie

06-21-2021 12:01 AM

Re: Pcv

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

bigd1101

06-21-2021 04:26 AM

Re: Pcv

What do you do with the old vent tube when you set this new vent system up?

51 MERC-CT

06-21-2021 04:36 AM

Re: Pcv

Quote:

Originally Posted by Phil Gillespie (Post 2028570)

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

Where exactly did you tap the hole?

51 MERC-CT

06-21-2021 04:41 AM

Re: Pcv

Quote:

Originally Posted by bigd1101 (Post 2028585)

What do you do with the old vent tube when you set this new vent system up?

You remove it and it's components and do whatever you want with it.
Save it and watch it get old and rusty or chuck it.

Phil Gillespie

06-21-2021 05:18 AM

Re: Pcv

Quote:

Originally Posted by 51 MERC-CT (Post 2028586)

Where exactly did you tap the hole?

Tapped it just above the horizontal flange where fuel pump stand connects to inlet manifold.
Phil NZ

bigd1101

06-21-2021 05:37 AM

Re: Pcv

Quote:

Originally Posted by 51 MERC-CT (Post 2028587)

You remove it and it's components and do whatever you want with it.
Save it and watch it get old and rusty or chuck it.

And the hole it went into? Plug it with something?

51 MERC-CT

06-21-2021 05:43 AM

Re: Pcv

Quote:

Originally Posted by bigd1101 (Post 2028592)

And the hole it went into? Plug it with something?

The hole it went into on the manifold is where the PCV valve goes.

51 MERC-CT

06-21-2021 06:09 AM

Re: Pcv

1 Attachment(s)

Quote:

Originally Posted by Phil Gillespie (Post 2028589)

Tapped it just above the horizontal flange where fuel pump stand connects to inlet manifold.
Phil NZ

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.
https://www.fordbarn.com/forum/attac...4&d=1624273710

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