PCV valve hose goes???

[koosh]

On a 68 440, pass side valve cover in rear has provisions for a PCV valve. Problem is, with EFI, power brakes, and vacuum headlights, where do i go with this PCV valve hose?
Do i even need a PCV valve? Is anyone running a oil catch can for the PCV?

 

[threewood]

Yes you need it. But....with an EFI you should run a fixed orifice (basically a gutted pcv filled with epoxy and drilled to a specific size.) Reason being if the pcv fails open, efi will correct the a/f imballance with more fuel = engine revs.

Can you Tee in the hose to an existing line or is the an extra port on your manifold which may currently have a plug in it?

 

[R413]

How do they run a real PCV on millions of factory built EFI cars?

 

[koosh]

Yes you need it. But....with an EFI you should run a fixed orifice (basically a gutted pcv filled with epoxy and drilled to a specific size.) Reason being if the pcv fails open, efi will correct the a/f imballance with more fuel = engine revs.

Can you Tee in the hose to an existing line or is the an extra port on your manifold which may currently have a plug in it?

I gotta tell ya….. you thoroughly lost me at:
“with an EFI you should run a fixed orifice (basically a gutted pcv filled with epoxy and drilled to a specific size.) Reason being if the pcv fails open, efi will correct the a/f imballance with more fuel = engine revs.”
Ive not run this motor yet (only on test stand with carburetor)
Was not sure to run a hose to throttle body base, or the intake somewhere if i can find a port on this Edelbroch Torker 440

 

[RR Fan Dan]

somewhere if i can find a port on this Edelbroch Torker 440

There is one intake on the Torker. Base of carburetor firewall side.

 

[koosh]

There is one intake on the Torker. Base of carburetor firewall side.

Are you speaking of these?

 

[RR Fan Dan]

Are you speaking of these?View attachment 1841017

No.

 

[koosh]

No.

View attachment 1841019

I don’t have that model 440 intake, but there is a port where you circled, but brake booster is there

 

[RR Fan Dan]

 

[RJRENTON]

Are you speaking of these?View attachment 1841017

This is where the EGR (Exhaust Gas Regulator valve is mounted).....and connects the Xover passage to manifold vacuum via a diaphragm controlled device......IMO....LEAVE AS IS...HOLES PLUGGED.....
BOB RENTON

 

[koosh]

View attachment 1841029

I currently have 3 hoses hooked up to that 1 rear manifold port, no room for PVC…..

 

[BLK 68 R/T]

Just run a breather on the valve cover and don’t worry about a pcv valve. You don’t need it.

 

[koosh]

Dont need a PCV??
That was my first thought. But hoped others would explain why i dont need

 

[RR Fan Dan]

Do you have a vacuum port on your carb? Mine does. That’s where I run my PCV. I believe you do need PCV, but I’ll let others chime in.

 

[Unkle Krusty]

On my old bike, I run a tube out of sight and plug in a PCV valve looking thing in the end. It drips about three drops of oil per winter. The hose used to go to the air box, but that got modified. If it is old British, and pukes a lot of smoke, the hose exits out the back. That way her lady ship does not choke. These are crank case or sump / pan vents.
I have no idea where any of this stuff goes with EFI. I suppose I could look. But it is V6 Chev and Suzuki motorcycle.

 

[RJRENTON]

Just run a breather on the valve cover and don’t worry about a pcv valve. You don’t need it.

100% WRONG ANSWER....the carb is calibrated to have PCV introduced into the idle mixture below the throttle plates to smooth out and dilute the mixture. An added benefit is PCV helps to remove condensate as moisture from the engine internals and to assist in removing blow-by products and keeps the oil cleaner. Just about ever vehicle made from mid 1960's is equipped with PCV system. What don't you understand about the PVCs function??? The carb has a PCV CONNECTION on its base flange....the FSM shows how it works and identifies it's function.......
BOB RENTON

 

[koosh]

Interesting…. An engine builder friend indicated the PCV should be connected to manifold vacuum and not carburetor?
I believe there’s a plug on the throttle body front base….

 

[RemCharger]

You have efi correct? Yes usually there are some plugged ports in the base

 

[koosh]

You have efi correct? Yes usually there are some plugged ports in the base

There are some front and rear, but i get conflicting answers…. Use carb vacuum, use manifold vacuum….

 

[RR Fan Dan]

I believe there’s a plug on the throttle body front base

Run it there. Use carb vacuum.