PCV Delete?

[Moparfiend]

Still trying to increase hood clearance and running into issue after issue. I currently have a spacer so that I can have a “proper” PVC connection from the valve cover to my manifold vacuum crankcase.

If I need to cant I just vent this through a check valve to ambient atmospheric without any issues other than venting unspent hydrocarbons to the atmosphere? I need to get rid of the spacerAND I don’t want to yank out the manifold at this time to tap a port.

 

[R413]

If it’s a street driven car you need a PCV.

you can drill and tap the manifold on the car if you are careful

 

[toolmanmike]

Still trying to increase hood clearance and running into issue after issue. I currently have a spacer so that I can have a “proper” PVC connection from the valve cover to my manifold vacuum crankcase.

If I need to cant I just vent this through a check valve to ambient atmospheric without any issues other than venting unspent hydrocarbons to the atmosphere? I need to get rid of the spacerAND I don’t want to yank out the manifold at this time to tap a port.

View attachment 1496211

A Holley without a PCV port? WTF!

 

[WileE]

I'm confused. You don't have a PCV port ? what manifold is that, tarantula ?

 

[Don Frelier]

If it’s a street driven car you need a PCV.

you can drill and tap the manifold on the car if you are careful

You should be able to remove the carb, stuff the ports and drill and tap it.
Vacuum out and carefully remove the stuffing.
Good to go.

 

[Moparfiend]

A Holley without a PCV port? WTF!

A 4150 actually.

 

[Moparfiend]

I'm confused. You don't have a PCV port ? what manifold is that, tarantula ?

M1 its a race manifold. Not my choice its the way it came.

 

[Moparfiend]

You should be able to remove the carb, stuff the ports and drill and tap it.
Vacuum out and carefully remove the stuffing.
Good to go.

Hum carefully is the key word but that would save a lot of time.

 

[toolmanmike]

Hum carefully is the key word but that would save a lot of time.

A powerful shop vac and a friend to help is the key.

 

[pnora]

A 4150 actually.

Look at the back side below the bowl. There should be a PCV nipple. I do not think I have ever seen one without one.

 

[Kern Dog]

Intake removal and installation is easy. I'd rather not risk getting any shavings into any engine.
Regarding PCV, it isn't just an emission thing. Crankcase evacuation increases piston ring seal by eliminating the internal crankcase pressure. A pair of breathers helps but actual vacuum encourages the rings to stay seated and not flutter.

 

[4speed68rt]

Great thing about a 440 is that you dont have to drain the radiator to pull the intake off. Pull it, drill it, tap it, put it back on. Remove that spacer, put new gasket, straighten out your linkage situation and go for a cruise! Much better, and faster, than working around that spacer.

 

[Moparfiend]

Look at the back side below the bowl. There should be a PCV nipple. I do not think I have ever seen one without one.

Yeah I have one Nd it’s dedicated to the vacuum break booster.

 

[Moparfiend]

Great thing about a 440 is that you dont have to drain the radiator to pull the intake off. Pull it, drill it, tap it, put it back on. Remove that spacer, put new gasket, straighten out your linkage situation and go for a cruise! Much better, and faster, than working around that spacer.

I want to get rid of the spacer for sure but I need to find a vacuum alternative for the PCV.

Do you see an issue with my new linkage per say?

 

[4speed68rt]

Drill a hole in the back, or front of the intake plenum and tap it for a vacuum fitting to hook the PCV to.

 

[Moparfiend]

Looks like I can use a PCV vacuum port on the carburetor itself and get rid of the spacer AND not have to modify the intake manifold!
The strange thing is this port on the carburetor is a 1/8 nipple. I guess that should handle the low cfm requirements of a PCV?
Ive never seen a PCV line that small

 

[toolmanmike]

Yeah I have one Nd it’s dedicated to the vacuum break booster.

The brake booster gets fed from the intake. PCV from the carb.

 

[Moparfiend]

Booster get's fed from the intake. PCV from the carb.

Huh? I am confused. Aren’t both utilizing full manifold vacuum? Both ports I identified the large rear and the small 1/8 nipple appear to be full manifold vacuum right?
What are you differentiating between Intake source and carb? Aren’t they the same??

 

[Kern Dog]

In OEM applications, Toolman is right. I don't know how much of a difference that there might be between the intake port with a nipple or the one at the base of the carb. Both are getting manifold vacuum but if the OEM way was to pull brake booster vacuum from the intake port directly, I'd defer to that.

The small 1/8" nipple is inadequate for PCV and certainly for brakes. It is meant for things like vacuum advance.
OP has an LA series engine, not a 440. REgardless, intake swaps are one of the easiest things to do. The OP is certainly qualified.

 

[pnora]

Drill the intake for the brake booster and use the correct fitting on the carb which was intended for the PCV.