Smilie 388

How rare is this intake and is it worth using or selling it ? The 64 vert I'm working on has a late (68) 327 in it and they drilled a hole in the side of the valve cover for the PCV valve . There's no baffle on it so it looks like it's sucking up a bunch of oil . I was going to drill the back of the intake (there's no coil mount bosses) for a screw in PCV but if this manifold is worth something I don't want to ruin it . Then I just have to get the hole in the valve cover tigged up .

jim lockwood

I'm guessing "Joehnck" would be Bob Joehnck, a phenomenal southern CA engine builder in the '50s and '60 (and perhaps even later, too). He built engines for the Shelly Washburn Corvettes driven by Bob Bondurant.

My take is that it's a pretty rare piece of history. If it were mine, I wouldn't hack it up.

Jim

427Hotrod

Yep...pretty cool. I wouldn't hack on it either.
There was a version of the early smallblocks that stuck the pcv into the oil fill tube. I'm thinking Chevy II or Camaro. I've done it that way and it looks pretty clean and works OK.

JIM

Plasticman

From Edelbrock History:

A GREAT CREW
Vic Sr. left behind a great team of very talented people. Bobby Meeks, Don Towle and Robert Bradford were on hand to assist Vic Jr. in continuing his father’s dream. In 1964, a good friend named Bob Joehnck saw an opportunity to develop an intake for a small-block Chevy. Vic’s response was, “No, the factory already makes a manifold.” He changed his mind a week later. The C-4B manifold was another turning point for the Edelbrock Equipment Company...............

From Hemmings:

Joehnck organized and founded The Goleta Drages which was the first 1-4 mile drag race. He has countless speed records with his legendary motors and inventor of the Edelbrock C4B intake manifold.

From Wikipedia (on Edelbrock):

Another critical turning point in the company's history was the 1964 decision to build a small-block Chevy intake manifold for a 4-barrel carburetor. The C-4B manifold, developed with help from Bob Joehnck, opened the door to a new line of performance products.


His company info is here. Why not call them and see if they can provide more info:

Bob Joehnck Automotive, Robert D Joehnck, Joehnck Automotive
133 W Figueroa Street
Santa Barbara, CA 93101-3105

Phone: (805) 962-1773

Plasticman

LSUvetteguy

Fine old piece of automotive muscle history. I wouldn't cut it up.

Scott Marzahl

Why not use a '67 L79 oil fill tube with the screw in PCV?

wmf62

there is already an opening for a fitting for PVC vacuum in the intake (the square-headed brass plug on top of the runner). what he needs is a place to draw fresh air to purge crankcase vapors.

i suggest something like the LT1 valve covers, using either a push-in breather cap or a hose to the aircleaner.



Bill

Smilie 388

What I was trying to do was vent the crankcase . The fill tube has a breather cap I just wanted to move the PCV valve from the side of the valve cover to see if that would stop it from sucking up oil . If it was an early block it would have the vent tube at the back by the dist .
Since it seems that this manifold is so rare I won't drill holes in it .
As cast it already looks port matched .

wmf62

LT1 valve covers have baffles in them. venting through the valve covers is the only way i know of to get flow throw the engine, other than the block hole in the back (which you don't have) or modifying your intake like many others have done.

get 2 without the oil filler cap if you want to continue to use your stock filler tube.

Bill

narlee

Here is a little info I found. It is towards the bottom under the heading "A GREAT CREW"

http://www.edelbrock.com/automotive_..._history.shtml

Plasticman

Narlee,

You did not read my post #4..........

Plasticman

narlee

MY BAD! I read some then earlier then apparently went past it when I came back. I'll try to do better but no guarantees.

Plasticman

Narlee,

We ALL fall into that occasionally..........me too.

I just woke up on the wrong side (this afternoon).

John

amtronic1

Please correct me if I have this wrong, but if you have an open oil breather, you do not want a PCV valve. If you do, you are simply drawing air thru the oil breather, thru the engine, and into the intake, leaning the mixture out. If you want to have a PCV valve, you need a closed crankcase so only blowby is drawn into the intake.
Since that intake manifold has an oil filler tube and uses a breather, that would be why it is sucking so much oil thru the valve cover. It shouldn't have hardly any airflow at all.

Smilie 388

if you just use a PCV valve with no breather you'll suck the gaskets out (usually from under the intake) . Pre PCV motors just used a draft tube to vent all the blowby and vapors to atmosphere .
I'm thinking it's sucking oil cause there's no shield or baffle over the end of the PCV valve in the cover .

wmf62

i think you're wrong

in order to draw volitiles out of the engine you have to flow air through it. only having a pcv will essentially put manifold vacuum in your crankcase and probably suck the seals out (in).

look at any engine and you will see somewhere where the air is pulled in; whether it is the filler tube, the air cleaner, a valve cover, or the block.

Bill

Black_Magic

Here is some PCV info ====> click here

George

GUSTO14

Leigh, another option is to go with a set of these...

http://www.yourcovers.com/valve_covers_11026.php

They come as cast, polished or powder coated, with baffles inside and all you need to do is mill a hole in the side of the cover (they will do it for you for a small fee) to add either a breather or a PCV grommet to plumb your crankcase ventilation system.

This image shows better what the provision on the side of the cover looks like. Since these are on my '63, I didn't need to use this provision but we did put a set on a customers '75 that he wanted to incorporate the PCV on.

They also sell what they refer to as "specials", which are nothing more than covers with small flaws, at a reduced cost. You can call them and ask if they have what you're looking for and the specials change all of the time.

GOOD luck... GUSTO

Subfixer

Not to steal this thread, but Gusto, where did you get the carb fuel line in the picture above? Very clean installation.

63 340HP

It is likely to have been port matched to the heads.

I have a mid-80's 350 reported to be build by Bob Joehnck, with a fairly radical roller cam engraved "Joehnck" on the end. The Bowtie Vic Jr manifold that came with it was mildly ported matched to the heads.

If the manifold is close to the C4B it will need some port match attention for anything larger than the stock 461/462 intake ports.

Edelbrock has always cast parts for other manufacturers and builders (for a price). You have a great piece of history.