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| is this pic accurate? https://slantsix.org/forum/viewtopic.php?t=37631 |
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| Author: | 62Signet [ Sat Oct 24, 2009 12:08 am ] |
| Post subject: | is this pic accurate? |
There's a picture on Wikipedia http://upload.wikimedia.org/wikipedia/c ... perpak.jpg. They don't use a breather/oil cap with a tube to the air cleaner, but only a tube to the carb. I have a similar valve cover (offenhauser finned) and I cannot add a tube to my carb (heat box covers rear section). So I only have an oil cap with tube to air cleaner, I have to mop up the valve cover on occasion. How does this run? Could I convert to what this pic shows this and have it work fine? I was under the impression 2-way venting was best, and something like this might not really be favorable? |
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| Author: | theslantingsix [ Sat Oct 24, 2009 6:20 am ] |
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it might have been for emissions cause the clifford valve cover has no place for a pcv valve so the guy just added it |
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| Author: | Aggressive Ted [ Sat Oct 24, 2009 10:17 am ] |
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You can drill the back part of the cover near the fire wall where the finned section stops and put the PCV there instead of up front like in the picture. He must be sucking lots of air down through the dipstick tube.... Search on this site for the Offy valve cover buy, and the correct mod and parts are described there.... I run the PCV at the back and the fresh air intake at the front which pulls from the air cleaner base, clean filtered air. There is no road grime or dirt inside my engine. Click on the red link below my name for pictures. |
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| Author: | 62Signet [ Sat Oct 24, 2009 12:26 pm ] |
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I'm aware of the flat section on the offy valve cover, but the 62 valiant heat box extends over that entire section of the valve cover; this car in this pic is a heater delete car apparently, where that's not an issue. There is literally no room to put a pcv back there with a heat box =/. I had the heat box off the other day and tried to look at ways to put a stant 10078 breather back there for the mod-- it just won't work... It would occupy space where the heat box needs to be. The mod isn't low-profile enough. I'm almost considering swallowing my pride on the finned valve cover and just getting a new generic cover with the 2 breather holes installed (the rear-most is in front of the heat box). |
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| Author: | SlantSixDan [ Sat Oct 24, 2009 1:42 pm ] |
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The setup in the photo is no good. There's noplace for air to enter the crankcase; this will pull a vacuum in the crankcase and can suck in long gaskets (valve cover, oil pan). You need to be sweeping air thru the crankcase; there has to be an inlet and an outlet. There are ways around the difficulty you are seeing. You could put an Offenhauser bolt-on breather on the side of the valve cover, then use the standard up-through-'66 PCV cap arrangement on the oil cap chimney as pictured. Kind of expensive (breather) and clunky (PCV cap). You could use the chimney for an oil cap as intended, mill down a "crop circle" out of the fins close to the rear of the valve cover, make a suitable hole, and put in the 10078 — far enough forward that it'd clear the heater. Or you could drill a hole in the driver-side wall of the valve cover near the rear, tap it for pipe threads, put in a nylon or brass pipe-thread-to-hose-barb fitting, push on a Chrysler p/n 4315 704 elbow, and pop the PCV valve into that. Whichever way you add the PCV valve to the valve cover (preferably as far as possible from the crankcase air inlet, wherever that winds up being), you need to connect the PCV valve to manifold vacuum. Drill and tap the intake manifold plenum (below the carburetor) and install a hose barb. Using the vacuum tap on the rearmost runner is not an acceptable option; it'll make cylinder #6 run lean. |
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| Author: | 62Signet [ Sun Oct 25, 2009 11:12 pm ] |
| Post subject: | |
Quote: There are ways around the difficulty you are seeing. You could put an Offenhauser bolt-on breather on the side of the valve cover, then use the standard up-through-'66 PCV cap arrangement on the oil cap chimney as pictured. Kind of expensive (breather) and clunky (PCV cap).
Interesting, I've never even seen that thing before. I wish they had a pic of it installed, I don't know if I'm picturing it correctly...Quote: Or you could drill a hole in the driver-side wall of the valve cover near the rear, tap it for pipe threads, put in a nylon or brass pipe-thread-to-hose-barb fitting, push on a Chrysler p/n 4315 704 elbow, and pop the PCV valve into that.
I was actually wondering if something this would work... I'm not immediately aware of the clearance of this valve cover wall from the valves, but you think there would be room to install this on the driver's side vertical wall?Quote: Whichever way you add the PCV valve to the valve cover (preferably as far as possible from the crankcase air inlet, wherever that winds up being), you need to connect the PCV valve to manifold vacuum. Drill and tap the intake manifold plenum (below the carburetor) and install a hose barb.
There's an inlet on the Edelbrock I have... It's always been plugged. Is this where I could run the PCV?
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| Author: | SlantSixDan [ Sun Oct 25, 2009 11:58 pm ] |
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Quote: I wish they had a pic of it installed, I don't know if I'm picturing it correctly.
See this image. There's an Offy breather mounted to the inboard wall of the rocker cover. And in this image, there's an Offy breather on each cover.Quote: you think there would be room to install this on the driver's side vertical wall?
Haven't checked, but yes, I think so.Quote: There's an inlet on the Edelbrock I have
On the carb itself? Terrific, that's perfect as long as it's got full manifold vacuum to it (not blocked by base gasket or carb adaptor or anything like that)
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