Nice pentroof valve covers - where to buy?

[computerworks]

Looking really good.

(....black oil filler cap, OK?)

[double ugly]

Otay.
John

[RodKnock]

John, why aren't you running a oil evaporator (puke) tank instead of the tube?

[RodKnock]

OK, the Shelby intake has a provision to run the puke tank in back, but no provision for the tube in front. Thus, would it seem odd running a functional puke tank and two breather caps on the valve covers. Otherwise, I would have to change the intake to run closed valve covers and a fill tube in front. If correct, then I think I'm getting the hang of this.

[double ugly]

Ron, is this OK?

[cobred]

Originally Posted by Power Surge

If you use the fill tube, you can't have a PCV. into the engine).

Sal, why not? I have the Blue Thunder with the fill tube and breather in front.In the back I have the pcv adaptor with the vacuum hose into the base of the carb. Seems to work fine so far. Any reason this is no good?

[cobred]

Originally Posted by Power Surge

If you use the fill tube, you can't have a PCV. into the engine).

Sal, why not? I have the Blue Thunder with the fill tube and breather in front.In the back I have the pcv adaptor with the vacuum hose into the base of the carb. Seems to work fine so far. Any reason this is no good?

[cobred]

Originally Posted by Power Surge

.

If you use the fill tube, you can't have a PCV.the engine) or off the back of the intake and to the intake/carb.

Sal, why not? I have the Blue Thunder with the fill tube and breather in front.In the back I have the pcv adaptor with the vacuum hose into the base of the carb. Seems to work fine so far. Any reason this is no good?

[cobred]

Sal, why cant you use a pcv with the oil fill tube? I have the Blue Thunder with the fill tube and breather in front. In the back I have the pcv adaptor with the vacuum hose into the base of the carb. Seems to work fine so far. Any reason this is no good?

[Power Surge]

Originally Posted by cobred

Sal, why cant you use a pcv with the oil fill tube? I have the Blue Thunder with the fill tube and breather in front. In the back I have the pcv adaptor with the vacuum hose into the base of the carb. Seems to work fine so far. Any reason this is no good?

It won't work as it's supposed to, because you're taking in outside air. A PCV system should be a closed crankcase.

[Power Surge]

Originally Posted by double ugly

Ron, is this OK?

John, you can buy the back cap with the oil fill decal on them, they are available.

Also, the rear "S" breather was for the street cars, it shouldn't be used on a comp 1x4 setup (if you're going for originality).

[cobred]

[quote=Power Surge;

If you use the fill tube, you can't have a PCV. If you use the plug, you can have a PCV. You can run a PCV two ways... either coming off the valve cover and going to the intake/carb (to be injested into the engine) or off the back of the intake and to the intake/carb.[/QUOTE]

Sal, why not? I have the Blue Thunder with the fill tube and breather in front.In the back I have the pcv adaptor with the vacuum hose into the base of the carb. Seems to work fine so far. Any reason this is no good?

[JeepSnake]

I'm not an FE guy, so this could be wrong...

cobraed - What you've just described should work fine; it's just not technically a "closed" crankcase ventilation system.

This setup is what is found on the 283 smallblock in my 1967 (insert name of Ford's chief rival) Malibu. Fresh air flows into the crankcase through the vented oil filler cap at the front of the intake. It passes through the crankcase and up to the PCV valve at the back of the intake, then into the carburetor baseplate. It's a "positive" ventilation system, but it is not "closed" because under high throttle, etc., crankcase gasses can still escape to atmosphere through the oil filler cap vent.

The system only becomes "closed" if the vented oil cap is sealed and replaced with a tube going into the air cleaner. Then, under heavy throttle, the blowby gasses that would have escaped go into the air cleaner where they are pulled in to burn.

Now, as I said, this is info coming from "The Dark Side," and the setup in an FE may be different. If so, do tell! I'm still learning on these Fords!

[SuperHart]

OEM PCV systems not only have a PCV valve to suck pollution products OUT of the crank case but also have a filtered inlet breather to introduce clean air INTO the crank case. Most of the OEM inlet filters are plumbed into the air cleaner outside the diameter of the air filter element and have those coarse filters that look like furnace filter material and a rubber hose attaching it to a valve cover. This hose is plumbed into one valve cover while the exit (PCV Vlave) is plumbed into the opposite side valve cover. The idea is to NOT create a vacuum situation inside the crank case. For those of us who do not use an OEM stock air cleaner (read that, ALL Cobra owners) we use either an oil filler cap with a breather built in or a separate breather in one valve cover and the PCV valve in the other cover. That's why the rubber grommets for the valve cover openings come in sets of two, one for a PCV valve and the other for a breather.

[patrickt]

Originally Posted by Power Surge

It won't work as it's supposed to, because you're taking in outside air. A PCV system should be a closed crankcase.

That's only true if you're concerned about the PCV system as a pollution control device -- an "open" PCV will still do a fine job on your crankcase, but it also let's fumes leak out to the environment as well. If you're like me, and you only care about your engine, you run an "open" PCV system. Here's a short paper on it if you want to read more: http://www.baldwinfilter.com/engineer/pdf/94-2R1.pdf

[767Jockey]

Guys, check this auction on eBay: 370021735909
Are these Perntroof 's? I'm sure they're crappy, but I hear that Brand's aren''t the greatest, either. If they're the right shape and look I may give them a try, all I can lose is a few bucks. What do you think? Do they look like the right shape?

[Power Surge]

Yes, that's true, you could run an open PCV. I am so used to modern cars where the "inlet" side of the PCV system comes from a closed source. But it is the same thing, you're either just taking in filtered air through the intake source, or air through a breather. My bad.

[SuperHart]

The covers shown in the eBay ad are NOT pentroof covers. They are cheap Chinese repros. Branda covers are much better than those. Branda covers do NOT have oil baffles installed so you will need to fashion a pair of baffles to keep the PCV valve from sucking oil. Here is a link to a schematic on my web page that crudely shows how to make a baffle from aluminum roof flashing sheet. The baffle is held in place by the rubber grommet that mounts into the valve cover hole. I have used them on my pentroof covers for three years without problem.

http://home.comcast.net/~superhart/baffle.jpg For some reason, the reply editor won't let me insert the actual image. Oh well.

Here is the link to my build page for the entire story. http://home.comcast.net/~superhart/cobra5.htm

[cobrajam]

eBay Motors: FORD VALVE COVERS 58-76 352-390-406-427-428 FE (item 370021735909 end time Feb-16-08 20:40:26 PST)
No, these are not pentroofs. They are just round top valve covers, and they actually look cheaper in person than the $19.99 price. Here are some aluminum aftermarkets ones that look like they have a neat place to put the 427 Cobra Ford badge. eBay Motors: FE 390 427 428 Finned Aluminum Pent Roof Valve Covers (item 120219283470 end time Feb-10-08 17:18:03 PST) Another option might be eBay Motors: Aluminum 427 FE big block cobra valve covers (item 300196587539 end time Feb-11-08 21:10:57 PST) you could always hand paint your cars body color in between the fins(?)

[767Jockey]

Thanks, aluminum isn't for me.