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Author
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Topic: carb/pcv/air breather
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rmousir
Gearhead Posts: 1124
From: Amelia, Ohio
Registered: May 2003
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posted 08-29-2004 07:53 PM
 
Ok everyone could really use some suggestions here. I have a 73 302 in my 66 coupe. When I got it the air cleaner was very very dirty. So much so that I did not even keep it. I went out and bought a cheap little chrome one. Now I never had the original one so I did not know any better on what to get. Now I don't have the oil fill/pcv breather hooked to any thing so the fumes just blow and I end up smelling pretty when I drive my stang. Some one on the forum said that there is a breather hose on the carb that I could hook this to. I found a breather tube but it is on the top half of the carb (2b carb). Now I could hook the oil breather to that breather on the carb but I am worried that the oil fumes will gum up the carb. I can also go back and buy an original style air breather but I think that would hurt performance (I need all that I can get). So I am asking what can I do? Should I hook the breather to the carb or should I go back to the original style air breather set up? Does all this make sense? Any info or suggetions are greatly appreciated. I am going to pick up parts this coming saturday so if you could help out by then that would be great. Also if I happen to go the origanal set up any one have a good brather that I could pick up cheap? ( i have also already posted this in the wanted section. Thanks very much. Richard. If you want to see what set up I already have check out my site. ------------------
rmousir
'66 Mustang Coup
Ford Blue & white stripes
302 auto
work in progress -
[email protected]
Check out my site:
rmousir's 66 mustang
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skips69
Gearhead Posts: 346
From: Catlin, IL USA
Registered: Mar 2001
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posted 08-30-2004 02:21 AM
An original style breather will not "noticeably" affect your performance for a stock and/or high mileage engine. If the PCV valve is not working or is not hooked up, I would think some value could be gained by hooking it back up/making sure it is working, etc. 1) option is to go to a junkyard and buy a used OEM style of air cleaner assembly. Doesn't matter from what engine, just as long as it seals to your carb and has the oil breather filter connection. You can run your PCV hose to it. 2) Go to Autozone, Pepboys, Summit, Jegs or whatever and buy a different chrome air cleaner, but this time one that has the PCV elbow option. I bought an Edelbrock Signature series Chrome 14" breather locally and I have the PCV elbow with it. $30.00 out the door.
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whiteknight289
Gearhead Posts: 1391
From: Wheaton, IL, USA
Registered: Mar 2004
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posted 08-30-2004 11:00 AM
Richard,
There are two different hoses we're talking about here..The first one, an oil breather, is to allow filtered are IN to the valve cover via an oil fill cap. Sometimes these have hoses running to the top of the carb or air cleaner and sometimes it is just a cap that has holes and a filter media in it to prevent dirt from getting into the engine. They just work off atmospheric pressure. The second one, the PCV (Positive Crancase Ventilation) uses engine vacuum to suck air OUT of the valve cover. This always has a hose and to be functional it must be connected to engine vacuum AFTER the carburetor, not before. Usually Ford used a spacer plate under the carb that has a nipple at the back for the hose to hook onto. Oil fume getting sucked into the engine at this point can not gum up the carb because this is already past the carb. Scott
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rmousir
Gearhead Posts: 1124
From: Amelia, Ohio
Registered: May 2003
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posted 08-30-2004 07:50 PM
what is the special plate called? I checked mine and it does not have anywhere to hook the PCV valve to. I am sure that I have the PCV on the drives side valve cover. It has the elbow on top of the oil fill cap. The passenger side valve cover just has a rubber plug in it. So if I go to auto zone and ask for the plate with the plug/nipple for the PCV valve they will know what I am talking about right?Now Can I hook the PCV up to a vacume line on the intake? I have heard that this is not the best way to go. Thanks very much.
Richard ------------------
rmousir
'66 Mustang Coup
Ford Blue & white stripes
302 auto
work in progress -
[email protected]
Check out my site:
rmousir's 66 mustang
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Fastymz
Moderator Posts: 22791
From: Reno Nv M&M #1240
Registered: Apr 2001
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posted 08-30-2004 08:31 PM
The one on your motors drivers side is not a PCV. The driver side you can replace with any breather cap that fits the hole in that valve cover.On the passenger side where the black plug is there should be another breather cap or a PCV and a hose running to a carb spacer with the nipple for the hose from the PCV. If you need the spacer with the nipple let me know. You have a stock 2bl carb right ? ------------------
SCOOP oddly obsessed with big scoops on little Mustangs 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics
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Fastymz
Moderator Posts: 22791
From: Reno Nv M&M #1240
Registered: Apr 2001
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posted 08-30-2004 08:39 PM
You need one like this,http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category= 34198&item=2487944344&rd=1&ssPageName=WDVW
http://www.autoshop101.com/forms/h63.pdf
------------------
SCOOP oddly obsessed with big scoops on little Mustangs 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics [This message has been edited by Fastymz (edited 08-30-2004).]
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trashline
Gearhead Posts: 2230
From: Levittown, Pa
Registered: Dec 2003
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posted 08-30-2004 10:05 PM
thats exactly hwat you need . im having the same problem with my car im putting a two barrel on a one barrel hole and there aint no room for a pcv valve bc of clearance issues. so i have my uncle a tool and die maker fixing up a piece of 3/8 aluminum for a carb spacer to have the right orientation and the pcv valve "nipple" . if you know someone have them make you one up------------------
1966 mustang coupe
200ci, 3.03 3 speed tranny
holley weber two barrel conversion, msd 6a ignition, blaster 2 coil, pertronix, 2 inch exhaust to a glass pac, stock rear (3.20),ram air install complete (homemade)
white w/ black interior, soon be painted antique bronze with the R model apron and gt350 hood scoop (functional)
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65ponycar
Gearhead Posts: 873
From: Dayton, OH
Registered: Jul 2003
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posted 08-31-2004 09:21 PM
I just realized I'm going to be needing one of these also, what a timely post!I already have a 1/2 spacer plate under my Holley; Is there any way to safely drill & tap this (off the car of course)?
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rmousir
Gearhead Posts: 1124
From: Amelia, Ohio
Registered: May 2003
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posted 09-01-2004 10:35 PM
Thanks for the info everyone. Scope, I am a little confused. So I have a lot to say. LOL. On my motor (which is not original and may be pieced together) I have a oil fill cap with a pcv spout out of the top on the drivers side. I have been looking for the spacer and did find a place that would order it for $28 bucks. I thought if I had to order it I would at least try to drill and add a nipple to my current spacer. If that does not work then I will buy a new one. If I just get a new spacer or customize my origianal it should still work right? Regardless of which side of the motor the valve is on. I will also check out and find out what a pcv valve for the passenger side of the car will cost. I am sure they are not expensive. Now in my research for this I have learned that a thicket spacer is a good thing. Is that true? If so why, what are the advantages? Scope, If you have a extra one what would you want for it? PM me and let me know. Thanks very much for your continued info and suggestions. Richard ------------------
rmousir
'66 Mustang Coup
Ford Blue & white stripes
302 auto
work in progress -
[email protected]
Check out my site:
rmousir's 66 mustang
[This message has been edited by rmousir (edited 09-01-2004).]
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Fastymz
Moderator Posts: 22791
From: Reno Nv M&M #1240
Registered: Apr 2001
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posted 09-02-2004 01:08 AM
Richard if you need the spacer it's yours for shipping cost. Email me your address.The tube coming off the oil filler cap is NOT a pcv. It's a breather cap, on the passenger side you need a rubber groument with a hole in it so the PCV which you can pick up for about $5 at any parts store. On the oil fill get another breather thats does not have that tube. ------------------
SCOOP oddly obsessed with big scoops on little Mustangs 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics
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whiteknight289
Gearhead Posts: 1391
From: Wheaton, IL, USA
Registered: Mar 2004
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posted 09-02-2004 09:50 AM
Richard,
I tend to agree with Scoop, I think the elbow coming out of your oil breather cap is a vent only. Try taking it out and shaking it. If it's a PCV it will rattle. If it has a straight thru shot then it is just a breather.
Scott
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rmousir
Gearhead Posts: 1124
From: Amelia, Ohio
Registered: May 2003
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posted 09-02-2004 07:53 PM
Scoop,Email on the way. I went to the local auto zone and checked out the valves. I will pick them up on the weekend. Thanks everyone. I will let you all know how it goes. Richard. ------------------
rmousir
'66 Mustang Coup
Ford Blue & white stripes
302 auto
work in progress -
[email protected]
Check out my site:
rmousir's 66 mustang
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Fastymz
Moderator Posts: 22791
From: Reno Nv M&M #1240
Registered: Apr 2001
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posted 09-02-2004 08:02 PM
Got it, as soon as I find it I'll get it out to you.------------------
SCOOP oddly obsessed with big scoops on little Mustangs 65 coupe,351w,C4,Big Boss 429 hood scoop,8" 3.40 TracLoc. My Pics
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