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By chris70 - 9 Years Ago
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Hello everybody, i was thinking of buying a new carb spacer with a pcv port to hook the PB booster to and close the port in the back of the intake because the back cylinders always run leaner than the front ones.
Would i get the same condition considering that the PCV valve is connectet to the back port of the Holley carb?
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By charliemccraney - 9 Years Ago
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If you have a lean condition and you are sure it is from that port, then you have a vacuum leak. Fix that and your problem will be solved. Maybe the hose or booster itself is bad.
Moving the vacuum source will not solve that problem.
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By miker - 9 Years Ago
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Just to add to Charlie"s comments. Are you running the correct PCV valve? Others here have mentioned different valves, and even using a restricter in the hose to reduce the "vacumn leak" that the valve is.
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By PWH42 - 9 Years Ago
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The only time the PB booster is taking vacuum from the engine is when you step on the brakes and that is only a miniscule amount.As someone else posted,if you are running lean,it has nothing to do with your PB booster being run off of the rear port on the manifold.
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By chris70 - 9 Years Ago
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OK got it.I've found another pcv valve laying around,an AC DELCO cv774c wich has a smaller hole and a stiffer spring inside.I'll check for vacuum leaks on the booster side as well!
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By Kahuna - 9 Years Ago
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Is there a recommended PCV valve that fits into the Valley cover?
I have a valve in the cover now, but have no idea what it's from or whether it works.
The car is not running at the moment
Thanks
Jim
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By wlj1943 - 9 Years Ago
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Jim, the PCV valve conversion kits that many of the T-Bird suppliers sell appear to use the valve and grommet from mid 60's 260/289; it is the right size to fit in the valley cover opening where the road draft tube is now (on T-birds) and has the correct flow for the engine displacement. Note most passenger cars had the breather on the side of the block; you need to plug this; our shop used to put a rubber stopper we sourced from a Lab supply company that oi l and gasoline did not eat up. FYI California started the smog valve thing in 1961, and most cars had to be converted and tested at an approved shop. Mine works well. Later 292's and most medium and heavy duty trucks used PCV valves starting about the mid to late 50's. The screened oil filler cap is the source of clean air.
WJ1943
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By Ted - 9 Years Ago
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For PCV valves being used in the valley covers, I use the Microgard 2322 PCV valve. These fit nicely in the ‘HELP 42323’ rubber grommets which also fit the rear hole in the valley covers that originally used the road draft tubes or PCV valves at the back locations. On those covers, I typically have to remove the ¼-20 threaded stand in the center of the hole to allow the PCV to be fully seated.
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By oldcarmark - 9 Years Ago
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If you want to plug the Hole in the Block where the Road Draft Tube is, a small Cup Type Frost Plug can be tapped in and 2 Bolts plug the threaded Holes. I did mine that way. Can't remember the Plug Size off Hand.
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By 57RancheroJim - 9 Years Ago
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I used on the these when I blocked mine, guy on Ebay sells them.
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By DryLakesRacer - 9 Years Ago
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Ted and all, I just purchased a NOSR PVC valve listed as a replacement for a1961-62 Ford 292. It is rebuildable and on one end has 1/4" pipe threads. Since I have not removed it from its original package and will when installing, I'm assuming the pipe end screws into the carb/manifold. I can get to the rear carb of my dual quads which has a 1/4" plug on the base and my principle carb. I have a valley cover with the hose type fitting pointed up to replace my original 56 cover. Does this sound like all the right parts to do the job? I love "stock" looking stuff. Thanks
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By 314 - 9 Years Ago
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there is a freeze plug that fits the hole for the side road draft tube in the block.
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By Ted - 9 Years Ago
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Ted and all, I just purchased a NOSR PVC valve listed as a replacement for a1961-62 Ford 292. It is rebuildable and on one end has 1/4" pipe threads. Since I have not removed it from its original package and will when installing, I'm assuming the pipe end screws into the carb/manifold. I can get to the rear carb of my dual quads which has a 1/4" plug on the base and my principle carb. I have a valley cover with the hose type fitting pointed up to replace my original 56 cover. Does this sound like all the right parts to do the job? I love "stock" looking stuff. Thanks
I am familiar with the 61-64 pickup PCV valves and that valve needs to screw to the a brass fitting located in front of the carb at the manifold with the hose then connecting to the valley cover. An alternative valve to the 61-64 pickup valve is the Microgard PCV100 valve which is similar but sometimes easier to find.
Here are a couple of pictures of the oem replacement PCV valve with its corresponding brass fitting and the connection for the hose at the rear of the valley cover for the 2V engines. This should help you with the retrofit you are contemplating.
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