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Post by Meteorgirl on Mar 4, 2008 8:19:46 GMT -5
Also don't forget about the smell of oil vapor in your car without a PCV. Unless you have an original road draft tube, that smell is awful. PCV's also make sure that oil vapor is burned thru the exhaust and not just vented raw. Thats why they invented PCV's and got rid of the RD tubes.
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Post by Meteorgirl on Mar 10, 2008 0:32:55 GMT -5
So it turns out that hubby had ordered me a set of tall Ford Racing covers for Valentines day in case my old ones didn't clear. Well we did make them clear but I wanted to see what these lookd like on anyway. Before we put them on I took some pix side by side with the old one so I could show everyone the height difference. I'll post the pix soon. Oh yeah, I'll be keepimg the new ones on. They look soo good.
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Post by ca on Mar 15, 2008 17:58:11 GMT -5
hey MG, where are them pics?
do you have the inside dimensions of the new covers by chance?
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Post by Meteorgirl on Mar 15, 2008 18:03:29 GMT -5
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Post by ca on Mar 15, 2008 19:57:10 GMT -5
now that's a nice set MG top end looks real nice ;D
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Post by 60sFordGuy on Mar 15, 2008 23:42:01 GMT -5
I just received the same Ford Racing VC's from Summit. They will replace the cast aluminum ones that I have emblazoned with "260" emblems, because those don't have ports for oil filler caps/breathers, and I want to try to eliminate the blowby from the filler tube on the 260 engine. I bored and tapped the back end of the passenger side cover to install a PCV, but the driver side cover is still without any ports for filler/PCV. I'm getting ready to redo the heat/air/defrost unit, and to attempt to correct the problem in the dash with the burning out of the CVR. Hope to get started on Tuesday or Wednesday, providing the weather gets better.
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Post by Meteorgirl on Mar 16, 2008 10:55:49 GMT -5
Running the PCV on the passenger side is a major step. What you can do with the hole in the drivers side cover is get a nice metal or plastic elbow to fit the extra grommet with the smaller hole they supply and just run a "breather" hose to your air cleaner. You can pipe it either to the side like they did in the 70's or 80's or if you have a custom air cleaner, just bring it in the bottom. Now when the crankcase pressure is high and the PCV isn't taking it all, it will pipe the extra smoke into the air cleaner where it will end up being burnt and sent out the tailpipe. If the smoke is excessive, hubby suggests using a "vent" filter inside the air cleaner, again from a 70's or 80's car to catch the extra oil.
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Post by 60sFordGuy on Mar 16, 2008 13:22:21 GMT -5
I should have mentioned that I'm running a hi-rise aluminum intake with a Holley 4V carb. My PCV hose comes off the carb base, and already routes to the back end of the Passenger side vc, so I don't think I'll have much of a routing problem to the PCV valve in a grommet in the valve cover. If needed, I'll add a 90* fitting to clean up the routing.
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Post by ca on Mar 16, 2008 13:43:31 GMT -5
if the smoke is excessive just rebuild it. i bought a car off a guy once and he had a gallon gas can plumbed between the rocker cover and the carb base to trap the oil out of the vapor and it was half full of oil i heard you can buy air filter bases(for the open type filters) with the nipple on the bottom but it would be easy to get a couple of fittings at the hardware store to do it yurself after drillin a hole. thats my plan anyway. gotta make sure you seal up the filler tube AND the dipstick tube with a good grommet or you will still have vapor floatin around even with the lower pressure area behind the air filter.
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Post by ca on Mar 16, 2008 13:47:53 GMT -5
hey Thayne, i was typin when you were postin. which type of fresh air are you usin for the PCV? or should i say like where is it comin from?
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Post by 60sFordGuy on Mar 16, 2008 19:56:49 GMT -5
CA, I'm not certain I understand "fresh air", so will try to describe how mine is set up. It will need to wait until tomorrow so I can look at where the hose connects at the carb/intake. It's 35* now, with possible snow/rain, and I'm in my comfy warm house slippers, so don't want to go out to the garage until I'm dressed tomorrow.
Also, thanks for the eBay # for the back of the instrument panel. I'll check that out.l
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Post by Meteorgirl on Mar 16, 2008 21:16:54 GMT -5
When you use a PCV hooked to a carb(intake) vacuum, you are pulling air OUT of the motor so you have to have a way for "fresh air" to get in. Look at the pix of my setup. The fresh air comes in thru the breather on the drivers side under high vacuum so the engine does not go into a state of vacuum in the crankcase. This could cause things like intake end seals to suck into the motor. There are probably times that under hard acceleration that blow by from the rings actually create excessive positive pressure in the crankcase and the valve cover breather now serves as a way to "exhale" the extra pressure. On your motor, the blowby may be excessive all the time and that is why I suggested the PCV/vacuum setup on the pass side and the "blowby" hose on the drivers side to the air cleaner base. You will still need a way to maintain your crankcase at zero vacuum/pressure and that is where your original breather cap on the oil tube (221-260) would still be handy.
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Post by ca on Mar 16, 2008 22:26:25 GMT -5
the reason the automakers went to the "closed system" in the late 60s was because ALL engines go positive at sometime even with a PCV and start spewin crankcase vapor out of the "open type" end. put the fresh air inlet inside the air filter and close off the filler and dipstick tube and you'll be a happier man. my SAE Smog Cert. classes are still stuck in my brain but i don't know if thats a good thing
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Post by minimandan1 on Mar 17, 2008 0:09:30 GMT -5
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Post by 60sFordGuy on Mar 17, 2008 9:15:39 GMT -5
CA & MG, Thanks for the VERY ENLIGHTENING info, but I still am slightly confused. With a valve cover breather such as on MG's engine, do I still need a "blow by" hose to the carb breather, if I retain the breather cap on the oil tube? I'm running a K&N carb filter, and am looking at my Summit catalogue that has a K&N vc breather, but it doesn't appear to have a means to connect a hose from it to the carb breather. As I understand it at this point, the vc breather on the driver side and PCV from the driver side vc to the carb/intake would preclude the need for the hose.
Thayne
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