Modified PVC system (5.0 Ford)

[TheHawk05]

I've been putting this job off for awhile now but finally got it done today.

Like most people I did the breather cap thing to allow any excess blow-by to just vent to atmosphere. This causes two problems...the most known of which is unmetered air entering the engine which leads to such things as idle issues and off/light throttle lean pops through the exhaust. The other problem is smog issues. Here where I live, having in improper PCV system (ex.using a breather cap) can land you a $300 fine so I was never comfortable using it. Taking a tip from Pro-M's tech section I went about modifying the PCV system so it would function as Ford intended. Here is the tech from the Pro-M site:

"Throw away any breather to the crankcase that does not connect to the downstream side of the Pro-M meter. If you have a turbo or Super-charged system the crankcase vent must be enlarged (5/8 inches to ¾ inches) and again plumbed between the Pro-M and the inlet of the super-charger/turbo."

I decided to go 3/4" to allow ample volume to deal with any blow-by and then made myself a 3/4" elbow out of some steel tubing which I mig welded to the side of the fill tube on the valve cover. I then made a hole in my power pipe to install a grommet and 3/4" 90* elbow I picked up at the auto parts store and then connected the two with a section of hose. Also in my PCV system I run a Tbird Turbo Coupe PCV valve that has a rubber lined orfice that seals shut whenever boost is present. I haven't tested the car yet but I don't forsee any problems other than the possibilty of oil collecting in the hose and entering the power-pipe. I plan to monitor the system closely and if that ends up being the case I'll fab up a catch can system. At least I won't have to worry about the smog cops anymore.

[FoMoCo1]

off topic question but what kind of power pipe do you have?

[TheHawk05]

AFM

[5150 LX]

I did something similiar Hawk, although my tubing is only 3/8". I also installed a filter between the v/c and the power-pipe, hopefully it'll catch any oil that makes it by the breather and keep it outta the s/c.

[wdsonny]

I did something similar. PCV to catch can to S/C housing inlet. It works. Serves dual purpose, gets rid of the oily sludge from the PCV and cools the air (not alot but somewhat).

[EricBlueCoupe]

Looks good. I think I am going to do something similar, except I plan on putting a filter inline there so it will catch any oil (hopefully).

[UNTCHBL]

hmmm, very nice glenn! me thinks to self! :D

[EricBlueCoupe]

Here's what I did last night. I just have it in my head that I don't want any unmetered air, so I rigged this up:



I know it is not as big of a hose as Pro-M recommends, but I am going to try it for a bit. I will check in a few days if there is any oil in the inlet.

[5150 LX]

Where did you pick up that filter???

[EricBlueCoupe]

At work in the HELP! section. It is a Motormite part # 80195. I work at Car Quest, but any parts store should have it.

[sinner]

Nice set up guys.... Hawk keep us updated on whether you need the catch can or if it works ok like that, I may copy your design in the future ;).

[5150 LX]

If I can get off my lazy butt, I'll snap a pic or two of my set-up...

[TheHawk05]

Nice set up guys.... Hawk keep us updated on whether you need the catch can or if it works ok like that, I may copy your design in the future ;).

Works well but I need a catch can as a film of oil is forming already on the inside of the hose. I've put my breather cap back on in the meantime until I fab something new. I should have something ready by next week. I get oil slinging up the fill tube as I don't have a baffle in the valve cover anymore due to my big *** rockers.

[EricBlueCoupe]

I had mine apart today, and I can report that there is zero oil residue in the blower inlet tube. Granted, I have a smaller tube than Hawk, but I have not had any issues using my setup so far.

[Krwy]

I've been running a setup similar to this for about 3 months and 0 issues. The vent tube on my oil filler tube goes into the blower inlet via my bypass valve return tube. Then my PCV is separated and has a check valve in place so that I won't boost the crankcase, and under boost, the blower pulls in crankcase air from the oil filler tube vent. I haven't had a problem with oil in the inlet, and everything has been working good since day one.