Pcv

[Jeffguy11]

I noticed on my buddies built saleen that the PCV system was removed and a breather put in its place... would this benefit a mark?? i noticed on my 98 that it pulls crankcase air back into the upper intake.. would getting rid of this make the air charge a little colder? just curious.

 

[driller]

The PCV system is an emissions control device that pulls air FROM the filtered intake into into the crankcase, through the PCV valve into the intake past the throttle body. This is necessary to remove blow-by gases and reduce oil breakdown. I doubt any performance gains are made from running an open crankcase with breathers.

My disdain is the oil/fumes from the PCV system being ingested into the induction air tracts and causing sludge/carbon buildup which in our setups will over time impede airflow and the operation of the secondary butterflies in the IMRCs.

You can mitigate this with a simple oil separator in the PCV circuit between the PCV valve and the intake.

 

[98LSC32V]

My friend put on a breather on his 2004 Mach 1 and noticed his idle got worse.

 

[unity]

This is generally not a "good" idea. Contrary to belief, it has nothing to do with emissions. Instead, it pulls potentially volatile fumes out of the crank case. If these fumes are not removed there is the potential of explosion. Crank case venting has been used in vehicles for a long time, way before "emissions" was associated with automobiles. The oil separator is a great install and a great idea and something I want to add to mine this year.

 

[turborich]

If your pcv valve is not pluged in (say laying on the valve cover) it will still pass emissions here unless there is blow by coming out then it is a fail.

 

[Moes8]

where might one buy this seperator device???????

 

[Jeffguy11]

where might one buy this seperator device???????

X 2

 

[dRock95MarkVIII]

X 2

You can get them from Lowes, Home Depot - or any home improvement / hardware store.

They will be in the pneumatic tools / air compressor section. Its actually a water separator / filter but will also separate oil.


I installed one on my Marquis, and have another waiting for the Mark whenever I swap out the PCV quick - pic installed on my Marq:
(on pass valve cover)

Blurry close-up and description in caption:

<-----(click)

At Lowes they only carry the blue ones now (Kobalt branded), I prefer the black style (mines a Campbell|Hausfield) myself for a more OEM look


This is a popular mod for Cobra and Lightning owners as the have issues sucking up oil from the PCV. Some after market performance vendors have taken advantage of this and package up the same item, throw in two cheap 1/4" NPT 3/8" hose barbs and a little bracket and jack up the price.

 

[dRock95MarkVIII]

Examples, these are the blue Kobalt ones I was talking about:
http://www.lowes.com/lowes/lkn?action=productDetail&productId=221014-1126-KBA10800AV&lpage=none
http://www.lowes.com/lowes/lkn?action=productDetail&productId=221024-1126-KBA10600AV&lpage=none

 

[driller]

I bought mine in a kit from ebay. Probably paid too much but I had credits.

 

[turborich]

Those are really helpful for a turbo or supercharged car.

 

[MediumD]

This is generally not a "good" idea. Contrary to belief, it has nothing to do with emissions.

While I agree, removing the PCV system provides essentially no benefit, it has everything to do with emissions. Prior to being vented to the intake, blow by was vented behind the motor into the atmosphere and onto the road. The center of lanes used to be darker colored due to the crap being emitted by vehicles onto the road.

 

[turborich]

While I agree, removing the PCV system provides essentially no benefit, it has everything to do with emissions. Prior to being vented to the intake, blow by was vented behind the motor into the atmosphere and onto the road. The center of lanes used to be darker colored due to the crap being emitted by vehicles onto the road.

TRUE! The hose would run behind the engine like you said and would hang by the oil pan, they cut the hose at an angle so that the air passing over the hose would act as a vacuum and help to pull it out.

 

[Scorpio1118_2000]

Is there a how - to for this mod? B/c If it will help my MarkVIII run better then Im all for it.

 

[unity]

While I agree, removing the PCV system provides essentially no benefit, it has everything to do with emissions. Prior to being vented to the intake, blow by was vented behind the motor into the atmosphere and onto the road. The center of lanes used to be darker colored due to the crap being emitted by vehicles onto the road.

No. Like I said, its to pull out potentially harmful fumes in the crank case. That is what it is primarily designed for. While its true that its now pulled into the vacuum system for "environmental sake" and considered part of the emissions- I think sometime in the 60s maybe.....

Vehicles from all ages a PCV design of some sort. I've seen draft tubes on 40s trucks, etc.... there were no emission mandates back then, well not like today.

What I am getting at though is that removal of the system can be very dangerous. Anytime someone associates "emission control" to a car part there is someone who wants to remove it thinking it will have some gain - such as EGR, the cats, etc...

The PCV should not be removed, plain and simple.