95 5.0 breather set up
- Thread starter slopony
- Start date
I had to run a vortex intake elbow and there is a threaded boss that isn't drilled but wasn't sure if I should drill it for the breather line or not. I do have the PCV valve hooked up to the back of the upper intake. so should I drill out the intake pipe for vacuum to the breather? I think I have enough room cause the discharge tube kinda bends around it.
94 DropTop
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I plugged that hole and put a breather filter where the oil cap went
94 Sn-95GT
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First that hose from the oil fill neck shouldn't go to a vacuum source. It should go somewhere between maf and out side of tb blade
2nd if you have a breather on your oil fill neck or where that hose goes on your oil fill neck and a pcv you have a vacuum leak and that needs to be put back or do away with pcv
2nd if you have a breather on your oil fill neck or where that hose goes on your oil fill neck and a pcv you have a vacuum leak and that needs to be put back or do away with pcv
MustangChris
Mythic Level
slopony said:
unless you are running a blower or turbo you should leave that tube in tact. It is part of you PCV system and should be left alone.
The PCV system is used to help releave pressure and "ventalate" (thats what the V means) your "crankcase" (thats the C)
Imagine your crankcase is your bedroom... leave all the doors and windows shut for 2 weeks and never leave... its gunna start stinking, right? well, open a door and that will help the problem... but its still not enough...
open a door and a window and put a fan on the window and the problem is pretty much fixed...
well, thats how your PCV system works from the factory. one window open on the backside, then one door on the front side. and your motors vacuum acts as the fan. by taking the hose off of your valve cover to your intake pipe you are removing the vacuum (fan) from the equation. this makes the PCV system much less effective.
also, this allows un-metered air to enter the system. right now your car measures the amount of air entering and leaving the motor... imagine a closed water system, your job is to measure every drop of water in it... this task becomes much, much more difficult when someone leaves a cap off and rain water gets in CONSTANTLY....
a breather cap (sometimes) becomes needed once a blower is applied to the motor. the increased pressue in the crankcase can cause your dipstick to pop out it gets so strong.... last thing you want is oil spitting out the dipstick tube onto your $75.00 blower-belt... a breather cap allows that pressure to excape when it gets too harsh.
Usually by the time you have this kind of pressure you have a MONSTER blower on the motor.... if you're skilled enough to build a 9 second car with 35 PSI running through it, your PCV isnt something you need to worry about... many run it directly into the exhaust to scavange the pressure out of the crankcase. others use breather caps... etc. etc.
MustangChris
Mythic Level
also, i want to add my car had a breather cap on it when we bought it... ran fine, but i had to wash it occationally. plus the threads that go into the valve cover broke off (K&N breather cap.) the "cool-looks" of a breather cap immediately become undesireable the minute you have to rip a vlave cover off to get half the breather cap that fell into your motor...
well i have pos.locking valve cover breathers on both sides and pvc blocked off.I have had pvc valve catch can all the othe bs.I always had blow by on a new motor(was thinking i cracked a ring on rebuild)and could not get good ring seal.since i have added breathers on each side have has zero problems.blow-by gone good ring seal.never takes a drop of oil.I race car 1/4 mile on weekend and run it hard when i do use it.just my 2 cents
