What is this hose for?

[BlkZoomZoom]

during extremely high load, if the volume of blow by exceeds the ability of the PCV valve to draw in vapors, the excess blow by flows THRU the breather hose to the combustion chamber OR BREATHER. If using a breather, the excess blow by simply vents to the atmosphere. the pintle in the PCV controls air that enters the crankcase. only a small volume is pulled in if using a breather, not usually causing vacuumm concerns due to various check valves in place.

edit: You got me on the combustion chamber, I assumed you meant Crankcase system. You have proven the point for me. It will cause a vacuum leak. What check valves are you talking about?

 

[Notorious_V.I.C]

So it's bad to have a Valve Cover breather?? i mean if it's like having a vaccum leak then that's not good.

 

[bazooka joe]

Are you asking me? lol.

sorry, yes! i assumed, which is wrong, that the on a FI car it was a better set up??

 

[BlkZoomZoom]

It won't affect some cars as much as it will others. On a Msp I saw the fuel trims change over 5% by putting a filter there. If the rest of the system isn't up to snuff, it will cause driveability problems.

 

[bazooka joe]

It won't affect some cars as much as it will others. On a Msp I saw the fuel trims change over 5% by putting a filter there. If the rest of the system isn't up to snuff, it will cause driveability problems.

it makes sense, the car was engineered a certain way for a reason...and like you said that pcm will recognize it every time!

how would i change my current set up to eliminate the breather?

 

[Kansei]

it makes sense, the car was engineered a certain way for a reason...and like you said that pcm will recognize it every time!

how would i change my current set up to eliminate the breather?

You'd just need a hose to your intake piping, post-MAF so that measured air stays in the system I'd assume.

 

[bazooka joe]

You'd just need a hose to your intake piping, post-MAF so that measured air stays in the system I'd assume.

easier said then done!

 

[Kansei]

After the IC and everything should be fine too. Of course, that means you'd have to have a nipple welded into your pipes or something.

 

[Jeph]

Yeah, can't you just run it back to the intercooler piping after the intercooler. Somewhere closer to the throttle body?

 

[Dr.Sound]

^ omg!
think about it....after the intercooler (or anywhere after turbo) there is pressure in the pipes.
u will be blowing compressed air INTO the valve cover if you were to put it anywhere after the turbo!!

(poke)

 

[Jeph]

Jesus, my bad. don't get your panties in a bunch.

 

[Dr.Sound]

lol

 

[BlkZoomZoom]

Good point though.

 

[bazooka joe]

very good point!!

 

[Dr.Sound]

thank you, thank you.... *bows*
i'll be here all night.

 

[bazooka joe]

thank you, thank you.... *bows*
i'll be here all night.

haha

 

[bazooka joe]

so i should probably reattach my line to the cover...eh? it seems like that's the concensus, it's what i've been reading also..
what's one more stinkin red hose!

 

[dirtysouth_msp]

Hey Bazooka, you could replace that flex pipe on your intake with a metal pipe (roughly same length) with a nipple welded on for the hose. That should take care of it and should not cost much $$.

 

[Dr.Sound]

or you can use a rubber gromet/nipple like this:

 

[Kansei]

Oh wow, thanks for pointing out the whole thing about having compressed air.

I'm naturally aspirated as you can probably tell.

Mark, maybe just put that welded short pipe that you didn't like back in place? (shrug)