Ok, tonight the Intake tubing goes in for my turbo, and i have that little vacum line that comes otu of my crank case that most replace with a K&N style crank case breather filter, untill i get one of these what do i do? do i just rip out the tubing? do i leave it just hanging there and not connected to anything? and where can i get a crank case breather? how much?

 

I just let mine sit there not connected to anything

 

hook it up to the intake between the turbo and the filter. also, use a slash cut tube to direct air flow. like this:

 

i see what you are saying, but my piping doesnt have a hole to begin with to put that slash cut in

 

you have to drill some in the piping. does anyone have some pics of this done on their car, pls post.

 

drill one....drill one in the rubber of the filter. im sure you can figure out a way to attach it and make sure the slash cut tube doesn't rotate around ( that would be bad! )

but really, the breather valve is not good for your engine....especially your piston rings.

 

look at pics of a fmax setup, it come like that (sans slash cut tube)

 

why is a breather bad for the piston rings? Also what is the orig. tube in its place used for?

 

its bad because, air needs to flow through the crank case for oil vapors to be filtered out. however, your engine doesn't suck air in, it needs to be pushed in. Thats why on a stock car, there is a hose hooked up.

stock, your car does this. the tube is place on an angle so air is pushed into the valve cover. you need to either mount the tube on an angle, or make a slash cut tube to make sure the air is forced into the valve cover. if you dont do this, or face it the other way, air will be sucked out and you will have oil going through your turbo, and into your intake path....BAD

 

Actually stock it's not at an angle or slash cut or anything. It is a straight tube stuck directly into the path of the intake at a 90 degree angle. I dont think this creates any pressure in the crankcase, I think it's meant to suck blow by out of the crankcase and recirculate it back into the engine.



[Modified by TurboInteg95, 5:39 PM 10/8/2001]

 

so the pic you just posted is the piece that connects to you your throttle body correct?

 

that is the stock intake tube with the stock breather tube, there is no slash cut and no angle. I had cut the stock breather tube that goes into the intake for some reason that I cant remember. However, that is the stock piece that goes into the stock intake.

 

Someone is spouting off T.O.O. knowledge again. On a FI motor, you do not want that oil residue back in your intake air. Under boost you DO get oil blowby, and thus pressurization of the crankcase. There is no way that an oil/air mix can increase the detonation resistance of your fuel mix.

I say either use a catch can (do the PCV too) or just use the breather filter.

Dustin

 

Yes, a catch can is the best choice, I'm just to cheap to get one and to lazy to hook it all up so I just leave it as a vent. An interesting experiment would be to physically monitor that open tube while doing a dyno pull just to see what REALLY is going on with it.

 

So you suggest i should just get the K&N style breather dustin? also, what do i do with that O2 sensor that is ziptied along with the bretheer valve, it used to plug into my AEM CAI into a grommet, but now i dont have my AEM cai, so where does this go with a turbo set up? ????????????


SOOOOOOO CONFUSED!

 

hey turbointeg,
you didnt just leave your hanging, from the pics in the turbo roll call you have yours going from your valve cover back to your intake manifold!

jesus i am confused, someone set me straight, slap me!

 

Hehe, Dustin, is that a good thing or a bad thing? Ok, TurboInteg95, your right, its not slash cut stock, but I do know (by looking at Honda's diagrams) that air is supposed to flow from the intake into the valve cover. And I also know, that from the high air flow FI cars can cause air to flow the other way, thats why the slash cut tube is good.

But, yeah, a catch can is the best set up. BTW, its really not that expensive. I'm doing mine for under $80.

 

NYb16, that's the PCV valve, we're all talking about the breather thing off to the left. On the newer LS motors the PCV valves are off the valve cover, on the older LS motors there was sort of a catch can for the PCV valve on the back of the motor.

 

the thing with hooking up the slash cut tube on an FI car to the intake is that you will have air flowing into the crankcase but there will be no way for that air to escape, the PCV valve will be closed due to the boost, so in turn you are pressurizing the crankcase. On an NA car there is still a little bit of vac to keep the PCV open. if you leave it open however, the pressure will be neutral and the blow by can escape through the open breather. And when you're at vacuum, blow by can easily escape through the PCV valve into the intake manifold. the breather tube is just an intake for the PCV system basically, you can leave it open to the atmosphere or hook it up to a filtered source. I dont think air is supposed to be forced into the breather.

 

I do not think it is supposed to be under pressure either, honda designed it to be under vacuum. That is why they hooked it to the intake piping.

Dustin

 

well they do show air flowing into the breather in the Helms manual (pg11-134), basically it's the intake for the PCV valve that is sucking on the crankcase. that's how I understand it.

 

Yeah, I think it will work fine open atmosphere like you said.

Dustin

 

yeah pretty much that was the whole point of this post.

 

"An interesting experiment would be to physically monitor that open tube while doing a dyno pull just to see what REALLY is going on with it. "


I have seen my car on the dyno and actually watched it myself. As soon as boost hits...... lots of crap comes out. I mean LOTS. It would suck air in under vacuum and then when boost kicked in, lots of smoke, mostly white would shoot out. Atleast that was my experience with it. I assume it is mostly pollution/blow by from rings going bad....

 

yeah I think you might be right, that sounds like bad rings. In theory if you had a good motor there would be hardly anything coming out of that breather, especially smoke and crap.