Which is better idea for a stock car or 2.8 pullied car? The catch can or oil breather that goes on top of valve cover or w.e. Pros cons to both. Yes i have searched just wondering updates from those that have done one or the other. And is tune needed after install of one or other of these?

 

-10an line to replace the stock hose going from the valve cover to the intake

 

? what? lol

 

look up the gm build book i belivev
its got it in there to replace the hose comin from back of VC to intake

 

it's a bigger hose. catch can just catches the oil and doesnt help it vert faster/better justkeeps the oil out of the intake. The breather cap will help it vent better/easier.

 

so a catch can is useless and not needed at all? and does a breather make the car run lean at all???

 

no it wont make it run lean... all it does is allow the windage to come out of the crankcase and vent helping less pressure and **** in side the motor

 

No use in modifying the stock VC anymore, just add this in place of the stock oil cap:

http://www.metcomotorsports.com/prod...d=MBR0003-10AN

 

Catch can > oil breather

 

That and the fact that a catch can has the oil breather on top as well.

 

just do the cheap oil catcher. LOWES husky air compresor catch can.

 

so a catch can is the way to go? who makes a good quality catch can? and i just like way oil breather looks lol kinda exotic haha

 

no..

if you want a catch can get one with a breather on the top, and a -10an inlet and -10an outlet. and change the valves on your valve cover and intake to -10an. just..trust me.

 

i've heard a breather can loose the stock pressure and cause the car to bog occasionally

 

[QUOTE=EXsoccer1921;4825534]no..

guys with srt-4 are doing this so are guys with cobalt and redline. why do you say no?

 

The crankcase ventilation has nothing to do w/ the pressure you're thinking of.

The issue w/ running a filter is that you are bleeding off metered air. That is why the stock system feeds the air back into the intake after the MAF, because it has already passed the MAF once before.

The IDEAL way of doing this would be to vent the cover further by using the provision I linked above and run both that and the stock line to a catch can that does not release to atmosphere (no filter) and run the catch can back to the intake. This would keep the system closed from atmosphere and allow metered air to return, minus any oil accumulation while increasing ventilation. You do not need to go crazy w/ a second dash 10 line unless you're running crazy high boost...

 

^^^^ so is there any con on running a breather on the ecotec?

 

There is no real con. It's not going to hurt anything, it's just a PITA to dial in perfectly w/ the crankcase vented to atmos...

 

so dial everything in first then put the breather on?

 

Do you have any pics on how this would look ? Cuz im runnign a catch can noiw without a breather and i just mite do this modification.

 

couldnt have explained it better myself, people on here that actually know what they are talking about are far and few in between, when you do find someone, listen.

 

Unfortunately, no. I don't really need to do this right now, so I haven't taken on the project. My other problem is that I'm converted to turbo and my MAF is on the pressurized side of the charge piping, which means I would probably have to put a check valve in-line to fee it back after the MAF. Too much trouble when it's not needed.

This would be pretty simple, though. Just screw this in, mount a 90* elbow and run line to the catch can. You're biggest problem would be the fact that your catch can probably just has tube fittings welded on for hose to be clamped on.

You basically just need to feed that fitting and the line on the back of your VC to the catch can and then the catch can to your intake, post MAF. If you have three fittings on the catch can, great! If not, T the VC provision into the oil cap line.

Thanks. I've learned a lot from the Brain Trust on this site and do what I can to continue learning while avoiding the BS. I pretty much only speak about what I have directly experienced. The only time I use second-hand knowledge is when it's coming from someone I KNOW is not mistaken...

 

Thanks dude and good luck with that issue ur having