Crankcase ventilation

[DavidPHumes]

Hey guys,

I am having an issue with my car that I think is the result of insufficient crankcase ventilation (it's a 2.4L with a FP GT3582R).

My setup is as pictured:

http://i90.photobucket.com/albums/k265/David343/IMG_6921.jpg

Basically it's just 2 lines, one from the PCV and one from the valve cover to a vented catch can. I'm getting hardly any blow by (driven it 600 miles and only got a teaspoon in the can) but have a lot of pressure in the crank case.

I had to put a spring on my dipstick to prevent it from shooting out (a common issue, I know) and now oil is coming out of the oil fill cap, dripping onto the valve cover and eventually burning off. The result is that I'm burning a noticeable amount of oil from there and not only does it smell, but it worries me that I will run it low (a long shot, I know).

Could my issue be insufficient ventilation? Would -10AN to a catch can be beneficial? What have you all done on a setup like mine? I'm flowing 58lb/min at WOT right now.

I'm very green to DSMs but have a little understanding when it comes to PCV systems.

Thanks.

[DavidPHumes]

I should mention: although I don't have the normal symptoms (overheating, water in the oil, loss of water, smoke, etc.) I have a gut feeling that my HG is bad (I have had a rubber cap blow off of my lower tstat housing twice but once was because it was dry rotted and the other was because it was a 2 piece cap so it's tough to say why it happened). Can this cause excessive pressure? Compression is 165 across the board cold, 150 warm on all 4.

[Kracka]

Set it up like stock; breather to the intake pipe and PCV to the intake manifold.

[DavidPHumes]

Set it up like stock; breather to the intake pipe and PCV to the intake manifold.
If that's the answer then why does everyone "over complicate" things and go with the setup I have (albeit usually a "bigger" system overall)? I'm not trying to say you're wrong, just want to know the WHY. :)

BTW my plugs looked good so I don't *think* excessive blow-by is the culprit either.

[Kracka]

Everyone thinks they can out-engineer the engineers. From my experience, catch-cans seem to create more problems than they solve. Setting it up like stock always puts a suction on either the crankcase vent or PCV vent which is better than just allowing excessive pressure build up to escape on it's own. If that solution doesn't work, then do the same, only with larger lines. Having a little oil vapor/mist in your intake charge is actually a good thing since it helps keep the BOV and wastegate actuator internals lubricated.

[evotuner]

^interesting take, i may have to try this out myself

[C3L1CA]

I had the same issue until I went to a -10an setup, cured my problem of shooting the dipstick out.

http://a2.sphotos.ak.fbcdn.net/hphotos-ak-snc7/4443_560024509632_40103751_33444997_7345872_n.jpg

You drive a heavily modified dsm with a 2.4 and a gt35 that you plan on daily driving. A heavily modified dsm can make for a good daily, BUT you need to plan on checking things over a lot more often (like your oil level) than you would on a stock civic for example.

I had to keep an eye on my catch can and empty it every once in a while. I also didn't have any baffles in my valve cover either so that probably helped fill the catch can up even faster.

[turbotalon1g]

Pick up a JCS automation/calan catch can.
Use 2 -10AN lines from VC to can then a single -10 or -12AN to intake, his cans will not leave anything in your intake, I have one and love it.

[Halon]

This subject has been beaten to death here a few times. Check out some of the older threads for insight.

FWIW, I agree with the idea of keeping the stock pathway. Although I would consider putting sealed catchcan's in line with them, as well as consider increasing the line size of the one going to the inlet pipe.

[Dizmm]

for a stock-ish car, run the stock setup.

if your running 400+whp, then its time to create some bigger ports and allow the motor to breathe.